[AAVSO-HEN] GRB 090113: LOAO Detection Limits in R, I, z, Y-band

[grb at aavso.org]

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TITLE:   GCN CIRCULAR
NUMBER:  8814
SUBJECT: GRB 090113: LOAO Detection Limits in R, I, z, Y-band
DATE:    09/01/15 06:53:10 GMT
FROM:    Induk Lee at Seoul National U  <pidlee at astro.snu.ac.kr>

Induk Lee, M. Im (Seoul National University, Korea), Y. Urata (ASIAA,
Taiwan; Saitama University, Japan), and T.S. Yoon (Kyungpook National
University, Korea)

We have observed the field of GRB 090113 (Krimm et al. GCN 8804) with 1.0m
telescope at Mt. Lemmon Optical Astronomy Observatory (LOAO) in Arizona. We
took R, I, z, Y-band images beginning at UT 02:00:28 and UT 02:29:47 on
January 14 2009 respectively. On stacked images with 3 x 300 secs exposures
in R and I-band images, no new source was detected.
The starting points of observation and 3 sigma detection limits (5" aperture
mag) are as below.

-------------------------------------------------------------------------------------------------------
Band        Starting point                     exp.             detection
limit
-------------------------------------------------------------------------------------------------------
R             07h 19m 49s after trigger     3x300sec        21.1
I              07h 49m 08s after trigger     3x300sec        20.5
-------------------------------------------------------------------------------------------------------

The detection limit was calibrated by USNO B1.0 stars.
This message may be cited.

-- 
Induk Lee
http://astro.snu.ac.kr/~idlee
PhD. candidate in Astronomy program,
Department of Physics & Astronomy, FPRD,
Seoul National University,
Seoul, 151-747, Korea