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Articoli di riviste sul tema "Photometric"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Sun, Mingxu, Bingqiu Chen, Helong Guo, He Zhao, Ming Yang, and Wenyuan Cui. "SPar: Estimating Stellar Parameters from Multiband Photometries with Empirical Stellar Libraries." Astronomical Journal 166, no. 3 (2023): 126. http://dx.doi.org/10.3847/1538-3881/ace5ab.

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Abstract Modern large-scale photometric surveys have provided us with multiband photometries of billions of stars. Determining the stellar atmospheric parameters, such as the effective temperature (T eff) and metallicities ([Fe/H]), absolute magnitudes (M G ), distances (d), and reddening values (E(G BP − G RP)) is fundamental to study the stellar populations, structure, kinematics, and chemistry of the Galaxy. This work constructed an empirical stellar library that maps the stellar parameters to multiband photometries from a data set with Gaia parallaxes, LAMOST atmospheric parameters, and op

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2

Evans, D. W., M. Riello, F. De Angeli, et al. "Gaia Photometric Catalogue: the calibration of the DR2 photometry." Proceedings of the International Astronomical Union 14, A30 (2018): 466–70. http://dx.doi.org/10.1017/s174392131900512x.

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AbstractGaia DR2 was released in April 2018 and contains a photometric catalogue of more than 1 billion sources. This release contains colour information in the form of integrated BP and RP photometry in addition to the latest G-band photometry. The level of uncertainty can be as good as 2 mmag with some residual systematics at the 10 mmag level. The addition of colour information greatly enhances the value of the photometric data for the scientific community. A high level overview of the photometric processing, with a focus on the improvements with respect to Gaia DR1, was given. The definiti

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3

Prokhorov, M. E., A. I. Zakharov, V. G. Moshkalev, N. L. Krusanova, and M. S. Tuchin. "Mass Computations of the Brightness of Stars in an Arbitrary Spectral Band." Астрономический журнал 100, no. 6 (2023): 500–511. http://dx.doi.org/10.31857/s0004629923050092.

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The problem of calculating the brightness of an array of stars in an arbitrary photometric band, which is not the standard band of astronomical photometry, is considered from their multicolor photometry in some other photometric system. A similar problem is to transfer photometric measurements of stars from one multicolor photometric system to another. This task includes methods for calculating and comparing magnitudes, as well as merging photometric catalogs. The questions of choice of various zero-points of photometry and reduction of measurements for the atmosphere are considered. The issue

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4

Fotopoulou, S., and S. Paltani. "CPz: Classification-aided photometric-redshift estimation." Astronomy & Astrophysics 619 (October 30, 2018): A14. http://dx.doi.org/10.1051/0004-6361/201730763.

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Broadband photometry offers a time and cost effective method to reconstruct the continuum emission of celestial objects. Thus, photometric redshift estimation has supported the scientific exploitation of extragalactic multiwavelength surveys for more than twenty years. Deep fields have been the backbone of galaxy evolution studies and have brought forward a collection of various approaches in determining photometric redshifts. In the era of precision cosmology, with the upcoming Euclid and LSST surveys, very tight constraints are put on the expected performance of photometric redshift estimati

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5

Li, Xiao Pan, Cheng Yang, Li Zhou, and Hai Tao Yang. "Photometric Data Procession of the Swift/UVOT Instrument." Advanced Materials Research 989-994 (July 2014): 3489–92. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.3489.

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The Ultraviolet/Optical Telescope (UVOT) which is one of three scientific instruments onboard the NASA-led Swift satellite provides simultaneous ultraviolet and optical photometric data. We present the installing procedures of HEASoft software and the detailed method for using the HEASoft in UVOT photometric data processions. We focus on the application of photometry processes, and present the photometry of Quasar PKS 0537-441. The analysis of the photometric data shows that this source has extreme variations in optical and ultraviolet bands and the shape of photometric flux curves in each ban

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6

Wittman, D., P. Riechers, and V. E. Margoniner. "Photometric Redshifts and Photometry Errors." Astrophysical Journal 671, no. 2 (2007): L109—L112. http://dx.doi.org/10.1086/525020.

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7

Walker, Alistair, Saul Adelman, Eugene Milone, et al. "DIVISION B COMMISSION 25: ASTRONOMICAL PHOTOMETRY AND POLARIMETRY." Proceedings of the International Astronomical Union 11, T29A (2015): 159–70. http://dx.doi.org/10.1017/s1743921316000727.

