ar X iv : a st ro - p h / 03 08 21 9 v 1 1 2 A ug 2 00 3 LONG TERM STUDIES OF Z SOURCES WITH HEXTE / RXTE
نویسندگان
چکیده
We have analyzed the long pointed observations of the Z sources in the Rossi X-Ray Timing Explorer (RXTE) public archive to study the high energy emission in those sources. Our analysis is concentrated on the High Energy X–Ray Timing Experiment (HEXTE) waveband, since we are primarily interested in studying the hard X– ray (i.e., E > 20 keV) production in those sources. We give here the preliminary results of this ongoing study. We have found no hard X–ray tails (besides Sco X-1) in our database from any of the From the point of view of HEXTE/RXTE observations shown here, the production of hard X–ray tails in Z sources is a process triggered when special conditions are fulfilled. One of these conditions, as derived from our analysis, is a threshold of ∼ 4 × 10 36 erg s −1 for the luminosity of the source's thermal component.
منابع مشابه
ar X iv : a st ro - p h / 03 08 07 9 v 1 5 A ug 2 00 3 THE 2 MS CHANDRA DEEP FIELD - NORTH
The 2 Ms Chandra Deep Field-North survey provides the deepest view of the Universe in the 0.5–8.0 keV X-ray band. In this brief review we investigate the diversity of X-ray selected sources and focus on the constraints placed on AGNs (including binary AGNs) in high-redshift submm galaxies.
متن کاملar X iv : a st ro - p h / 02 08 13 1 v 1 6 A ug 2 00 2 The 2002 outburst of the microquasar XTE J 1550 - 564
We present results of spectral and timing analysis based on 11 RXTE PCA/HEXTE observations of the microquasar XTE J1550-564 during its last outburst in January 2002. The observed behaviour is comparable to most Black-Hole Candidates in the low/hard state This is unlike the 1998-99 outburst, when it showed a much more complex feature, probably because of the higher luminosity. For each of the 11...
متن کاملar X iv : a st ro - p h / 04 08 13 5 v 1 9 A ug 2 00 4 A Determination of the Chemical Composition of α Centauri A from Strong Lines
متن کامل
ar X iv : a st ro - p h / 00 02 21 9 v 1 1 0 Fe b 20 00 Changes in the long term intensity variations in Cyg X - 2 and LMC X - 3
We report the detection of changes in the long term intensity variations in two X-ray binaries Cyg X-2 and LMC X-3. In this work, we have used the long term light curves obtained with the All Sky Monitors (ASM) of the Rossi X-ray Timing Explorer (RXTE), GINGA, ARIEL 5 and VELA 5B and scanning modulation collimator of HEAO 1. It is found that in the light curves of both the sources, obtained wit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003