TITLE: GCN CIRCULAR NUMBER: 7874 SUBJECT: GRB 080514B: Spectroscopic constraints and probable host galaxy DATE: 08/06/13 16:18:12 GMT FROM: Daniel Perley at U.C. Berkeley D. A. Perley, J. S. Bloom (UC Berkeley), H.-W. Chen (U Chicago), R. J. Foley, A. A. Miller, J. Shiode, J. Brewer, D. Starr, and R. Kennedy (UCB) report: On the night of 2008-06-07 (UT) we observed the location of the Super-AGILE burst GRB 080514B (GCN 7715, Rapisarda et al.) with Keck I / LRIS in g and R filters for 1080s and 960s respectively, starting at 12:53 UT. We detect a source consistent with the afterglow position (de Ugarte Postigo et al., GCN 7719) in both filters. Photometry within a 1.1" radius aperture gives an magnitude (calibrated to three nearby USNO B1.0 stars) of: R = 23.9 +/- 0.2 (t = 24.1 days) Compared to the measurement of Malesani et al. (R = 22.52 at 1.77 days, GCN 7734), this would suggest a decay index of only about alpha = 0.5 were this the GRB afterglow, which is unlikely at such late times. More likely, the source represents a relatively bright host galaxy of this burst. However, analysis of a 2x1200s Gemini-North spectrum using GMOS taken at the afterglow location (offset <0.5" from the host from a comparison from the Gemini i-band acquisition image) 1.9 days after the GRB shows no significant emission or absorption features over the usable spectral range from 4000-6720 Angstroms. The continuum flux extends all the way to 4000 Angstroms without evidence of Lyman-alpha forest absorption, which imposes a redshift constraint of z < 2.3. Further follow-up is encouraged. A colorized image of the field is available at: http://lyra.berkeley.edu/~dperley/080514b/080514b_color.png