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Journal articles on the topic 'Burst Localisation'

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1

Walker, C. R. H., R. P. Breton, P. A. Harrison, et al. "LOFT-e: Localisation Of Fast Transients with e-MERLIN." Proceedings of the International Astronomical Union 13, S337 (2017): 422–23. http://dx.doi.org/10.1017/s1743921317010377.

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AbstractThe majority of fast radio bursts (FRBs) are poorly localised, hindering their potential scientific yield as galactic, intergalactic, and cosmological probes. LOFT-e, a digital backend for the U.K.’s e-MERLIN seven-telescope interferometer will provide commensal search and real-time detection of FRBs, taking full advantage of its field of view (FoV), sensitivity, and observation time. Upon burst detection, LOFT-e will store raw data offline, enabling the sub-arcsecond localisation provided by e-MERLIN and expanding the pool of localised FRBs. The high-time resolution backend will addit
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2

Sreeramamurthy, Vanapalli, Saptarsi Dutta, Sankarsan Padhy, and Aniruddha Bose. "Determining Point of Burst of Artillery Shells using Acoustic Source Localisation." Defence Science Journal 64, no. 6 (2014): 517–23. http://dx.doi.org/10.14429/dsj.64.8112.

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3

Oostrum, L. C., Y. Maan, J. van Leeuwen, et al. "Repeating fast radio bursts with WSRT/Apertif." Astronomy & Astrophysics 635 (March 2020): A61. http://dx.doi.org/10.1051/0004-6361/201937422.

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Context. Repeating fast radio bursts (FRBs) present excellent opportunities to identify FRB progenitors and host environments as well as to decipher the underlying emission mechanism. Detailed studies of repeating FRBs might also hold clues as to the origin of FRBs as a population. Aims. We aim to detect bursts from the first two repeating FRBs, FRB 121102 (R1) and FRB 180814.J0422+73 (R2), and to characterise their repeat statistics. We also want to significantly improve the sky localisation of R2 and identify its host galaxy. Methods. We used the Westerbork Synthesis Radio Telescope to condu
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4

Nicastro, Luciano, Cristiano Guidorzi, Eliana Palazzi, Luca Zampieri, Massimo Turatto, and Angela Gardini. "Multiwavelength Observations of Fast Radio Bursts." Universe 7, no. 3 (2021): 76. http://dx.doi.org/10.3390/universe7030076.

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The origin and phenomenology of the Fast Radio Burst (FRB) remains unknown despite more than a decade of efforts. Though several models have been proposed to explain the observed data, none is able to explain alone the variety of events so far recorded. The leading models consider magnetars as potential FRB sources. The recent detection of FRBs from the galactic magnetar SGR J1935+2154 seems to support them. Still, emission duration and energetic budget challenge all these models. Like for other classes of objects initially detected in a single band, it appeared clear that any solution to the
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5

Melandri, A., A. Rossi, S. Benetti, et al. "Unveiling the enigma of ATLAS17aeu." Astronomy & Astrophysics 621 (January 2019): A81. http://dx.doi.org/10.1051/0004-6361/201833814.

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Aims. The unusual transient ATLAS17aeu was serendipitously detected within the sky localisation of the gravitational wave trigger GW 170104. The importance of a possible association with gravitational waves coming from a binary black hole merger led to an extensive follow-up campaign, with the aim of assessing a possible connection with GW 170104. Methods. With several telescopes, we carried out both photometric and spectroscopic observations of ATLAS17aeu, for several epochs, between ∼3 and ∼230 days after the first detection. Results. We studied in detail the temporal and spectroscopic prope
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6

Wadelin, Frances R., Keith A. Spriggs, Franco H. Falcone, and David M. Heery. "Transcriptional and Translational Regulation of the Cancer-Testis Antigen PRAME Mediated by Pathogen-Associated Molecular Patterns." Blood 116, no. 21 (2010): 2475. http://dx.doi.org/10.1182/blood.v116.21.2475.2475.

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Abstract Abstract 2475 PRAME (preferentially expressed antigen in melanoma) is a germinal tissue-specific gene that is expressed at high levels in a number of haematological malignancies. In AML, PRAME is a positive prognostic indicator, being associated with a favourable response to chemotherapy and increased overall survival, even in the presence of unfavourable karyotypes. In contrast, over-expression of PRAME mRNA is associated with poor prognosis in CML, NHL, HD, CLL and myeloma, being associated with progressive disease and chemo-resistance. Despite proposals to implement PRAME as a tool
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7

Sim, Neil, Sven Gottschalk, Robert Pal, et al. "Wavelength-dependent optoacoustic imaging probes for NMDA receptor visualisation." Chemical Communications 51, no. 82 (2015): 15149–52. http://dx.doi.org/10.1039/c5cc06277b.

