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GCN Circular 20549

Subject

GRB 170127B: NOT r-band upper limits

Date

2017-01-27T21:08:30Z (7 years ago)

From

Zach Cano at U of Iceland <zewcano@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. 20540Not found
 
 
) 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).