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Commission 25 (C25) deals with the techniques and issues involved with the measurement of optical and infrared radiation intensities and polarization from astronomical sources. As such, in recent years attention has focused on photometric standard stars, atmospheric extinction, photometric passbands, transformation between systems, nomenclature, and observing and reduction techniques. At the start of the trimester C25 changed its name from Stellar Photometry and Polarization to Astronomical Photometry and Polarization so as to explicitly include in its mandate particular issues arising from th

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8

Tatarnikov, A. M., та A. A. Tatarnikov. "Сolor transformation between photometric systems of 2MASS catalog and ASTRONIRCAM of SAI MSU 2.5-m telescope". Seriya 3: Fizika, Astronomiya, № 2_2023 (2 червня 2023): 2320801–1. http://dx.doi.org/10.55959/msu0579-9392.78.2320801.

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In this paper, we consider a method for determining the coefficients of the transformation equations between different photometric systems based on the photometry of all field stars recorded during observations of the primary standards of one of the photometric systems. Using this method, the coefficients of color transformation equations between the photometric system of ASTRONIRCAM of the 2.5-m telescope KGO SAI MSU and the 2MASS all-sky survey catalog photometric system are obtained.

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9

Toptun, Victoria A., Igor V. Chilingarian, Kirill A. Grishin, and Ivan Yu Katkov. "Color Transformations of Photometric Measurements of Galaxies in Optical and Near-infrared Wide-field Imaging Surveys*." Publications of the Astronomical Society of the Pacific 135, no. 1050 (2023): 084102. http://dx.doi.org/10.1088/1538-3873/aceca0.

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Abstract Over the past 2 decades, wide-field photometric surveys in optical and infrared domains reached a nearly all-sky coverage thanks to numerous observational facilities operating in both hemispheres. However, subtle differences among exact realizations of Johnson and SDSS photometric systems require one to convert photometric measurements into the same system prior to analysis of composite data sets originating from multiple surveys. It turns out that the published photometric transformations lead to substantial biases when applied to integrated photometry of galaxies from the correspond

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10

Pforr, Janine. "The Spitzer Extragalactic Representative Volume Survey - measuring photometric redshifts for ∼4 million galaxies - challenges and ways forward." Proceedings of the International Astronomical Union 15, S341 (2019): 157–61. http://dx.doi.org/10.1017/s1743921319002412.

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AbstractWe highlight the challenges as well as lessons learnt in the derivation of the photometric redshifts for ∼4 million galaxies at 0 < z ≲ 6 contained in the Spitzer Extragalactic Representative Volume Survey (SERVS) and summarise the photometric redshift results recently published in Pforr et al. (2019). The inhomogeneous nature of the ancillary photometry for SERVS presents a similar situation to the one future, large, extragalactic surveys with e.g. LSST and JWST will face. We employ template SED-fitting to determine photometric redshifts. Our comparison of photometric redshifts to

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11

Zhou, Rongpu, Michael C. Cooper, Jeffrey A. Newman, et al. "Deep ugrizY imaging and DEEP2/3 spectroscopy: a photometric redshift testbed for LSST and public release of data from the DEEP3 Galaxy Redshift Survey." Monthly Notices of the Royal Astronomical Society 488, no. 4 (2019): 4565–84. http://dx.doi.org/10.1093/mnras/stz1866.

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ABSTRACT We present catalogues of calibrated photometry and spectroscopic redshifts in the Extended Groth Strip, intended for studies of photometric redshifts (photo-z’s). The data includes ugriz photometry from Canada–France–Hawaii Telescope Legacy Survey (CFHTLS) and Y-band photometry from the Subaru Suprime camera, as well as spectroscopic redshifts from the DEEP2, DEEP3, and 3D-HST surveys. These catalogues incorporate corrections to produce effectively matched-aperture photometry across all bands, based upon object size information available in the catalogue and Moffat profile point sprea

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12

Whitten, D. D., V. M. Placco, T. C. Beers, et al. "J-PLUS: Identification of low-metallicity stars with artificial neural networks using SPHINX." Astronomy & Astrophysics 622 (February 2019): A182. http://dx.doi.org/10.1051/0004-6361/201833368.

