"We used the Very Large Array to observe the field of view toward GRB 061222B (GCN 5957) at a frequency of 8.46 GHz on 2006 December 23 at 8.11 UT. The peak radio brightness at the XRT position (GCN 5970) is -34 uJy ± 54 uJy....Full Text

We solve technichal problems that prevent to acces to the first trailed image of GRB 061222B obtained with TAROT located at the European Southern Observatory, La Silla observatory, Chile....Full Text

We observed the error box of GRB 061222B (Racusin et al., GCN 5957) with the 3-color 50cm MITSuME Telescope at Akeno, Japan starting at 12:52:28 UT, 8.7 hours after the trigger. In the co-added images of Ic, Rc, and g' bands, we did not detect the afterglow (Berger, GCN 5956). The 3-sigma limiting magnitudes based on USNO-B1.0 (I-band) and NOMAD (R-band,g'-band) stars are following. ...Full Text

Using the data set from T-239.0 to T+903.1 sec from the recent telemetry downlink, we report further analysis of BAT GRB 061222 (trigger #252593) (Racusin, et al., GCN 5957). The BAT ground-calculated position is RA, Dec = RA 105.352, DEC -25.865 deg which is ...Full Text

The Swift/UVOT observed the field of GRB 061222B starting 136 sec after the BAT trigger (GCN 5957). We do not detect the afterglow candidate reported in GCN 5956 in our V band exposures. This is in accordance with the observed redshift of z=3.355 (GCN 5962) for the burst....Full Text

We perfomed optical imaging of the field of GRB 061222B (GCN 5957) at 15:10-15:17 UT 22 Dec. using the TRISPEC attached to the KANATA 1.5-m telescope at Higashi-Hiroshima Observatory, Japan. We obtained 4 R-band images with a 123-s exposure time. The images were calibrated with neighbor stars in the USNO A2.0 catalog (r mag.). ...Full Text

We have analyzed the first two orbits of Swift-XRT data on GRB 061222B (Racusin et al. GCN 5957), with a total exposure of 119 seconds in Window Timing (WT) mode and 906 seconds in Photon Counting (PC) mode. This provides a refined XRT position at RA, Dec = RA 105.35321, DEC -25.8594 which is: ...Full Text

"Following the detection of GRB 061222B by SWIFT (GCN 5957), the field was imaged with the 60-cm BOOTES-IR robotic telescope located at Observatorio de Sierra Nevada (Granada, Spain). Observations were taken in the R-band starting at 04:12:44 U.T. (i.e. 102 s after the onset of the event). On a co-add of several images (30s total time) taken at 04:18:46 (464 s after the GRB trigger), the...Full Text

We imaged the field of GRB 061222B 45 minutes after Swift Trigger 252593 with the SARA 0.9m at Kitt Peak under good weather conditions. We obtained 20 180-second exposures in the R band. We find no fading OT candidate at the position noted by E. Berger (GCN 5956) in the stacked images down to a limiting magnitude of R = 19.0 +/- 0.2 mag (based on calibration to USNO A2.0)....Full Text

We imaged the field of GRB 061222B (Racusin et al. GCN 5957) with the robotic 60-cm REM telescope located at La Silla (Chile). A first set of observations was performed automatically in the optical and near infrared (V,R,I and z', J, H, K bands)....Full Text

"Using several metal absorption features (e.g., SiII, CII, SiIV, etc.) in our first 1800 sec spectroscopic observation we determine a refined redshift for GRB 061222b of z=3.355." ...Full Text

Using the ANDICAM instrument on the 1.3m telescope at CTIO, we obtained optical/IR imaging of the error region of GRB 061222b (GCN 5957, Racusin et al.), with a mid-exposure time of 2006-12-22 04:42:11 UT, which is ~0.5 hours post-burst. Several dithered images were obtained in each filter, with total summed exposure times of 180s in each of BRIYJK and 120s in each of H and V....Full Text

We analyzed carefully the afterglow position provided by Berger GNC Circ. GCN 5956 on TAROT la Silla images. A very faint source is detected only on the first 30s image obtained from 150 to 180 seconds after the trigger....Full Text

We imaged the field of GRB 061222B detected by SWIFT (trigger 252593) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile....Full Text

"Spectroscopic observations of the afterglow (GCN 5956) of GRB 061222b (GCN 5957) with LDSS3 on Magellan reveal a strong continuum break at about 5340A corresponding to Ly-alpha at z~3.4." ...Full Text

At 04:11:02 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 061222B (trigger=252593). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec RA 105.357, DEC -25.855 which is ...Full Text

"We imaged the location of GRB 061222b with LDSS3 on Magellan. Within the XRT error circle we find a bright optical afterglow at: ...Full Text

1 Introduction

BAT triggered on GRB 061222B at 04:11:02 UT (Trigger 252593) (Racusin, et al., GCN 5957). This was a S/N = 10.8 image-trigger on an intermediate length burst with T90 = 40 ± 5 sec. Swift slewed to this burst immediately and XRT began follow-up observations at T + 145 sec, and UVOT at T + 136 sec. Our best position is the XRT location RA(J2000) = 105.35321deg (7h01m24.77s), Dec(J2000) = -25.8594deg (-25d5133.9) with an error of 3.7 arcsec (90% confidence).

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