[AAVSO-HEN] GRB 070612B: SARA upper limit

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TITLE:   GCN CIRCULAR
NUMBER:  6524
SUBJECT: GRB 070612B: SARA upper limit
DATE:    07/06/12 21:22:00 GMT
FROM:    Adria C. Updike at Clemson U  <aupdike at clemson.edu>

Adria C. Updike, Dieter H. Hartmann (Clemson University), Gary Henson
(ETSU), Robert Mesler, Christina Bunker, and Jason Carson (ETSU/SARA REU
program) report:

Using the 0.9m SARA telescope at Kitt Peak, we imaged the field of GRB 
070612B (GCN 6511, Grupe et al.).  Observations began 24 minutes after 
the trigger (282073) and consisted of 65 minutes of R-band images.

We do not detect any new sources in the refined XRT error box (GCN 6521, 
Grupe et al.) or at the position indicated by P60 (GCN 6517, Cenko et 
al.) down to a limiting magnitude of 20.6 +/- 0.6 in the R-band as 
calibrated relative to 10 USNO B1.0 stars.


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