2011ATel.3565....1G

Query : 2011ATel.3565....1G

2011ATel.3565....1G - The Astronomer's Telegram, 3565, 1 (2011/August-0)

A new hard X-ray transient discovered by INTEGRAL: IGR J17361-4441.

GIBAUD L., BAZZANO A., BOZZO E., CADOLLE-BEL M., CAPITANIO F., DEL SANTO M., DEN HARTOG P.R., FERRIGNO C., KREYKENBOHM I., PAIZIS A., PUEHLHOFER G., RODRIGUEZ J., SANCHEZ K. and WATANABE C.

Abstract (from CDS):

INTEGRAL discovered a new hard X-ray transient, IGR J17361-4441, during the observations performed from 2011-08-11 22:45 to 2011-08-15 07:39 UTC.

The source is detected in the IBIS/ISGRI mosaic at a preliminary significance level of 8 in the 20-40 keV energy band. The corresponding flux is 7±1 mCrab (68% c.l., only statistical).

The best determined source position is at RA=264.046; DEC=-44.689 (J2000)

with a 90% confinement radius of 3 arcmin. Within the error box, we notice the presence of the globular cluster NGC 6388.

The IBIS/ISGRI spectrum (exposure time 162 ks) can be well described (kh<sup>2</sup><sub>red</sub>/d.o.f.=0.7/9)

by a a power-law with photon index G=2.6<sup>+1.0</sup><sub>-0.7</sub> (90% c.l.). The 20-100 keV flux estimated from the spectral fit is ∼9.7e-11 erg/s/cm2.

Unfortunately, IGR J17361-4441 was located out of the JEM-X field of view.

Follow-up observations are encouraged to unveil the nature of this transient.


Abstract Copyright: ∼

Journal keyword(s): Request for Observations - Globular Cluster - Transient

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 IGR J17361-4441 gam 17 36 17.418 -44 44 05.98           ~ 27 0
2 NGC 6388 GlC 17 36 17.461 -44 44 08.34           ~ 913 1

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