Zobrazeno 1 - 10
of 125
pro vyhledávání: '"H. V. Bradt"'
Publikováno v:
Advances in Space Research. 38:2970-2975
Selected results from the Rossi X-ray Timing Explorer All-Sky Monitor are presented to illustrate the phenomenology of the light curves. The sensitivity to periodic intensity variations is indicated by the folded light curve of AM Her. The gray line
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd2777ffdbaf16a78f32238ac367fab5
https://doi.org/10.1016/j.asr.2005.12.019
https://doi.org/10.1016/j.asr.2005.12.019
Publikováno v:
The Astrophysical Journal. 546:L105-L108
Using data from the All-Sky Monitor (ASM) aboard the Rossi X-Ray Timing Explorer (RXTE), we found that the 1.5-12 keV X-ray count rate of Cygnus X-1 is, on timescales from 90 s to at least 10 days, strongly correlated with the spectral hardness of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16dfe987cbaf1584868237863959f2ed
https://doi.org/10.1086/318862
https://doi.org/10.1086/318862
Autor:
T. Murakami, M. Feroci, H. V. Bradt, Enrico Costa, John Heise, T. Takeshima, N. Kawai, R. M. Kippen, Gordon P. Garmire, G. Stratta, F. E. Marshall, Mario Vietri, Michael R. Garcia, A. Yoshida, L. Piro, Jules P. Halpern, Dale A. Frail, Kevin Hurley, F. Frontera, V. V. Sokolov, Peter Mészáros
Publikováno v:
Science. 290:955-958
We report on the discovery of two emission features observed in the X-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 Dec. 1999 by the Chandra X-Ray Observatory. These features are identified with the Ly$_{\alpha}$ line and the narro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af57f19d31bac825855d518294da8c8a
https://doi.org/10.1126/science.290.5493.955
https://doi.org/10.1126/science.290.5493.955
Autor:
Linqing Wen, D. Frederics, Al Levine, T. L. Cline, J. G. Jernigan, S. Golenetskii, D. Smith, E. P. Mazets, Kevin Hurley, H. V. Bradt, Michael S. Briggs, Ron Remillard
Publikováno v:
The Astrophysical Journal. 526:683-696
The All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer (RXTE) has been used to localize 13 confirmed X-ray counterparts to gamma-ray bursts (GRBs) detected over 3 yr of operation. We quantify the errors in ASM localizations of brief transient s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2722bafcace3c1812e6b0db9ce85a68b
https://doi.org/10.1086/308029
https://doi.org/10.1086/308029
Publikováno v:
The Astrophysical Journal. 525:968-977
We have analyzed over 2 yr of RXTE/All-Sky Monitor data for Cygnus X-1. We have detected the 5.6 day orbital period in Lomb-Scargle periodograms of both light curves and hardness ratios when Cyg X-1 was in the hard state. This detection was made with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6016cdc23ef86a829bba53e88b7fddc
https://doi.org/10.1086/307917
https://doi.org/10.1086/307917
Publikováno v:
The Astrophysical Journal. 519:L147-L150
The fourth unambiguously identified soft gamma repeater (SGR), SGR 1627-41, was discovered with the BATSE instrument on 1998 June 15. Interplanetary Network (IPN) measurements and BATSE data constrained the location of this new SGR to a 6° segment o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::408cee0de3bc6475ebce56d356f0fdae
https://doi.org/10.1086/312121
https://doi.org/10.1086/312121
Autor:
D. Smith, H. V. Bradt, C. R. Robinson, Chryssa Kouveliotou, Toshiaki Takeshima, Marc Kippen, Robert D. Preece, Robin H. D. Corbet, Alan M. Levine, Scott Barthelmy, Azita Valinia, Kevin Hurley, Valerie Connaughton, Ron Remillard, Jean H. Swank, F. E. Marshall
Publikováno v:
Scopus-Elsevier
Variable X-ray sources that appear to be the afterglows of the strong gamma-ray bursts GRB 970616 and GRB 970828 have been discovered with the RXTE PCA. First seen less than 4 hours after the burst, the flux from the sources decreased with time. Alth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ce9d744331cdaeb15c96ab777f162f3
https://doi.org/10.1016/s0920-5632(98)00314-4
https://doi.org/10.1016/s0920-5632(98)00314-4
Publikováno v:
The Astrophysical Journal. 506:374-383
We present Rossi X-Ray Timing Explorer (RXTE) All-Sky Monitor observations of the X-ray binary Circinus X-1 that illustrate the variety of intensity profiles associated with the 16.55 day flaring cycle of the source. We also present eight observation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d65b87ef8ca5539994cbe1fabd1111c5
https://doi.org/10.1086/306247
https://doi.org/10.1086/306247
Publikováno v:
The Astrophysical Journal. 479:L137-L140
A highly coherent 523.92+-0.05 Hz periodic X-ray signal has been observed during a type I X-ray burst from the low-mass X-ray binary system KS 1731-260 with the PCA on RXTE. The spectral evolution of the burst indicates photospheric-radius expansion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ce53764808a0c24fa82101f5600578b
https://doi.org/10.1086/310604
https://doi.org/10.1086/310604
Publikováno v:
The Astrophysical Journal. 469:L21-L24
We have carried out a study of Cir X-1 through (1) detailed sampling over a single 16.5 day intensity cycle with the Rossi X-Ray Timing Explorer (RXTE) proportional counter array and (2) complementary monitoring over six such cycles with the RXTE all
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0faab652f786e0e624bd54666fcf19cb
https://doi.org/10.1086/310264
https://doi.org/10.1086/310264