Fifth set of INTEGRAL observations of GX339-4: preliminary spectral fit results
Abstract
We present the results of preliminary spectral fits to the fifth period of 150 ksec public INTEGRAL ToO observations of GX 339-4 (see ATels #980, #986, #1000, #1012, #1029, #1032, #1048), obtained between UT 2007, Mar 29, 04:40 and Mar 31, 01:42. We made joint spectral fits to spectra obtained with the JEM-X (5-20 keV) and IBIS/ISGRI (23-100 keV) instruments. The spectrum continued to soften, as observed in the previous observation (ATel #1032), with a contribution of the disk compared to the power-law emission (see below) of about 74%.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- April 2007
- Bibcode:
- 2007ATel.1050....1C
- Keywords:
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- X-ray;
- Gamma Ray;
- Binaries;
- Black Holes;
- Transients;
- Variables