GCN Circular 19492
Subject
GRB160601A: Gemini Imaging
Date
2016-06-02T15:06:54Z (8 years ago)
From
S. Bradley Cenko at NASA/GSFC <brad.cenko@nasa.gov>
S. B. Cenko (NASA/GSFC), W.-F. Fong (Arizona), A. J. Levan (Warwick), A. Cucchiara (STScI), E. Berger (Harvard), and D. A Perley (DARK) report on behalf of a larger collaboration:
We imaged the location of GRB160601A (Kocevski et al., GCN 19478) with the Gemini Multi-Object Spectrograph (GMOS) mounted on the 8m Gemini North telescope. We obtained a series of 5 x 180 s r-band images beginning at 6:02 UT on 2016 June 2 (~ 15.3 hr after the BAT trigger). The candidate optical afterglow proposed by Malesani et al (GCN 19485; their Source 1) is confirmed to be fading (see also Schulze et al., GCN 19488, Tello et al., GCN 19491). Using nearby point sources from SDSS for calibration, we measure a magnitude of r = 23.69 +/- 0.05 at this time.
We note that the source appears to be (marginally) extended in our GMOS images, and therefore host contamination may to be present in the above magnitude estimate.