Results 21 to 30 of about 804,926 (346)

GeV Gamma-Ray Sources [PDF]

, 2000
We report on the preliminary extension of our work on cataloging the GeV sky to approximately 7 years of CGRO/EGRET observations with special emphasis on a search for transient sources. The search method and significance levels are presented. Our initial
Lamb, R. C., Macomb, D. J.
core   +1 more source

Calculation and Uncertainty of Fast Radio Burst Structure Based on Smoothed Data

The Astrophysical Journal, 2023
Studies of the time-domain structure of fast radio bursts (FRBs) require an accurate estimate of the FRB dispersion measure in order to recover the intrinsic burst shape.
Adrian T. Sutinjo, Danica R. Scott, Clancy W. James, Marcin Glowacki, Keith W. Bannister, Hyerin Cho, Cherie K. Day, Adam T. Deller, Timothy P. Perrett, Ryan M. Shannon   +9 more
doaj   +1 more source

Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]

, 2001
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link.
Bernado, M. M. Kaufman, Combi, Jorge A., Romero, Gustavo E., Torres, Diego F.   +3 more
core   +2 more sources

A Catalog of Transient X-ray Sources in M31

, 2006
From October 1999 to August 2002, 45 transient X-ray sources were detected in M31 by Chandra and XMM-Newton. We have performed spectral analysis of all XMM-Newton and Chandra ACIS detections of these sources, as well as flux measurements of Chandra HRC ...
Benjamin F. Williams, Cropper M., Garcia M., Greiner J., Hasinger G., Heise J., Kong A., Kong A. K. H., Lewin W. H. G., Massey P., Michael R. Garcia, Negueruela I., Paul J. Callanan, Ramsay G., S. Naik, Shirey R., Trudolyubov S., van den Heuvel E. P. J., Zavlin V. E.   +18 more
core   +2 more sources

A 22-year Southern Sky Survey for Transient and Variable Radio Sources using the Molonglo Observatory Synthesis Telescope

, 2010
We describe a 22-year survey for variable and transient radio sources, performed with archival images taken with the Molonglo Observatory Synthesis Telescope (MOST).
Alcock, Amy, B. M. Gaensler, Ball, Bastian, Becker, Becker, Bignall, Bock, Bode, Bonnarel, Bower, Bower, Burke-Spolaor, Błażejowski, Caldwell, Campbell-Wilson, Campbell-Wilson, Carilli, Chatterjee, Condon, Croft, Croom, Dale, Dressler, Eck, Fender, Fender, Gaensler, Gaensler, Gezari, Gould, Green, Gregory, Hambly, Hankins, Hannikainen, Hopkins, Hopkins, Hunstead, Jakobsson, Jones, K. W. Bannister, Kesteven, Kesteven, Koposov, Kramer, Large, Lenc, Levinson, Lorimer, Lovell, MacFadyen, Manchester, Matsumura, Mauch, Mills, Moshir, Moshir, Murphy, Murphy, Niinuma, Ofek, Perlmutter, R. W. Hunstead, Rickett, Riess, Robertson, S. Chatterjee, Sault, Seielstad, Sokoloski, Stern, Strauss, T. Murphy, Turtle, Voges, Weiler, Wilson, Wright, Wright   +80 more
core   +1 more source

Photohadronic neutrinos from transients in astrophysical sources

Physical Review D, 1998
Significant corrections and changes in presentation, no changes in the result. Symbol table added.
Rachen, Jorg P., Meszaros, P.
openaire   +2 more sources

Transient sources at the highest angular resolution

, 2015
By definition transients are sudden events, some, like supernovae, are catastrophic, while others might be due to recurrent phenomena. The aim of studying transients is to reveal the physical conditions causing them, in this sense ideal targets for ...
Massi, Maria
core   +1 more source

First XMM-Newton Observations of the Globular Cluster M22 [PDF]

, 2001
We have examined preliminary data of the globular cluster, M22, from the EPIC MOS detectors on board XMM-Newton. We have detected 27 X-ray sources within the centre of the field of view, 24 of which are new detections. Three sources were found within the
Asai, Asai, B. Gendre, Bahcall, Briel, Campana, D'Amico, D. Barret, Di Stefano, Djorgovski, Djorgovski, Fox, Grindlay, Grindlay, Harris, Hasinger, Hertz, Hertz, Johnston, Johnston, Kulkarni, Lightman, N. A. Webb, Narayan, Peterson, Piotto, Ramsay, Richman, Ritter, Thorsett, Turner, van der Klis, Verbunt, Verbunt, Verbunt, Verbunt, Verbunt, Zwart   +37 more
core   +2 more sources

Transient X-ray source A1118—61 [PDF]

Nature, 1976
THE transient X-ray source Ariel 1118—61 was discovered late in 1974 (refs 1, 2). It has been suggested3 that this source may be associated with the long period Mira-type variable RS Cen, which is located within the error box for the X-ray source.
P. J. N. DAVISON, P. W. SANFORD
openaire   +1 more source

Simultaneous Multiwavelength Observations of the Repeating Fast Radio Burst FRB 20190520B with Swift and FAST

The Astrophysical Journal
Among several dozen known repeating fast radio bursts, those precisely localized offer the best opportunities to explore their multiwavelength counterparts, which are key to uncovering their origins.
Zhen Yan, Wenfei Yu, Kim L. Page, Jie Lin, Di Li, Chenhui Niu, Casey Law, Bing Zhang, Shami Chatterjee, Xian Zhang, Reshma Anna-Thomas   +10 more
doaj   +1 more source