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Context. We present a new methodology for the estimation of stellar atmospheric parameters from narrow- and intermediate-band photometry of the Javalambre Photometric Local Universe Survey (J-PLUS), and propose a method for target pre-selection of low-metallicity stars for follow-up spectroscopic studies. Photometric metallicity estimates for stars in the globular cluster M15 are determined using this method. Aims. By development of a neural-network-based photometry pipeline, we aim to produce estimates of effective temperature, Teff, and metallicity, [Fe/H], for a large subset of stars in the

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13

Lee, Bomee, and Ranga-Ram Chary. "Improved photometric redshifts with colour-constrained galaxy templates for future wide-area surveys." Monthly Notices of the Royal Astronomical Society 497, no. 2 (2020): 1935–45. http://dx.doi.org/10.1093/mnras/staa2100.

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ABSTRACT Cosmology and galaxy evolution studies with LSST, Euclid, and Roman, will require accurate redshifts for the detected galaxies. In this study, we present improved photometric redshift estimates for galaxies using a template library that populates three-colour space and is constrained by HST/CANDELS photometry. For the training sample, we use a sample of galaxies having photometric redshifts that allows us to train on a large, unbiased galaxy sample having deep, unconfused photometry at optical-to-mid infrared wavelengths. Galaxies in the training sample are assigned to cubes in 3D col

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14

Tedesco, Edward F. "Archiving Asteroid Photometric Data." Highlights of Astronomy 9 (1992): 719–20. http://dx.doi.org/10.1017/s1539299600010169.

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AbstractCurrent programs which produce asteroid photometric data range from astrometry through visual and near-infrared photometry and spectrophotometry to thermal infrared (8 to 30 micrometers) photometry. These data are published in a variety of places including observatory publications, IAU Circulars, the Minor Planet Circulars, and various journals.

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Davies, L. J. M., J. E. Thorne, A. S. G. Robotham, et al. "Deep Extragalactic VIsible Legacy Survey (DEVILS): consistent multiwavelength photometry for the DEVILS regions (COSMOS, XMMLSS, and ECDFS)." Monthly Notices of the Royal Astronomical Society 506, no. 1 (2021): 256–87. http://dx.doi.org/10.1093/mnras/stab1601.

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ABSTRACT The Deep Extragalactic VIsible Legacy Survey (DEVILS) is an ongoing high-completeness, deep spectroscopic survey of ∼60 000 galaxies to Y &lt; 21.2 mag, over ∼6 deg2 in three well-studied deep extragalactic fields: D10 (COSMOS), D02 (XMMLSS), and D03 (ECDFS). Numerous DEVILS projects all require consistent, uniformly derived and state-of-the-art photometric data with which to measure galaxy properties. Existing photometric catalogues in these regions either use varied photometric measurement techniques for different facilities/wavelengths leading to inconsistencies, older imaging

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16

Zhou, Rongpu, Arjun Dey, Dustin Lang, John Moustakas, Edward F. Schlafly, and David J. Schlegel. "Comparing the Photometric Calibration of DESI Imaging and Gaia Synthetic Photometry." Research Notes of the AAS 7, no. 5 (2023): 105. http://dx.doi.org/10.3847/2515-5172/acd7ef.

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Abstract The relative photometric calibration errors in the DESI Legacy Imaging Surveys (LS), which are used for DESI target selection, can leave imprints on the DESI target densities and bias the resulting cosmological measurements. We characterize the LS calibration systematics by comparing the LS stellar photometry with Gaia DR3 synthetic photometry. We find the stellar photometry of LS DR9 and Gaia has an rms difference of 4.7, 3.7, 4.4 mmag in DECam grz bands, respectively, when averaged over an angular scale of 27 ′ . There are distinct spatial patterns in the photometric offset resembli

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17

Rufener, F. "Passbands and Photometric Systems." Highlights of Astronomy 7 (1986): 813–17. http://dx.doi.org/10.1017/s1539299600007334.

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AbstractSynthetic photometry must be used to accurately define the passbands which characterize a photometric system. On the one hand, the colour indices of the stars must be coherent with their absolute spectrophotometry; on the other hand, direct comparisons of model atmospheres with observations must be carried out without resorting to arbitrary transformations. A systematic evaluation procedure could be applied to various photometric systems.

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18

Li, Shijie, Weijun Lin, Qingyuan Xiang, Yunbin Tu, Shitan Asu, and Zheng Li. "Unsupervised Photometric-Consistent Depth Estimation from Endoscopic Monocular Video." Proceedings of the AAAI Conference on Artificial Intelligence 39, no. 5 (2025): 4923–31. https://doi.org/10.1609/aaai.v39i5.32521.

