[vsnet-grb-info 5277] GRB 071010B: Fading quickly

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6969
SUBJECT: GRB 071010B: Fading quickly
DATE:    07/10/22 01:03:04 GMT
FROM:    Myungshin Im at Seoul Nat U  <mim at astro.snu.ac.kr>

  M. Im, I. Lee (Seoul National University), and Y. Urata
  (Saitama University) on behalf of the EAFON team:

   Using the Mt. Lemmon (Arizona, US) 1.0m telescope
  operated by the Korea Astronomy Space Science Institute,
  we continued our observation of GRB071010B (GCN 6871,
  Markwardt et al.), beginning at 11:00:20 UT on Oct 21.
  (10.59 days after the burst).
   Now, the optical afterglow (GCN 6873, Oksanen et al.) is very faint,
  and we have only a very marginal detection in our data.
   The faintness of the afterglow further confirms the light curve break
  (GCN6935, Kann et al.; GCN6957, Im, Lee, and Urata, et al.),
  and the GRB is quickly fading.

   Photometry of the object is given below.


  t_start (UT)    Filter    exp (sec)    R-mag   err
-----------------------------------------------------
  Oct. 21,
  11:00:20          R       16x300       23.0    0.6


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