TY - ICOMM
T1 - IGR J17464-3213 (= H1743-322) is active again
AU - Kuulkers, E.
AU - Chenevez, J.
AU - Altamirano, D.
AU - Alfonso-Garzon, J.
AU - Beckmann, V.
AU - Bird, T.
AU - Brandt, S.
AU - Courvisier, T.
AU - Domingo, A.
AU - Ebisawa, K.
AU - Jonker, P.
AU - Kretschmar, P.
AU - Markwardt, C.
AU - Oosterbroek, T.
AU - Paizis, A.
AU - Sanchez-Fernandez, C.
AU - Wijnands, R.
PY - 2011/4/7
Y1 - 2011/4/7
N2 - The INTEGRAL Galactic bulge (GB) monitoring program observations on UT April 6, 2011, 04:11-07:53 show that IGR J17464-3213 (= H1743-322) started another outburst. The observed JEM-X fluxes are 11 +/- 2 and 26 +/- 4 mCrab in the 3-10 and 10-25 keV energy bands, respectively, while the observed IBIS/ISGRI fluxes are 34 +/- 2 and 57 +/- 3 mCrab in the 18-40 and 40-100 keV energy bands, respectively. The source is clearly in a hard state. Previous GB observations (April 3, 15:13-19:21) did not reveal any significant emission, with JEM-X and IBIS/ISGRI upper limits of about 3 and 10 mCrab (5 sigma), respectively, in the above quoted energy bands. Swift/BAT observations indicate the outburst started around April 5. The source is also seen in the latest RXTE/PCA Galactic Center scan observations at April 6, 18:10: 15+/-1 mCrab (2-10 keV). The last outburst of this source was in Aug/Sep 2010 (ATels #2774, #2781, #2788, #2792, #2797, #2857). We encourage follow-up observations at all wavelengths.
AB - The INTEGRAL Galactic bulge (GB) monitoring program observations on UT April 6, 2011, 04:11-07:53 show that IGR J17464-3213 (= H1743-322) started another outburst. The observed JEM-X fluxes are 11 +/- 2 and 26 +/- 4 mCrab in the 3-10 and 10-25 keV energy bands, respectively, while the observed IBIS/ISGRI fluxes are 34 +/- 2 and 57 +/- 3 mCrab in the 18-40 and 40-100 keV energy bands, respectively. The source is clearly in a hard state. Previous GB observations (April 3, 15:13-19:21) did not reveal any significant emission, with JEM-X and IBIS/ISGRI upper limits of about 3 and 10 mCrab (5 sigma), respectively, in the above quoted energy bands. Swift/BAT observations indicate the outburst started around April 5. The source is also seen in the latest RXTE/PCA Galactic Center scan observations at April 6, 18:10: 15+/-1 mCrab (2-10 keV). The last outburst of this source was in Aug/Sep 2010 (ATels #2774, #2781, #2788, #2792, #2797, #2857). We encourage follow-up observations at all wavelengths.
KW - Transient
KW - Variables
KW - Binary
KW - Black Hole
KW - X-ray
M3 - Net publication - Internet publication
T3 - The Astronomer's telegram
ER -