TY - ICOMM
T1 - Further INTEGRAL observations of the transient X-ray burster EXO 1745-248
AU - Chenevez, J.
AU - Kuulkers, E.
AU - Alfonso-Garzon, J.
AU - Beckmann, V.
AU - Bird, T.
AU - Bordas, P.
AU - Brandt, S.
AU - Courvoisier, Th.
AU - Santo, M. Del
AU - Domingo, A.
AU - Ebisawa, K.
AU - Ferrigno, C.
AU - Jonker, P.
AU - Kretschmar, P.
AU - Markwardt, C.
AU - Oosterbroek, T.
AU - Paizis, A.
AU - Pottschmidt, K.
AU - Sanchez-Fernandez, C.
AU - Wijnands, R.
PY - 2010/10/11
Y1 - 2010/10/11
N2 - INTEGRAL performed further observations as part of the Galactic Bulge monitoring program (see ATel #438) on 2010 October 11 between (UTC) 02:25 and 06:07. The X-ray source in outburst in the direction of the globular cluster Terzan 5, EXO 1745-248 (ATels #2919, #2920 and #2922), is detected with both JEM-X 1&2, and with IBIS/ISGRI.
A re-analysis of the observations performed on 2010 October 10 from (UTC) 08:45 to 12:26 (ATel #2919), shows that the source was detected in the JEM-X monitor at a position (RA=267.023, DEC=-24.781, with a 90% confidence error of 1 arcmin) consistent with the known X-ray burster EXO 1745-248 (Heinke et al. 2003, ApJ, 590, 809). At that time the flux was 9 +/- 5 mCrab (3-10 keV) and 33 +/-9 mCrab (10-25 keV). The observations on October 11 shows that within a day the flux has increased to 34 +/- 7 mCrab (3-10 keV), 49 +/- 4 mCrab (10-25 keV), 52 +/- 2 mCrab (18-40 keV), and 49 +/- 5 mCrab (40-100 keV).
We detected one type I X-ray burst, on 2010 October 11 06:27, which lasted for about 20 sec. This strengthens EXO 1745-248 to be in outburst, as it is a known (transient) X-ray burster.
AB - INTEGRAL performed further observations as part of the Galactic Bulge monitoring program (see ATel #438) on 2010 October 11 between (UTC) 02:25 and 06:07. The X-ray source in outburst in the direction of the globular cluster Terzan 5, EXO 1745-248 (ATels #2919, #2920 and #2922), is detected with both JEM-X 1&2, and with IBIS/ISGRI.
A re-analysis of the observations performed on 2010 October 10 from (UTC) 08:45 to 12:26 (ATel #2919), shows that the source was detected in the JEM-X monitor at a position (RA=267.023, DEC=-24.781, with a 90% confidence error of 1 arcmin) consistent with the known X-ray burster EXO 1745-248 (Heinke et al. 2003, ApJ, 590, 809). At that time the flux was 9 +/- 5 mCrab (3-10 keV) and 33 +/-9 mCrab (10-25 keV). The observations on October 11 shows that within a day the flux has increased to 34 +/- 7 mCrab (3-10 keV), 49 +/- 4 mCrab (10-25 keV), 52 +/- 2 mCrab (18-40 keV), and 49 +/- 5 mCrab (40-100 keV).
We detected one type I X-ray burst, on 2010 October 11 06:27, which lasted for about 20 sec. This strengthens EXO 1745-248 to be in outburst, as it is a known (transient) X-ray burster.
KW - X-ray
KW - Gamma Ray,
KW - Binary
KW - Globular Cluster
KW - Neutron Star
KW - Transient
M3 - Net publication - Internet publication
T3 - The Astronomer's telegram
ER -