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The cellular localisation and binding specificity of two NMDAR-targeted near-IR imaging probes has been examined by microscopy, followed by exemplification of MSOT to monitor simulated glutamate bursts in cellulo and a preliminary study in mice observing the signal in the brain.
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8

Marnoch, Lachlan, Stuart D. Ryder, Keith W. Bannister, et al. "A search for supernova-like optical counterparts to ASKAP-localised fast radio bursts." Astronomy & Astrophysics 639 (July 2020): A119. http://dx.doi.org/10.1051/0004-6361/202038076.

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Fast radio bursts (FRBs) are millisecond-scale radio pulses, which originate in distant galaxies and are produced by unknown sources. The mystery remains partially because of the typical difficulty in localising FRBs to host galaxies. Accurate localisations delivered by the Commensal Real-time ASKAP Fast Transients (CRAFT) survey now provide an opportunity to study the host galaxies and potential transient counterparts of FRBs at a large range of wavelengths. In this work, we investigate whether the first three FRBs accurately localised by CRAFT have supernova-like transient counterparts. We o
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9

Walker, Charles R. H., Yin-Zhe Ma, and René P. Breton. "Constraining the redshifts of unlocalised fast radio bursts." Astronomy & Astrophysics 638 (June 2020): A37. http://dx.doi.org/10.1051/0004-6361/201833157.

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Context. The relationship between the dispersion measures (DMs) and redshifts of fast radio bursts (FRBs) is of scientific interest. Upcoming commensal surveys may detect and localise many FRBs to the sub-arcsecond angular resolutions required for accurate redshift determination. Meanwhile, it is important to exploit sources accumulated with more limited localisation to their maximum scientific potential. Aims. We present techniques for the DM-redshift analysis of large numbers of unlocalised FRBs, accounting for uncertainties due to their extragalactic DM components, redshift dependences, and
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10

Caleb, M., C. Flynn, M. Bailes, et al. "First interferometric detections of Fast Radio Bursts." Proceedings of the International Astronomical Union 13, S337 (2017): 322–23. http://dx.doi.org/10.1017/s1743921317008973.

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AbstractThe class of radio transients called Fast Radio Bursts (FRBs) encompasses enigmatic single pulses, each unique in its own way, hindering a consensus for their origin. The key to demystifying FRBs lies in discovering many of them in order to identity commonalities – and in real time, in order to find potential counterparts at other wavelengths. The recently upgraded UTMOST in Australia, is undergoing a backend transformation to rise as a fast transient detection machine. The first interferometric detections of FRBs with UTMOST, place their origin beyond the near-field region of the tele
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11

Malenta, Mateusz, Ewan Barr, Aaron Chippendale, et al. "PAFINDER – Searching for FRBs and pulsars using Phased Array Feeds." Proceedings of the International Astronomical Union 13, S337 (2017): 370–71. http://dx.doi.org/10.1017/s1743921317008511.

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AbstractThe challenges of detecting and localising Fast Radio Bursts in real time can be met with the use of Phased Array Feeds. One such system, capable of creating up to 36 simultaneous beams, is currently being commissioned at the Effelsberg radio telescope in Germany following testing at the 64 m Parkes radio telescope. The PAFINDER (Phased Array Feed FRB Finder) pipeline will be used with this receiver to enable real–time single–pulse detection and localisation.
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12

Zhang, M., M. Huang, and C. Wu. "Design, Build and Test of the VOEvent Network for the SVOM Chinese Ground Segment." Proceedings of the International Astronomical Union 14, S339 (2017): 353. http://dx.doi.org/10.1017/s1743921318003009.

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AbstractThe Space-based, multi-band, astronomical Variable Object Monitor (SVOM) is a collaborative project between China and France dedicated to the detection, localisation and study of about 60 Gamma Ray Bursts per year, and other high-energy transient phenomena. SVOM is planned to be launched in 2021, with a lifetime of 3–5 years. The poster described our construction and testing of a prototype to set up an interface between our data reduction sub-system, the global VOEvent network, and the French science centre.
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13

Salehipour, Hesam, C. P. Caulfield, and W. R. Peltier. "Turbulent mixing due to the Holmboe wave instability at high Reynolds number." Journal of Fluid Mechanics 803 (August 30, 2016): 591–621. http://dx.doi.org/10.1017/jfm.2016.488.

