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IGR J17454-2919: a new X-ray transient found by INTEGRAL/JEM-X close to the Galactic Center

ATel #6530; J. Chenevez, S. Brandt, C. Budtz-Jorgensen, N. Lund, N. J. Westergaard, L. Vandbaek Kroer (DTU Space, Denmark), E. Kuulkers (ESA/ESAC, Spain) and J. Wilms ( Remeis/ECAP/FAU, Germany), on behalf of a larger collaboration
on 3 Oct 2014; 14:14 UT
Credential Certification: Jerome CHENEVEZ (jerome@dsri.dk)

Subjects: X-ray, Transient

Referred to by ATel #: 6574, 6602, 7020, 7096

The JEM-X twin X-ray monitors on board the INTEGRAL satellite have again detected a new X-ray transient during the latest observation of the Galactic Center region. The new source named IGR J17454-2919 is found less than 24 arcmin from the Galactic Center.

The source appears in both JEM-X 3-10 keV and 10-25 keV independent mosaic images of each monitor, obtained from the observations of the Galactic Bulge region and Galactic Center performed during INTEGRAL revolution 1460 between 2014 September 27 UTC 19:00 - 22:42, and from September 28 UTC 03:40 to September 30 UTC 01:44. It was not detected during any previous recent observations of the region leading to a 3-25 keV flux upper limit of 1 mCrab.
The average JEM-X fluxes are 6.5 ±1 mCrab (3-10 keV) and 8.2 ±1.7 mCrab (10-25 keV).
No significant time variation is seen in the source light-curve.

A Swift follow-up observation of 2 ksec exposure has been executed on October 2 between UTC 17:57 and 19:49. Though a PSF-fitted position cannot be obtained the new INTEGRAL source is clearly visible on the XRT image, only 10 arcsec from the JEM-X position, at:
R.A. = 266.366 equivalent to 17h45m28s
Dec. = -29.332 equivalent to -29d19m55s
with a 90% error confidence of 5 arcsec.
The XRT 0.3-10 keV PC-mode count-rate is 0.64 ±0.03 cnt/s.
Further analysis of the Swift data is on-going. We thank the Swift team for having performed this observation of the new transient source.

Multi-wavelength follow-up observations are encouraged to unveil the nature of IGR J17454-2919.