[vsnet-grb-info 11752] GRB 120326A: PAIRITEL NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13143
SUBJECT: GRB 120326A: PAIRITEL NIR Observations
DATE:    12/03/27 18:22:24 GMT
FROM:    Adam Morgan at U.C. Berkeley  <qmorgan at gmail.com>

A. N. Morgan (UC Berkeley) reports:

We observed the field of GRB 120326A (Siegel et al., GCN 13105) with the
1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at
2012-03-27 09:25:19 UT, ~32.1 hours after the Swift Trigger.  In  mosaics
(effective exposure time of 1.31 hours) taken simultaneously in the J, H,
and Ks filters, we detect a source at the optical afterglow location (Klotz
et al., GCN 13107; LaCluyze et al., GCN 13109; Guidorzi et al., GCN 13111;
Walker et al., GCN 13112; Kuin et al., GCN 13114; Im et al., GCN 13117;
Hentunen et al., GCN 13119; Urata et al., GCN 13121; Zhao et al., GCN
13122; Soulier, GCN 13126; Jang et al., GCN 13139; Quadri et al., GCN
13142).

The preliminary photometry yields:

post burst
t_mid (hr) exp.(hr) filt  mag    m_err
33.58      1.31     J     17.5   0.1
33.58      1.31     H     16.7   0.1
33.58      1.31     Ks    16.0   0.2

All magnitudes are given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
values. Further observations are ongoing.