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We consider numerically the transition to turbulence and associated mixing in stratified shear flows with initial velocity distribution $\overline{U}(z,0)\,\boldsymbol{e}_{x}=U_{0}\,\boldsymbol{e}_{x}\tanh (z/d)$ and initial density distribution $\overline{\unicode[STIX]{x1D70C}}(z,0)=\unicode[STIX]{x1D70C}_{0}[1-\tanh (z/\unicode[STIX]{x1D6FF})]$ away from a hydrostatic reference state $\unicode[STIX]{x1D70C}_{r}\gg \unicode[STIX]{x1D70C}_{0}$. When the ratio $R=d/\unicode[STIX]{x1D6FF}$ of the characteristic length scales over which the velocity and density vary is equal to one, this flow is
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14

Benchikh Elfegoun, Mohamed Chérif, Karima Kohil, Mohamed Gharbi, Larbi Afoutni, and Mohamed Lamine Benachour. "Cinétique d’infestation par les tiques des bovins de la région subhumide de Constantine en Algérie." Revue d’élevage et de médecine vétérinaire des pays tropicaux 72, no. 1 (2019): 41. http://dx.doi.org/10.19182/remvt.31726.

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Une étude a été menée de mai 2008 à avril 2009 pour déterminer une fois par mois dans deux élevages de la région de Constantine (étage subhumide de l’Algérie), situés respectivement à 500 et 1000 mètres d’altitude, l’évolution de l’infestation des bovins par les tiques. Sur quarante bovins suivis (20 par élevage), 2031 tiques ont été récoltées sur les différentes régions anatomiques (périnée, mamelle, scrotum, oreilles, entre autres). Sept espèces de tiques réparties en quatre genres ont été identifiées : Rhipicephalus bursa (48,5 %), tiques du groupe R. sanguineus (26,6 %), Hyalomma marginatu
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15

Morhart, C., and E. M. Biebl. "Cooperative multi-user detection and ranging based on pseudo-random codes." Advances in Radio Science 7 (May 18, 2009): 55–59. http://dx.doi.org/10.5194/ars-7-55-2009.

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Abstract. We present an improved approach for a Round Trip Time of Flight distance measurement system. The system is intended for the usage in a cooperative localisation system for automotive applications. Therefore, it is designed to address a large number of communication partners per measurement cycle. By using coded signals in a time divison multiple access order, we can detect a large number of pedestrian sensors with just one car sensor. We achieve this by using very short transmit bursts in combination with a real time correlation algorithm. Futhermore, the correlation approach offers r
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16

Ali, Syed-Mohamed, An-Soo Chan, and Seng-Kee Leong. "Histochemical and immunohistochemical localisation of nitrergic neuronal and non-neuronal cells in the bursa of Fabricius of the chicken." Cell and Tissue Research 285, no. 2 (1996): 273–79. http://dx.doi.org/10.1007/s004410050644.

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17

Szentkereszty, Zsolt, Klaudia Balog, Lídia Balázs, and Adrien Csiszkó. "A demarkált pancreasnecrosis kezelése. Irodalmi áttekintés." Orvosi Hetilap 157, no. 47 (2016): 1866–70. http://dx.doi.org/10.1556/650.2016.30509.

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Walled-off pancreatic necrosis is a late complication of severe acute pancreatitis that generally needs some interventions. The aim of this review is to analyse the indications, technical aspects and limits of these therapeutic options. The development of the walled-off pancreatic necrosis needs 4–6 weeks from the onset of the disease. The necrosectomy is recommended after this time. Endoscopic necrosectomy offers good results if the necrosis is in retrogastric or retroduodenal localisations. Open necrosectomy can be performed through the gastrocolic ligament or the mesocolon. It is suggested
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18

Vigneresse, Jean Louis. "A new paradigm for granite generation." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 95, no. 1-2 (2004): 11–22. http://dx.doi.org/10.1017/s0263593300000882.

