VizieR Online Data Catalog: A VLA study of high-redshift GRBs. II. GRB140304A (Laskar+, 2018)

GRB 140304A was discovered by the Niel Gehrels Swift Observatory Burst Alert Telescope (BAT) on 2014 March 4 at 13:22:31 UT. The Swift X-ray Telescope (XRT) began observing the field at 75.2s after the BAT trigger, leading to the detection of an X-ray afterglow. XRT continued observing the afterglow for 5.3 days in photon counting mode, with the last detection at 3.0 days.

The Swift UV/Optical Telescope (UVOT) observed GRB 140304A beginning 138s after the burst (Marshall & Evans 2014GCN.15920....1M). We analyzed the UVOT data using HEASOFT (v. 6.16) and corresponding calibration files, and we list our derived upper limits in Table 2. We compiled all observations reported in GCN circulars and present the compilation in Table 3.

We observed GRB 140304A with the Combined Array for Research in Millimeter Astronomy (CARMA) beginning on 2014 March 04.02 UT (0.54days after the burst) in continuum wideband mode with 8GHz bandwidth (16 windows, 487.5MHz each) at a mean frequency of 85.5GHz. Following an initial detection (Zauderer+ 2014GCN.15931....1Z), we obtained two additional epochs. We observed the afterglow using the VLA starting 0.45 days after the burst. We detected and tracked the flux density of the afterglow from 1.2 to 33.5 GHz over seven epochs until 89 days after the burst, when it faded beyond detection at all frequencies. We summarize our millimeter-band and VLA observations in Table 4.

(3 data files).