GCN Circular 17289

E. Troja (NASA/GSFC/UMCP), T. Sakamoto (AGU), A. Lien (NASA/GSFC/UMBC),
S. B. Cenko (NASA/GSFC), and N. Gehrels (NASA/GSFC) report:

We observed the field of the transient Swift J123205.1-105602 (Cummings;
GCN 17267
Not found
 
 
) with the Chandra X-ray Observatory beginning on
2015 Jan 09.48 UT (7.83 days post-burst) for a total exposure of 14.9 ks.
At the transient position we detect two X-ray sources within the Swift/XRT
point spread function:

SRCX #1
The first source is located at:

RA(J2000) = 12:32:04.985
Dec(J2000) = -10:56:00.21

with a 90% uncertainty of 0.6 arcsec. This position is consistent with the
XRT position (http://www.swift.ac.uk/xrt_positions/00020464/), the bright
radio source reported by van der Horst et al. (GCN 17286
Not found
 
 
), and the nucleus
of 2MASX J12320498-1056010.
The source is well described by an absorbed power-law with photon index
Gamma=2.3 �� 0.2, and absorption column consistent with the Galactic value
of 3E20 cm^-2 (Kalberla et al. 2005). The observed flux in the 0.5-8.0 keV
energy band is (4.0 �� 0.4)E-13 erg cm^-2 s^-1.

SRCX #2
The second, fainter source is located at:

RA(J2000) = 12:32:05.104
Dec(J2000) = -10:56:02.78

with a 90% uncertainty of 0.6 arcsec. This position is consistent with the
optical source reported by Fong et al. (GCN 17271
Not found
 
 
).
The source is well described by an absorbed power-law with photon index
Gamma=1.8 �� 0.3, and absorption column consistent with the Galactic value
of 3E20 cm^-2 (Kalberla et al. 2005). The observed flux in the 0.5-8.0 keV
energy band is (1.2 �� 0.2)E-13 erg cm^-2 s^-1.

Both sources do not display significant temporal variability during our
observation.

We do not detect any X-ray counterpart at the position of the second radio
source reported by van der Horst et al. (GCN 17286
Not found
 
 
) down to  a limit of
3E-4 cts s^-1 (95% confidence level).


We thank Belinda Wilkes and the entire Chandra staff for approving and
rapidly executing this observation.