[vsnet-grb-info 19008] GRB 170127B: NOT r-band upper limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Jan 28 06:08:55 JST 2017
TITLE: GCN CIRCULAR
NUMBER: 20549
SUBJECT: GRB 170127B: NOT r-band upper limits
DATE: 17/01/27 21:08:30 GMT
FROM: Zach Cano at U of Iceland <zewcano at gmail.com>
Z. Cano (IAA-CSIC), K. E. Heintz (Univ. Iceland & DARK/NBI), D. Malesani
(DARK/NBI and DTU Space) & R. Tronsgaard (NOT) report on behalf of a
larger collaboration:
We observed the field of short-duration GRB 170127B (Cannizzo et al.; GCN
Circ. 20540) with the 2.5-m Nordic Optical Telescope equipped with ALFOSC,
starting at 19:48:56 UT on 27 January 2017 (4.59 hrs from detection). We
obtained 3x300 s in the r-band. In our co-added image no new object is
detected in the XRT error circle to the following limit:
Filter t-t0 (hr) magnitude (AB)
-------------------------------------------
r 4.73 >23.4
The r-band upper limit is for an isolated point source in the GRB field,
which is calibrated to local Pan-STARRS standards in the field. This upper
limit is not corrected for foreground extinction (E(B-V) = 0.02 mag,
Schlegel et al. 1998).
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