Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005atel..447....1g&link_type=abstract
The Astronomer's Telegram, #447
Astronomy and Astrophysics
Astronomy
4
Radio, Infra-Red, Optical, X-Ray, Request For Observations, Black Holes, Transients
Scientific paper
Two next sets of INTEGRAL deep Galactic center field observations (on March 26.104-26.778 and 28.054-28.464, 2005 UT) showed that IGR J17098-3628 (ATEL #444) is strongly evolving in both brightness and spectral shape. The flux measured during these sets was equal to 57.1+/-1.5 and 40.1+/-2.5 mCrab in the 18-45 keV band and 55.4+/-3.1 and 16.6+/-4.6 mCrab in the 45-80 keV band. Comparison with the flux values given in ATEL #444 points on the steady softening of the source X-ray spectrum.
Grebenev Sergei A.
Molkov S. V.
Revnivtsev Mikhail G.
Sunyaev Rashid A.
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