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Recent advancements in unsupervised monocular depth estimation typically rely on an assumption that image photometry remains consistent across consecutive frames. However, this assumption often fails in endoscopic scenes due to: 1) local photometric inconsistency caused by specular reflections creating highlights; and 2) global photometric inconsistency resulting from the simultaneous movement of the light source and the camera. Since unsupervised depth estimation methods rely on appearance discrepancies between frames as a supervisory signal, these photometric inconsistencies inevitably deter

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19

De Ridder, Joris, Conny Aerts, and Marc-Antoine Dupret. "Mode Identification Using Photometry and Spectroscopy." International Astronomical Union Colloquium 193 (2004): 466–69. http://dx.doi.org/10.1017/s0252921100011155.

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AbstractWe tested a stepwise approach to combine photometry and spectroscopy for mode identification where we first used the photometric amplitude ratios to restrict the degree l, then did a spectroscopic mode identification, and finally fitted the photometric amplitudes to restrict the list of candidate modes. For the spectroscopic mode identification, we implemented an efficient multi-mode moment method variant. We conclude that this new variant works well, but that the photometric amplitudes are too model sensitive to do any additional mode discrimination.

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20

Weaver, J. R., O. B. Kauffmann, O. Ilbert, et al. "COSMOS2020: A Panchromatic View of the Universe to z ∼ 10 from Two Complementary Catalogs." Astrophysical Journal Supplement Series 258, no. 1 (2022): 11. http://dx.doi.org/10.3847/1538-4365/ac3078.

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Abstract The Cosmic Evolution Survey (COSMOS) has become a cornerstone of extragalactic astronomy. Since the last public catalog in 2015, a wealth of new imaging and spectroscopic data have been collected in the COSMOS field. This paper describes the collection, processing, and analysis of these new imaging data to produce a new reference photometric redshift catalog. Source detection and multiwavelength photometry are performed for 1.7 million sources across the 2 deg2 of the COSMOS field, ∼966,000 of which are measured with all available broadband data using both traditional aperture photome

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21

Bessell, Michael S. "Photometric Systems." International Astronomical Union Colloquium 136 (1993): 22–39. http://dx.doi.org/10.1017/s025292110000734x.

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AbstractMulticolour photometry has historically been carried out within a variety of standard systems. With the advent of new detectors with different wavelength sensitivities to those of the original system and the use of subsets of secondary standards, many subtle and not so subtle changes have occurred to the original systems. However, by reverse engineering, the passbands of the modified standard systems can be determined which enables good realisation of theoretical colours and better passband matching for CCD-based photometry. In this paper, the various photometric systems will be discus

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22

Leung, Gene C. K., Steven L. Finkelstein, John R. Weaver, et al. "The Spitzer–HETDEX Exploratory Large-Area Survey. IV. Model-based Multiwavelength Photometric Catalog." Astrophysical Journal Supplement Series 269, no. 2 (2023): 46. http://dx.doi.org/10.3847/1538-4365/acfe78.

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Abstract We present a 0.3–4.5 μm 16-band photometric catalog for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers an ∼27 deg2 field within the footprint of the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX). Here we present new DECam imaging and an rizK s band–selected catalog of four million sources extracted using a fully model-based approach. We validate our photometry by comparing with the model-based DECam Legacy Survey. We analyze the differences between model-based and aperture photometry by comparing with the previous SHELA catalog, finding that our model-

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Tinbergen, Jaap. "New Techniques." International Astronomical Union Colloquium 136 (1993): 130–46. http://dx.doi.org/10.1017/s025292110000748x.

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AbstractRoutine millimagnitude photometry may require a new approach to reduction of photometric errors. Such an approach is outlined in this paper; it stresses elimination of each error as close to its source as possible. The possibilities provided by modern technology are reviewed in this light. An engineering design group dedicated to photometry is a prerequisite and an on-site photometric technician may be necessary. In this concept, observers are mainly remote users of a database. Implied is the idea of accurate photometry necessarily developing into a single but multi-site astronomical f

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Ohta, Kouji. "Global Photometric Properties of Barred Galaxies." International Astronomical Union Colloquium 157 (1996): 37–43. http://dx.doi.org/10.1017/s0252921100049393.

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Xiao, Kai, Haibo Yuan, C. López-Sanjuan, et al. "J-PLUS: Photometric Recalibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry Method." Astrophysical Journal Supplement Series 269, no. 2 (2023): 58. http://dx.doi.org/10.3847/1538-4365/ad0645.

