Broadband INTEGRAL analysis of IGR J17497-2821
ATel #888; E. Kuulkers (ESA/ESAC, Spain), J. Chenevez (DNSC, Denmark), S. Shaw (Southampton, UK/ ISDC, Switzerland), S. Brandt DNSC, Denmark), T. Courvoisier (ISDC, Switzerland), A. Domingo Garau (LAEFF/INTA, Spain), K. Ebisawa (ISAS, Japan), P. Kretschmar (ESA/ESAC, Spain), C. Markwardt (GSFC, USA), N. Mowlavi (ISDC, Switzerland), T. Oosterbroek (ESA/ESTEC, The Netherlands), A. Paizis (INAF-IASF, Italy),D. Risquez Oneca (LAEFF/INTA, Spain), C. Sanchez-Fernandez (ESA/ESAC, Spain), R. Wijnands (UvA, The Netherlands)
on 20 Sep 2006; 13:10 UT
Credential Certification: Erik Kuulkers (ekuulker@rssd.esa.int)
Subjects: X-ray, Gamma Ray, Binary, Black Hole, Neutron Star, Transient, Variables
Referred to by ATel #: 897
We further analysed the INTEGRAL JEM-X observations performed
on UT 2006, Sep 18, 08:30-12:12 (ATel #886) of the new hard INTEGRAL
source IGR J17497-2821 (ATel #885). We find average fluxes of
31 +/- 10 mCrab and 47 +/- 12 mCrab in the 3-10 keV and
10-25 keV bands, respectively. The best-fit JEM-X position is
RA = 267.405 deg, Dec = -28.356 deg (J2000.0), with a 90% confidence
error of 1', consistent with that reported in ATels #885 and #886.
A joint JEM-X and IBIS/ISGRI spectral analysis shows the 3-200 keV
source spectrum to be well described by a single power-law with index
1.93 +/- 0.05. The 90% confidence upper limit on the absorption column,
N_H, is about 6x10^22 atoms/cm^2, consistent with the average
interstellar absorption in the direction of the source.
At an assumed distance of 8 kpc the 2-10 keV and 2-100 keV (unabsorbed)
source luminosities are about 5x10^36 erg/s and 10^37 erg/s, respectively.
Our observations show IGR J17497-2821 to be in a low, hard, state, typically
seen in black-hole candidate and neutron-star X-ray transients.
