IceCube is a 1 km^3 neutrino telescope located at the geographic South Pole sensitive to neutrinos above ~100 GeV. We used the data from IceCube in its 9-string configuration to search for high-energy muon neutrinos from the position of GRB 080319B (Racusin et al., GCN 7427) using an unbinned likelihood method. The search was performed in a narrow time window of 66 s (T_0 - 3.8s to T_0...Full Text

1 Introduction

BAT triggered on GRB 080319B at 06:12:49 UT (Trigger 306757) (Racusin, et al., GCN 7427). This was rate-trigger on a intermediate length burst with T90 > 50 sec. Swift slewed to this burst immediately and XRT began follow-up observations at T + 60.5 sec, and UVOT at T + 51 sec. Our best position is the UVOT-enhanced XRT location (Evans et al., GCN 7449) RA(J2000) = 217.92113deg (14h31m41.07s), Dec(J2000) = +36.30269deg (+36d1809.7) with an uncertainty of 1.4 arcsec (radius, 90% confidence, including boresight uncertainties).

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We have obtained a second epoch of HST observations of GRB 080319B on 11 May 2008. 2 orbits (3200s) of observations were taken in the F606W and F814W filters. The afterglow has clearly faded from our first epoch of observations and a faint host galaxy is now visible at the afterglow location. We measure magnitudes for the combined (afterglow+host) source of; ...Full Text

In light of recent reports on the further evolution of GRB 080319B, we did a preliminary analysis of the multiwavelength data set....Full Text

We obtained a further epoch of observations of GRB 080319B with Gemini-North/GMOS on April 14 UT. These observations yielded the following magnitudes: g=25.80+/-0.09, r=24.93+/-0.07, i=24.22+/-0.05....Full Text

We obtained observations of GRB 080319B (GCN 7427) with HST/WFPC2 in F606W and F814W filters on 2008 April 7th (2 orbits in each filter)....Full Text

We have analyzed the first 19 days of Swift XRT data from GRB 080319B (Racusin et al. GCN 7427), with a total exposure time of 200 ks. The light curve can be fit by a triple broken power-law with initial decay slope of 1.54+/-0.01, breaking at 2790+/-664 s to a slope of 1.85+/-0.05, breaking again at 41.4+/-9.0 ks to a slope of 1.17+/-0.06, and finally breaking at 1.04+/-0.43 Ms to a slope...Full Text

We performed additional analysis of Tortora data on early optical transient of GRB 080319B (GCN 7427, Racusin et al.) reported by us in GCN 7502 and found the systematic error of 6.1 s in the time zero point. To compensate it, all data points have to be shifted 6.1 s to earlier times. The modified light curve, also including minor photometric adjustments, is available at...Full Text

We have continued to monitor the optical afterglow of GRB 080319B from Gemini-South. Additional images were taken on UT March 21, 25, and 28. Despite the presence of the Moon and low elevation of the target, the afterglow remains detected in all filters. We report on photometry, calibrated to SDSS DR6, as follows (including an improved analysis of images obtained on UT March 20, previously...Full Text

While the field of GRB 080319B has been observed by SDSS, we have also obtained a four-night BVRcIc field calibration using the 35cm robotic telescope at Sonoita Research Observatory. The calibration file has a limiting magnitude around V=16, with good standards brighter than V=11 or so. The file is available at ftp://ftp.aavso.org/public/calib/grb/grb080319b.dat ...Full Text

We observed the afterglow of GRB 080319B (Racusin et al. GCN 7427) with 0.7m telescope of Institute of Astronomy, Kharkiv National Univ. starting on (UT) March 19, 18:20 and continuing to March 20, 02:44. The series consist of continuous observations in R and a few frames were taken in V around (UT) 19:58....Full Text

We have processed the Swift XRT data of GRB 080319B, paying special attention to the possible spectral evolution in the WT mode data (Racusin et al. GCN 7459; cf. Butler GCN 7499). We perform a time-dependent spectral analysis using the method described in (Zhang, Liang & Zhang 2007, ApJ, 666, 1002). Since the early data are strongly affected by photon pile-up, we use a box annulus region...Full Text

We have imaged the field of GRB 080319B (Racusin et al., GCN 7427) with the blue filter (15.8 um) of the IRS peak-up camera on board the Spitzer Space Telescope. Observations consisted of 60 pointings, each with two dithered 30 s cycles, beginning at March 21.81 UT (~ 2.55 d after the burst). At the location of the optical afterglow, we measure a flux density of 35.7 +/- 3.9 uJy....Full Text

"We re-observed the position of the GRB 080319B afterglow at 4.9 GHz with the Westerbork Synthesis Radio Telescope at March 21.84 to 22.03 UT and at March 22.84 to 23.03 UT, i.e. 2.7 and 3.7 days after the burst (GCN 7427)....Full Text

"We observed the field of GRB 080319B (GCN 7427) with the Very Large Array beginning at Mar 21.56 UT. At 4.86 GHz we detect a radio source coincident with the optical afterglow position (GCN 7428) at coordinates (J2000): ...Full Text

We observed GRB 080319B using 40cm Newtonian telescope, SBIG ST-7XMEi CCD camera and R-band Kron-Cousins filter. We found afterglow to be R=20.0+-0.3 mag at 2008.03.20 0.125 UT. Given time is mid-exposure (total exposure: 6.7h). Weather conditions were poor because of clouds and Moon. We used 13 nearby USNO-B1.0 stars to get R magnitude. An aperture photometry package Munipack (http://adsabs.harvard.edu/abs/1998stel.conf...30H)...Full Text

Following GCN 7452 we publish a preliminary light curve of GRB 080319b with reduced temporal resolution (10 frames time binning, 1.3 seconds effective exposure, no gaps between frames). The photometry is performed in instrumental system and calibrated towards the V magnitudes of nearby Tycho2 stars. The light curve is available online at...Full Text

We observed the field of GRB 080319B (GCN 7427, Racusin et al.) with the 152 cm telescope located in Loiano under unfavorable conditions due to the illumination of the full moon. ...Full Text

I have applied our time-dependent pileup correction code (Butler & Kocevski 2007; ApJ, 663, 407) to the XRT spectrum of GRB 080319B (see, Racusin et al., GCN 7459). Although I find similar temporal properties in the afterglow decay to those quoted by the XRT team, I find significantly different spectral properties. Notably, there is no significant evidence for a time-variation in N_H...Full Text

The Swift/UVOT observed the field of GRB 080319B starting 51 s after the BAT trigger (Racusin et al., GCN 7427). We detect the optical afterglow all filters. Preliminary magnitudes are reported below....Full Text