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Abstract We employ the corrected Gaia Early Data Release 3 photometric data and spectroscopic data from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR7 to assemble a sample of approximately 0.25 million FGK dwarf photometric standard stars for the 12 J-PLUS filters using the stellar color regression (SCR) method. We then independently validate the J-PLUS DR3 photometry and uncover significant systematic errors: up to 15 mmag in the results from the stellar locus method and up to 10 mmag primarily caused by magnitude-, color-, and extinction-dependent errors of the Ga

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Xiao, Kai, Yang Huang, Haibo Yuan, et al. "S-PLUS: Photometric Recalibration with the Stellar Color Regression Method and an Improved Gaia XP Synthetic Photometry Method." Astrophysical Journal Supplement Series 271, no. 2 (2024): 41. http://dx.doi.org/10.3847/1538-4365/ad24fa.

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Abstract We present a comprehensive recalibration of narrowband/medium-band and broadband photometry from the Southern Photometric Local Universe Survey (S-PLUS) by leveraging two approaches: an improved Gaia XP synthetic photometry (XPSP) method with corrected Gaia XP spectra, and the stellar color regression (SCR) method with corrected Gaia Early Data Release 3 photometric data and spectroscopic data from LAMOST Data Release 7. Through the use of millions of stars as standards per band, we demonstrate the existence of position-dependent systematic errors, up to 23 mmag for the main survey re

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Aathil, Abdullah Mohamed. "Review on Photometric Study of Variable Stars." Acceleron Aerospace Journal 2, no. 6 (2024): 316–28. http://dx.doi.org/10.61359/11.2106-2425.

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This literature review focuses on variable stars, which exhibit changes in brightness over time. This topic is vital in astronomical research, particularly due to the abundance of telescope data available in archives. The photometric study of variable stars is significant for understanding stellar evolution, classifying stars, and contributing to cosmological research. It enables precise distance measurements, examines exoplanetary systems, and identifies rare astronomical phenomena, thereby expanding our understanding of the universe. The study begins by outlining the fundamentals of variable

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Noguchi, Kunio, Jinghao Sun, and Gang Wang. "Infrared Spectra and Circumstellar Emission of Late-Type Stars. III. S-Type Stars." Publications of the Astronomical Society of Japan 43, no. 2 (1991): 311–43. https://doi.org/10.1093/pasj/43.2.311.

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Abstract Near-infrared photometry was carried out at the J, H, K, and L bands for 73 S-type stars. The statistical characteristics of the infrared spectra and the circumstellar emission of S-type stars were examined using nearinfrared photometric data, IRAS photometric data, and the low-resolution spectra obtained by IRAS. The characteristics of the photometric spectra of S-type stars were compared with those of oxygen-rich stars and carbon stars. We found that MS and SC stars have infrared spectral characteristics similar to those of both oxygen-rich stars and carbon stars, respectively. Howe

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Riello, M., F. De Angeli, D. W. Evans, et al. "Gaia Data Release 2." Astronomy & Astrophysics 616 (August 2018): A3. http://dx.doi.org/10.1051/0004-6361/201832712.

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Context. The second Gaia data release is based on 22 months of mission data with an average of 0.9 billion individual CCD observations per day. A data volume of this size and granularity requires a robust and reliable but still flexible system to achieve the demanding accuracy and precision constraints that Gaia is capable of delivering. Aims. We aim to describe the input data, the treatment of blue photometer/red photometer (BP/RP) low-resolution spectra required to produce the integrated GBP and GRP fluxes, the process used to establish the internal Gaia photometric system, and finally, the

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Goodeve, Joshua L. "Light Streak Photometry and Streaktools." Astronomical Journal 169, no. 3 (2025): 151. https://doi.org/10.3847/1538-3881/ada950.

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Abstract The accuracy of photometric calibration has gradually become a limiting factor in various fields of astronomy, limiting the scientific output of a host of research. Calibration using artificial light sources in low Earth orbit remains largely unexplored. Here, we demonstrate that photometric calibration using light sources in low Earth orbit is a viable and competitive alternative/complement to current calibration techniques, and explore the associated ideas and basic theory. We present the publicly available Python code Streaktools as a means to simulate and perform photometric calib

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Percy, John R., Nancy Wong, Dietmar Bohme, et al. "Photometric surveys of suspected small-amplitude red variables. 3: an AAVSO photometric photometry survey." Publications of the Astronomical Society of the Pacific 106 (June 1994): 611. http://dx.doi.org/10.1086/133420.

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Kibblewhite, E. J., M. G. M. Cawson, S. Phillipps, J. I. Davies, and M. J. Disney. "Automated galaxy surface photometry - IV. Photometric comparisons." Monthly Notices of the Royal Astronomical Society 236, no. 2 (1989): 187–206. http://dx.doi.org/10.1093/mnras/236.2.187.

