Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Robinson, C. R."'
Autor:
Harmon, B. A., Fishman, G. J., Wilson, C. A., Paciesas, W. S., Zhang, S. N., Finger, M. H., Koshut, T. M., McCollough, M. L., Robinson, C. R., Rubin, B. C.
Publikováno v:
Astrophys.J.Suppl. 138 (2002) 149-184
An Earth orbiting detector sensitive to gamma ray photons will see step-like occultation features in its counting rate when a gamma ray point source crosses the Earth's limb. This is due to the change in atmospheric attenuation of the gamma rays alon
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109069
The Burst and Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory has been shown to be sensitive to non-transient hard X-ray sources in our galaxy, down to flux levels of 100 mCrab for daily measurements, 3 mCrab for integrations
Externí odkaz:
http://arxiv.org/abs/astro-ph/9811112
Autor:
McCollough, M. L., Robinson, C. R., Zhang, S. N., Harmon, B. A., Paciesas, W. S., Dieters, S., Phengchamnan, S., Hjellming, R. M., Rupen, M., Mioduszewski, A. J., Waltman, E. B., Ghigo, F. D., Pooley, G. G., Fender, R. P., Cui, W., Trushkin, S.
Cyg X-3 is an unusual X-ray binary which shows remarkable correlative behavior between the hard X-ray, soft X-ray, and the radio. We present an analysis of these long term light curves in the context of spectral changes of the system. This analysis w
Externí odkaz:
http://arxiv.org/abs/astro-ph/9811046
Autor:
McCollough, M. L., Robinson, C. R., Zhang, S. N., Harmon, B. A., Hjellming, R. M., Waltman, E. B., Foster, R. S., Ghigo, F. D., Briggs, M. S., Pendleton, G. N., Johnston, K. J.
Using CGRO/BATSE hard X-ray (HXR) data and GHz radio monitoring data from the Green Bank Interferometer (GBI), we have performed a long term study ($\sim$ 1800 days) of the unusual X-ray binary Cyg X-3 resulting in the discovery of a remarkable relat
Externí odkaz:
http://arxiv.org/abs/astro-ph/9810212
Autor:
McCollough, M. L., Robinson, C. R., Zhang, S. N., Harmon, B. A., Paciesas, W. S., Dieters, S. W., Hjellming, R. M., Rupen, M., Mioduszewski, A. J., Waltman, E. B., Ghigo, F. D., Pooley, G. G., Fender, R. P., Cui, W., Trushkin, S.
Publikováno v:
New Astron.Rev. 42 (1998) 629-632
In the period between May 1997 and August 1997 a series of pointed RXTE observations were made of Cyg X-3. During this period Cyg X-3 made a transition from a quiescent radio state to a flare state (including a major flare) and then returned to a qui
Externí odkaz:
http://arxiv.org/abs/astro-ph/9809389
Autor:
Kippen, R. M., Briggs, M. S., Kommers, J. M., Kouveliotou, C., Hurley, K., Robinson, C. R., van Paradijs, J., Hartmann, D. H., Galama, T. J., Vreeswijk, P. M.
Publikováno v:
ApJ Lett. 506: L27-L30
The recent discovery of a supernova (SN 1998bw) seemingly associated with GRB~980425 adds a new twist to the decades-old debate over the origin of gamma-ray bursts. To investigate the possibility that some (or all) bursts are associated with supernov
Externí odkaz:
http://arxiv.org/abs/astro-ph/9806364
Autor:
Galama, T. J., Wijers, R. A. M. J., Bremer, M., Groot, P. J., Strom, R. G., de Bruyn, A. G., Kouveliotou, C., Robinson, C. R., van Paradijs, J.
We report on Westerbork 1.4 GHz radio observations of the radio counterpart to $\gamma$-ray burst GRB~970508, between 0.80 and 138 days after this event. The 1.4 GHz light curve shows a transition from optically thick to thin emission between 39 and
Externí odkaz:
http://arxiv.org/abs/astro-ph/9804190
The hard X-ray emission from Cygnus X-1 has been monitored continually by BATSE since the launch of CGRO in April 1991. We present the hard X-ray intensity and spectral history of the source covering a period of more than five years. Power spectral a
Externí odkaz:
http://arxiv.org/abs/astro-ph/9712072
Autor:
Mirabel, I. F., Dhawan, V., Chaty, S., Rodriguez, L. F., Marti, J., Robinson, C. R., Swank, J., Geballe, T.
We report simultaneous observations in the X-ray, infrared, and radio wavelengths of the galactic superluminal source GRS 1915+105. During episodes of rapid disappearance and follow up replenishment of the inner accretion disk evidenced by the X-ray
Externí odkaz:
http://arxiv.org/abs/astro-ph/9711097
Autor:
Garcia, M. R., Callanan, P. J., Moraru, D., McClintock, J. E., Tollestrup, E., Willner, S. P., Hergenrother, C., Robinson, C. R., Kouveliotou, C., van Paradijs, J.
We report on R_c and K band observations of the optical counterpart to GRB 970508 with the Fred Lawrence Whipple Observatory (FLWO) 1.2m telescope. Eleven R_c-band observations were obtained on 1997 May 12, and three on May14. The counterpart clearly
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710346