[vsnet-grb-info 5312] GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7002
SUBJECT: GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays 
DATE:    07/10/25 20:40:25 GMT
FROM:    Josh Bloom at UC Berkeley  <jbloom at astron.berkeley.edu>

J. S. Bloom, N. R. Butler, D. A. Perley, D. L. Starr, R. Foley (UC  
Berkeley) report:

"We obtained simultaneous J, H, and Ks band images with fine time  
sampling (7.8s cadence) of the afterglow (Rykoff et al. 6987; Covino  
et al. 6988) of GRB 070125A (Pagani et al. 6986) with PAIRITEL (*)  
beginning ~200s after the BAT trigger.   The beginning of the  
observations coincides with the fading tale of the prompt emission.   
The IR light curve initially rises, then exhibits two prominent peaks  
(at T+~500s and T+~1500s) before fading as a powerlaw t^{-1.5+/-0.1},  
after t ~ 2000s.  A refined data reduction and a search for potential  
color variations are in progress."

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(*) http://pairitel.org


*****************************************************
Joshua Bloom
Assistant Professor, UC Berkeley
601 Campbell Hall, Berkeley, CA 94720
(510) 643-3839 [Office]  447 Campbell
(510) 643-4621 [Lab]      260 Evans
http://astro.berkeley.edu/~jbloom
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