1 Revisions

Corrected erroneous BAT fluence exponent given in §2 of GCN 107.11. XRT light curve (Figure 2) is now given in flux units, as opposed to count rate units (given in GCN 107.1).

2 Introduction

At 01:23:25 UT, on November 22, 2007, BAT triggered on GRB 071122 (trigger #297114) (Sta- matikos et al., GCN 7121). This was a long GRB with a T90 of 70 seconds in BAT. Swift slewed immediately allowing for XRT and UVOT follow-up observations at T+146 and T+145 sec- onds, respectively, resulting in the detection of an afterglow candidate in XRT and UVOT. Our best localization is from the XRT afterglow position of RA, DEC (J2000) = 18h 26m 25.31s, 47d 04 30.1 (Evans et al., GCN 7126), with an uncertainty of 1.7 (radius, 90% confidence), which was corroborated by subsequent UVOT detection at RA, DEC (J2000) = 18h 26m 25.38s, 47d 04 30.8 (Brown et al., GCN 7131). Both localizations are consistent with ground based optical obser- vations of a source at coordinates RA, DEC (J2000) = 18h 26m 25.23s, 47d 04 31.3 (Cenko et al., GCN 7125), which lead to an absorption redshift of 1.14 (Cucchiara et al., GCN 7124). The proximity of this GRB to the sun precluded further Swift observation.

...Full Text

"We observed the Swift burst GRB 071122 (GCN 7121) using the VLA at a frequency of 8.46 GHz. The observations were taken at 22.46 UT on 2007, November 24. We detect a radio emission at the P60 afterglow position (GCN 7123, GCN 7125). The flux density at the P60 position is 255 +/- 45 uJy. ...Full Text

Swift/UVOT observed the field of GRB 071122 (trigger #297114) starting 145 s after the BAT trigger (Stamatikos et al., GCN 7121). A faint source is detected in the first white exposure at a position of 18h 26m 25.38s, Dec = +47d 4m 30.8s, consistent with the optical afterglow found by Cenko (GCN 7125) and the revised XRT position (Evans et al., GCN 7126). The afterglow is detected at...Full Text

1 Introduction

At 01:23:25 UT, on November 22, 2007, BAT triggered on GRB 071122 (trigger #297114) (Sta- matikos et al., GCN 7121). This was a long GRB with a T90 of 70 seconds in BAT. Swift slewed immediately allowing for XRT and UVOT follow-up observations at T+146 and T+145 sec- onds, respectively, resulting in the detection of an afterglow candidate in XRT and UVOT. Our best localization is from the XRT afterglow position of RA, DEC (J2000) = 18h 26m 25.31s, 47d 04 30.1 (Evans et al., GCN 7126), with an uncertainty of 1.7 (radius, 90% confidence), which was corroborated by subsequent UVOT detection at RA, DEC (J2000) = 18h 26m 25.38s, 47d 04 30.8 (Brown et al., GCN 7131). Both localizations are consistent with ground based optical obser- vations of a source at coordinates RA, DEC (J2000) = 18h 26m 25.23s, 47d 04 31.3 (Cenko et al., GCN 7125), which lead to an absorption redshift of 1.14 (Cucchiara et al., GCN 7124). The proximity of this GRB to the sun precluded further Swift observation.

...Full Text

MASTER robotic system (http://observ.pereplet.ru) responded to GRB 071122.1 (GRB_TIME is 2007-11-22 01:23:25.62, M. Stamatikos et al., GCN 7121). The first image was at 2007-11-22 01:25:57 UT, 69 s after the GCN notice time and 151 s after the GRB time. These observations were affected by proximity to the full moon. The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0...Full Text

Using the data set from T-239 to T+723 sec from recent telemetry downlinks, we report further analysis of BAT GRB 071122 (trigger #297114) (Stamatikos, et al., GCN 7121). The BAT ground-calculated position is RA, Dec = 276.576, 47.102 deg which is ...Full Text

The GCN Swift XRT position update notice sent at 12:44:49 UT was sent in error during the testing of some software modifications. This message should be disregarded. The best XRT position is still that of GCN 7126. ...Full Text

We have analysed 1.4 ks of Swift XRT data for GRB 071122 (Stamatikos et al. GCN 7121), comprising 125 s in Windowed Timing (WT) mode and 1.3 ks in Photon Counting (PC) mode. The observations started 146 s after the BAT trigger. Using 778 s of overlapping XRT Photon Counting mode and UVOT V-band data, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching...Full Text

In our previous circular (GCN 7123), I incorrectly transcribed the coordinates of the proposed afterglow candidate of GRB 071122. The correct coordinates are (J2000.0): ...Full Text

Starting on 2007 November 22.19 UT we used the GMOS spectrograph on the Gemini North telescope to obtain two spectra of 900 each of the optical afterglow of GRB 071122 (GCN 7121, GCN 7123). The spectrum covers the wavelength range 5900-10000A. We clearly detect absorption features corresponding to MgII doublet, MgI, Ca H&K at a redshift of z=1.14, which we identify as the redshift of the...Full Text

We have imaged the field of GRB 071122 (Stamatikos et al., GCN 7121) with the automated Palomar 60-inch telescope. Observations began at approximately 01:41 UT 22 November (~ 18 min after the burst). Just outside the XRT error circle, we detect a stationary, faint point source not present in the Digital Sky Survey images of the field at coordinates (J2000.0): ...Full Text

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 071122 (Swift trigger 297114; Stamatikos et al., GCN 7121), producing images beginning 8.5 s after the GCN notice time. An automated response took the first image at 01:24:51.5 UT, 85.9 s after the burst, under fair conditions. These observations were affected by proximity to the full moon. We took 10 5-sec, and 30 20-sec...Full Text

At 01:23:25 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 071122 (trigger=297114). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 276.581, +47.063 which is ...Full Text