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Bódi, Attila, Pál Szabó, Emese Plachy, László Molnár, and Róbert Szabó. "Automated Extended Aperture Photometry of K2 Variable Stars." Publications of the Astronomical Society of the Pacific 134, no. 1031 (2022): 014503. http://dx.doi.org/10.1088/1538-3873/ac4398.

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Abstract Proper photometric data are challenging to obtain in the K2 mission of the Kepler space telescope due to strong systematics caused by the two-wheel-mode operation. It is especially true for variable stars wherein physical phenomena occur on timescales similar to the instrumental signals. We originally developed a method with the aim to extend the photometric aperture to be able to compensate the motion of the telescope which we named Extended Aperture Photometry (EAP). Here we present the outline of the automatized version of the EAP method, an open-source pipeline called autoEAP. We

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Evans, D. W., M. Riello, F. De Angeli, et al. "Gaia Data Release 2." Astronomy & Astrophysics 616 (August 2018): A4. http://dx.doi.org/10.1051/0004-6361/201832756.

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Aims. We describe the photometric content of the second data release of the Gaia project (Gaia DR2) and its validation along with the quality of the data. Methods. The validation was mainly carried out using an internal analysis of the photometry. External comparisons were also made, but were limited by the precision and systematics that may be present in the external catalogues used. Results. In addition to the photometric quality assessment, we present the best estimates of the three photometric passbands. Various colour-colour transformations are also derived to enable the users to convert

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ČAVLOVIĆ, ANKA OZANA, and IVAN BEŠLIĆ. "APPLICATION OF PHOTOMETRY IN DETERMINING THE DUST MASS CONCENTRATION OF HARDWOODS." WOOD RESEARCH 66(4) 2021 66, no. 4 (2021): 678–88. http://dx.doi.org/10.37763/wr.1336-4561/66.4.678688.

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Given the carcinogenicity of hardwood dust, the aim of this study was to determine the effectiveness of the photometric method for different types of woodworking machines and its application in determining the mass concentration of inhalable dust for raw and dry hardwoods. In addition to the optical part of the device, the input part of the measuring device contains the Institute of Occupational Medicine (IOM) inhalable dust filter holder. This correlation of gravimetric and photometric methods in determining the dust mass concentration showed that photometry underestimates the mass concentrat

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Weiler, Michael. "Revised Gaia Data Release 2 passbands." Astronomy & Astrophysics 617 (September 2018): A138. http://dx.doi.org/10.1051/0004-6361/201833462.

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Context. The European Space Agency mission Gaia has published, with its second data release (DR2), a catalogue of photometric measurements for more than 1.3 billion astronomical objects in three passbands. The precision of the measurements in these passbands, denoted G, GBP, and GRP, reach down to the milli-magnitude level. The scientific exploitation of this data set requires precise knowledge of the response curves of the three passbands. Aims. This work aims to improve the exploitation of the photometric data by deriving an improved set of response curves for the three passbands, allowing f

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Rios-Venegas, C., A. Contreras-Quijada, N. Vogt, et al. "Revisiting the post-common-envelope binaries HZ 9, KV Vel and Abell 65." Monthly Notices of the Royal Astronomical Society 493, no. 1 (2020): 1197–203. http://dx.doi.org/10.1093/mnras/staa331.

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ABSTRACT New time-resolved photometric observations of three close but detached white dwarf/red dwarf binaries have enabled an in-depth analysis of their properties, combining new data with known information. For HZ 9, time-resolved photometric data have not been published previously. Our data reveal sinusoidal variations, with the orbital period showing unusual phase shifts between expected and observed light maximum epochs when combining our photometry with the precise radial velocity ephemeris. There are also variations of the photometric amplitude between 0.04 and 0.11 mag. Phase shifts an

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Evans, Dafydd Wyn, Marco Riello, Francesca De Angeli, et al. "Gaia Photometric Data: DR1 results and DR2 expectations." Proceedings of the International Astronomical Union 12, S330 (2017): 30–34. http://dx.doi.org/10.1017/s1743921317006329.

