GCN Circular 1190
Subject
GRB011130 (=XRF011130): Further analysis of Chandra Target of
Event
Date
2001-12-12T06:31:30Z (24 years ago)
From
George Ricker at MIT <grr@space.mit.edu>
GRB011130 (=XRF011130): Further analysis of Chandra Target of
Opportunity Observations
G. Monnelly, N. Butler, G. Ricker, P. Ford, R. Vanderspek (MIT); and
D. Lamb (U.Chicago)
on behalf of the Chandra ToO Team and the HETE Science Team
write:
On 10 December, from 00:38 UT - 09:27 UT, the Chandra Observatory
targeted the field of the X-ray rich gamma-ray burst XRF011130 that
was previously localized by the HETE satellite (Ricker et al., GCN
1165). The revised error circle for XRF011130 (Ricker et al. GCN
1178) fits completely within the field-of-view of the ACIS-I array on
Chandra. The observation duration was 30 ksec.
In Ricker et al. (GCN 1185), we reported the locations of the
brightest 10 X-ray sources established in our Chandra observation.
In this Circular, we complete the list of detected sources by
presenting all sources found in the entire ACIS-I detector
field-of-view down to a limit of 10 detected counts, including the
sources presented in GCN Circular #1185. The information for sources
outside the 7.6' radius HETE error circle are presented in a separate
table for clarity. The analysis reported here is based on
wavedetect, whereas GCN 1185 was based on celldetect. The results
are similar: nine of the celldetect sources appear among the top ten
wavedetect sources.
The following table includes all sources above a limit of 10 detected
counts found within the HETE error circle (radius 7.6'). Sources
marked with a * were found by celldetect and distributed in GCN 1185.
Chandra Source ID RA DEC dRA(s) dDEC('') Cts
* CXOU J030527.7+034656 3 5 27.70 3 46 56.46 0.057 1.18 128
* CXOU J030532.3+035139 3 5 32.32 3 51 39.79 0.057 1.18 105
* CXOU J030534.1+034958 3 5 34.08 3 49 58.35 0.057 1.18 37
* CXOU J030514.0+034853 3 5 14.03 3 48 53.56 0.057 1.19 32
* CXOU J030458.5+034702 3 4 58.46 3 47 2.31 0.067 1.28 31
* CXOU J030549.9+035008 3 5 49.88 3 50 8.80 0.058 1.20 28
* CXOU J030541.2+034807 3 5 41.25 3 48 7.26 0.057 1.19 23
* CXOU J030534.1+034208 3 5 34.07 3 42 8.24 0.062 1.33 22
* CXOU J030535.8+035302 3 5 35.83 3 53 2.99 0.058 1.19 20
CXOU J030534.7+035147 3 5 34.68 3 51 47.96 0.057 1.19 18
CXOU J030502.4+034522 3 5 2.44 3 45 22.41 0.071 1.30 18
CXOU J030532.4+034301 3 5 32.44 3 43 1.87 0.062 1.29 17
CXOU J030540.5+034936 3 5 40.45 3 49 36.96 0.057 1.19 15
CXOU J030516.5+035229 3 5 16.48 3 52 29.34 0.059 1.19 14
CXOU J030522.2+035354 3 5 22.21 3 53 54.43 0.059 1.19 14
* CXOU J030512.8+034936 3 5 12.75 3 49 36.22 0.057 1.19 12
CXOU J030530.3+035224 3 5 30.31 3 52 24.48 0.057 1.18 11
CXOU J030532.9+034927 3 5 32.86 3 49 27.94 0.057 1.19 11
CXOU J030537.0+034406 3 5 37.04 3 44 6.95 0.059 1.25 10
CXOU J030501.6+034613 3 5 1.65 3 46 13.94 0.061 1.24 10
The following table includes all sources above a limit of 10 detected
counts found in the ACIS-I field-of-view outside the HETE error
circle (radius 7.6'), but within 10' of the center of the HETE error
circle.
Chandra Source ID RA DEC dRA(s) dDEC('') Cts
CXOU J030539.8+034148 3 5 39.79 3 41 48.82 0.060 1.23 132
CXOU J030454.4+035149 3 4 54.39 3 51 49.41 0.066 1.25 52
CXOU J030519.7+035711 3 5 19.67 3 57 11.99 0.062 1.21 50
CXOU J030539.1+035652 3 5 39.09 3 56 52.21 0.063 1.21 42
CXOU J030529.8+035711 3 5 29.79 3 57 11.93 0.063 1.21 36
CXOU J030537.4+035744 3 5 37.41 3 57 44.79 0.065 1.22 32
CXOU J030538.3+035825 3 5 38.28 3 58 25.95 0.067 1.26 24
CXOU J030453.0+035144 3 4 53.04 3 51 44.28 0.070 1.25 16
CXOU J030602.8+034737 3 6 2.77 3 47 37.64 0.074 1.39 16
CXOU J030529.0+034115 3 5 29.02 3 41 15.90 0.065 1.38 11
The astrometry was calibrated using five USNO A2 catalog stars.
In the table, delta(RA), the uncertainty in RA, and delta(DEC),the
uncertainty in DEC, were established by summing the following in
quadrature for each coordinate: the error reported by wavedetect, the
error reported by the correlation code, and the error estimate from
the star reference catalog.
It is notable that during our Chandra observation there were no
counts detected from within the error circle of the VLA radio source
reported by Berger and Frail (GCN 1173).
Further information about the Chandra observations, including 23
additional sources down to the detection limit of the observation,
can be found on the HETE web page:
http://space.mit.edu/HETE/Bursts/GRB011130.
This message may be cited.