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ABSTRACTIdeas about granite generation have evolved considerably during the past two decades. The present paper lists the ideas which were accepted and later modified concerning the processes acting during the four stages of granite generation: melting, melt segregation and ascent, and emplacement. The active role of the mantle constitutes a fifth stage.Fluid-assisted melting, deduced from metamorphic observations, was used to explain granite and granulite formation. Water seepage into meta-sedimentary rocks can produce granitic melt by decreasing melting temperature. CO2 released by the mantl
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19

Day, Cherie K., Adam T. Deller, Clancy W. James, et al. "Astrometric accuracy of snapshot fast radio burst localisations with ASKAP." Publications of the Astronomical Society of Australia 38 (2021). http://dx.doi.org/10.1017/pasa.2021.40.

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Abstract The recent increase in well-localised fast radio bursts (FRBs) has facilitated in-depth studies of global FRB host properties, the source circumburst medium, and the potential impacts of these environments on the burst properties. The Australian Square Kilometre Array Pathfinder (ASKAP) has localised 11 FRBs with sub-arcsecond to arcsecond precision, leading to sub-galaxy localisation regions in some cases and those covering much of the host galaxy in others. The method used to astrometrically register the FRB image frame for ASKAP, in order to align it with images taken at other wave
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20

Wang, Ziteng, Tara Murphy, David L. Kaplan, Keith W. Bannister, and Dougal Dobie. "The capability of the Australian Square Kilometre Array Pathfinder to detect prompt radio bursts from neutron star mergers." Publications of the Astronomical Society of Australia 37 (2020). http://dx.doi.org/10.1017/pasa.2020.42.

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Abstract We discuss observational strategies to detect prompt bursts associated with gravitational wave (GW) events using the Australian Square Kilometre Array Pathfinder (ASKAP). Many theoretical models of binary neutron stars mergers predict that bright, prompt radio emission would accompany the merger. The detection of such prompt emission would greatly improve our knowledge of the physical conditions, environment, and location of the merger. However, searches for prompt emission are complicated by the relatively poor localisation for GW events, with the 90% credible region reaching hundred
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21

Kozlu, Tolunay, Ebru Karadað Sari, Yeþim Akaydin Bozkurt, and Nevin Kurtdede. "Immunohýstochemýcal staýnýng of cd3, cd79ácy and s-100 on bursa fabrýcýus, thymus and spleen of turkeys (Meleagrýs Gallapavo)." Indian Journal of Animal Research, of (December 15, 2018). http://dx.doi.org/10.18805/ijar.b-863.

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Distribution of CD3, CD79ácy and S-100, immunohistochemically, in the bursa of Fabricius, thymus and spleen has not been reported in turkeys. Therefore, we determined the localisation of anti-CD3 protein antibodies for mature T-lymphocytes, anti-CD79ácy antibodies for B-lymphocytes and anti-S-100 protein antibodies for follicular dentritic cells in the bursa of Fabricius, thymus and spleen, which are the lymphoid organs, in a study sample of turkeys. Triple staining method was applied to demonstrate the general structure. Moreover, in all the organs positive reactions were observed with the CD
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22

Khapko, T., T. Kreilos, P. Schlatter, Y. Duguet, B. Eckhardt, and D. S. Henningson. "Edge states as mediators of bypass transition in boundary-layer flows." Journal of Fluid Mechanics 801 (July 21, 2016). http://dx.doi.org/10.1017/jfm.2016.434.

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The concept of edge states is investigated in the asymptotic suction boundary layer in relation to the receptivity process to noisy perturbations and the nucleation of turbulent spots. Edge tracking is first performed numerically, without imposing any discrete symmetry, in a large computational domain allowing for full spatial localisation of the perturbation velocity. The edge state is a three-dimensional localised structure recurrently characterised by a single low-speed streak that experiences erratic bursts and planar shifts. This recurrent streaky structure is then compared with predecess
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23

Burderi, L., A. Sanna, T. Di Salvo, et al. "GrailQuest: hunting for atoms of space and time hidden in the wrinkle of Space-Time." Experimental Astronomy, August 3, 2021. http://dx.doi.org/10.1007/s10686-021-09745-5.

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AbstractGrailQuest (Gamma Ray Astronomy International Laboratory for QUantum Exploration of Space-Time) is a mission concept based on a constellation (hundreds/thousands) of nano/micro/small-satellites in low (or near) Earth orbits. Each satellite hosts a non-collimated array of scintillator crystals coupled with Silicon Drift Detectors with broad energy band coverage (keV-MeV range) and excellent temporal resolution (≤ 100 nanoseconds) each with effective area $\sim 100 \text {cm}^{2}$ ∼ 100 cm 2 . This simple and robust design allows for mass-production of the satellites of the fleet. This r
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