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AbstractGaia DR1 was released in September 2016 and contained a photometric catalogue of over 1 billion sources. At this stage, this only included mean G-band photometry and an estimate of the error. Even though this may sound limited in nature, interesting science can still be achieved with this data thanks to its quality. A high level overview of the photometric processing and some validation results will be presented. Additionally, epoch photometry in the G-band was released in Gaia DR1 for a small number of variable sources in the South Ecliptic Pole which covers the LMC. The second data r

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Chornay, Nicholas, and Nicholas A. Walton. "New Close Binary Central Stars of Planetary Nebulae from Gaia DR3 Epoch Photometry." Research Notes of the AAS 6, no. 9 (2022): 177. http://dx.doi.org/10.3847/2515-5172/ac8e6c.

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Abstract Close binary interactions perform a key role in the formation and shaping of planetary nebulae (PNe). However only a small fraction of Galactic PNe are known to host close binary systems. Many such systems are detectable through photometric variability. We searched recently published epoch photometry data from Gaia DR3 for planetary nebula central stars with periodic photometric variability indicative of binarity, uncovering four previously unknown close binaries.

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H. Puzia, Thomas, Markus Kissler-Patig, Jean Brodie, et al. "Extragalactic Globular Cluster Systems in the Near-IR." Symposium - International Astronomical Union 207 (2002): 294–300. http://dx.doi.org/10.1017/s0074180900223887.

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Extragalactic Globular Clusters are useful tracers of galaxy formation and evolution. Photometric studies of globular cluster systems beyond the Local Group are still the most popular method to investigate their physical properties, such as their ages and metallicities. However, the limitations of optical photometry are well known. The better wavelength sampling of the underlying cluster's SED using K-band photometry combined with optical passbands allows us to create colors which reduce the age-metallicity degeneracy to the largest extent. Here we report on the very first results of our near-

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Jeong, Hyeon, Soogyum Kim, Euijoon Lee, Hyunmin Ko, and Ho Lee. "Photometric Observations of Open Clusters Using Mobile Phone Camera." Korean Science Education Society for the Gifted 17, no. 1 (2025): 148–55. https://doi.org/10.29306/jseg.2025.17.1.148.

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This study explores the feasibility of conducting photometric observations using mobile phones in combination with small telescopes. For this study photometric observations of the open cluster M45 (Pleiades) were carried out using a mobile phone camera mounted on a small telescope. Due to the limited full well capacity of the mobile sensor, stacking multiple short-exposure images proved more effective than long-exposure imaging for determining the magnitudes of a greater number of stars. To place the data on a standard photometric scale, Bayer filter magnitudes derived from the mobile phone we

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Weisz, Daniel R., Andrew E. Dolphin, Alessandro Savino, et al. "The JWST Resolved Stellar Populations Early Release Science Program. V. DOLPHOT Stellar Photometry for NIRCam and NIRISS." Astrophysical Journal Supplement Series 271, no. 2 (2024): 47. http://dx.doi.org/10.3847/1538-4365/ad2600.

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Abstract We present NIRCam and NIRISS modules for DOLPHOT, a widely used crowded-field stellar photometry package. We describe details of the modules including pixel masking, astrometric alignment, star finding, photometry, catalog creation, and artificial star tests. We tested these modules using NIRCam and NIRISS images of M92 (a Milky Way globular cluster), Draco II (an ultrafaint dwarf galaxy), and Wolf–Lundmark–Mellote (a star-forming dwarf galaxy). DOLPHOT’s photometry is highly precise, and the color–magnitude diagrams are deeper and have better definition than anticipated during origin

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Parimucha, Š., M. Vaňko, and P. Mikloš. "SPHOTOM – Package for an Automatic Multicolour Photometry." Proceedings of the International Astronomical Union 7, S282 (2011): 81–82. http://dx.doi.org/10.1017/s1743921311026998.

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AbstractWe present basic information about package SPHOTOM for an automatic multicolour photometry. This package is in development for the creation of a photometric pipe-line, which we plan to use in the near future with our new instruments. It could operate in two independent modes, (i) GUI mode, in which the user can select images and control functions of package through interface and (ii) command line mode, in which all processes are controlled using a main parameter file. SPHOTOM is developed as a universal package for Linux based systems with easy implementation for different observatorie

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Mantegazza, L., та E. Poretti. "Insights into the Pulsational Behaviour of δ Sct Stars". International Astronomical Union Colloquium 155 (1995): 337–38. http://dx.doi.org/10.1017/s0252921100037386.

