Broadband INTEGRAL analysis of IGR J17497-2821

E. Kuulkers*, J. Chenevez, S. Shaw, D. Brandt, T. Courvoisier, A. D Garau, K. Ebisawa, P. Kretschmar, C. Markwardt, N. Mowlavï, T. Oosterbroek, A. Paizis, D. R. Oneca, C. Sanchez-Fernandez, R. Wijnands

*Corresponding author for this work

Research output: Other contributionNet publication - Internet publicationResearch

Abstract

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
Original languageEnglish
Publication date20 Sep 2006
Publication statusPublished - 20 Sep 2006
SeriesThe Astronomer's telegram
NumberATel #888

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