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Extensive photometric monitoring of bright δ Scuti stars, made in the last years, allowed us to get reliable frequency determinations also in very complicated cases. Table 1 gives a full description of our photometric targets. Recently, we realized that combining photometry with simultaneous high resolution spectroscopy, in order to study line profile variations, offers the possibility to perform a much more reliable mode identification. Hence, the photometric runs of FG Vir, X Cae, HD 2724 were paired with spectroscopic ones obtained at the Coudé Auxiliary Telescope (ESO, La Silla, Chile). Th

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45

Ogane, Y., O. Ohshima, D. Taniguchi, and N. Takanashi. "UBVRI PHOTOMETRY OF BETELGEUSE OVER 23 YEARS SINCE 1999." Open European Journal on Variable stars, no. 233 (2022): 1–11. http://dx.doi.org/10.5817/oejv2022-0233.

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We report the results of our continuous UBVRI-band photometry of Betelgeuse from 1999 to 2022 using the same photometric system. There are two advantages in our observation: (1) we used a photodiode as a detector to avoid saturation, and (2) our data set includes U-band light curve, which is not widely observed in recent CCD photometries. Using our light curves, we conducted the periodicity analysis, and found ~405- and ~2160- day periods. We also discuss the tentative detection of a long-period variation over 20 years or longer. Finally, we discuss the peculiar variation of the U - B color in

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Zhang, F., L. Li, and Z. Han. "Binary interactions and UV photometry on photometric redshift." Proceedings of the International Astronomical Union 5, S262 (2009): 452–53. http://dx.doi.org/10.1017/s1743921310003674.

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AbstractUsing the Hyperz code (Bolzonella et al. 2000) we present photometric redshift estimates for a random sample of galaxies selected from the SDSS/DR7 and GALEX/DR4, for which spectroscopic redshifts are also available.We confirm that the inclusion of ultraviolet photometry improves the accuracy of photo-zs for those galaxies with g* – r* ≤ 0.7 and zspec ≤ 0.2. We also address the problem of how binary interactions can affect photo-z estimates, and find that their effect is negligible.

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Tümer, O., C. Ibanoĝlu, S. Evren, and Z. Tunca. "Photoelectric photometry and photometric elements of LX Persei." Astrophysics and Space Science 112, no. 2 (1985): 273–86. http://dx.doi.org/10.1007/bf00653510.

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48

Laigle, C., I. Davidzon, O. Ilbert, et al. "Horizon-AGN virtual observatory – 1. SED-fitting performance and forecasts for future imaging surveys." Monthly Notices of the Royal Astronomical Society 486, no. 4 (2019): 5104–23. http://dx.doi.org/10.1093/mnras/stz1054.

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Abstract (sommario):

Abstract Using the light-cone from the cosmological hydrodynamical simulation horizon-AGN, we produced a photometric catalogue over 0 &lt; z &lt; 4 with apparent magnitudes in COSMOS, Dark Energy Survey, Large Synoptic Survey Telescope (LSST)-like, and Euclid-like filters at depths comparable to these surveys. The virtual photometry accounts for the complex star formation history (SFH) and metal enrichment of horizon-AGN galaxies, and consistently includes magnitude errors, dust attenuation, and absorption by intergalactic medium. The COSMOS-like photometry is fitted in the same config

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Chang, Kimmy, Alex Cabello, Jeff Houchard, Jonathan Gazak, and Justin Fletcher. "Leveraging Synthetic Data for Star and Satellite Photometry." American Journal of Optics and Photonics 12, no. 2 (2024): 18–29. http://dx.doi.org/10.11648/j.ajop.20241202.11.

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Abstract (sommario):

In the realm of Space Domain Awareness (SDA), precise photometric measurements are essential for applications such as stability analysis, shape recovery, and material studies of satellites. However, current methods that rely on manual data collection and analysis are not scalable to autonomous frameworks, which are increasingly necessary due to the growing congestion in space. This research presents an approach to automate photometric measurements within a network of telescopes operating in non-ideal conditions. Our work focuses on achieving reliable photometry in degraded weather conditions,

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Yang, Qian, and Yue Shen. "A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2." Astrophysical Journal Supplement Series 264, no. 1 (2022): 9. http://dx.doi.org/10.3847/1538-4365/ac9ea8.

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Abstract We present a catalog of 1.4 million photometrically selected quasar candidates in the southern hemisphere over the ∼5000 deg2 Dark Energy Survey (DES) wide survey area. We combine optical photometry from the DES second data release (DR2) with available near-infrared (NIR) and the all-sky unWISE mid-infrared photometry in the selection. We build models of quasars, galaxies, and stars with multivariate skew-t distributions in the multidimensional space of relative fluxes as functions of redshift (or color for stars) and magnitude. Our selection algorithm assigns probabilities for quasar

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