GRB 140419A
GCN Circular 16281
Subject
GRB 140419A: Continued Mondy optical observations
Date
2014-05-16T15:49:12Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We continued observation of the Swift GRB 140419A (Marshall et al., GCN
16118) with AZT-33IK telescope of Sayan observatory (Mondy) on Apr.
25-26. We took several images in R-filter with the exposure of 60
seconds. On a stacked image from Apr. 25 we detect the optical afterglow
(Zheng et al., GCN 16119; Guver et al., GCN 16120; Butler et al., GCN
16121; Kuin et al., GCN 16123; Hentunen et al., GCN 16126). On the
stacked frame from Apr. 26 in the Swift/XRT error circle (Osborne et
al., GCN 16124) we do not detect any source.
Details of a photometry are the following:
date UT start t-T0 Filter Exp. OT
(mid, days) (s)
2014-04-25 14:48:25 6.47713 R 90*60 22.81+/-0.17
2014-04-26 14:21:55 7.45841 R 90*60 >21.7 (3 sigma)
The photometry is based on nearby SDSS star, R (gri -> R transformations
by Lupton 2005):
SDSS id R
J082752.69+461357.4 17.381+/-0.018
GCN Circular 16168
Subject
GRB 140419A: Continued Mondy optical observations
Date
2014-04-24T15:28:48Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We continued observation of the Swift GRB 140419A (Marshall et al., GCN
16118) with AZT-33IK telescope of Sayan observatory (Mondy) on Apr.
19-21. We took several images in R-filter. On a stacked image we clearly
detected the optical afterglow (Zheng et al., GCN 16119; Guver et al.,
GCN 16120; Butler et al., GCN 16121; Kuin et al., GCN 16123; Hentunen
et al., GCN 16126). Details of a photometry are the following:
date UT start t-T0 Filter Exp. OT
(mid, days) (s)
2014-04-22 14:49:26 3.45342 R 120*60 22.18 +/- 0.09
The photometry is based on nearby SDSS star, R (gri -> R transformations
by Lupton 2005):
SDSS id R
J082752.69+461357.4 17.381 �� 0.018
GCN Circular 16149
Subject
GRB 140419A, LOAO R-band observations
Date
2014-04-23T12:04:51Z (11 years ago)
From
Changsu Choi at Seoul Nat U <changsu@astro.snu.ac.kr>
Changsu Choi, Myungshin Im (CEOU/SNU), Hyun-Il Sung (KASI), and Yuji Urata
(NCU), on behalf of EAFON
We observed the field of GRB 140419A Swift GRB 140419A (Marshall et al., GCN
16118) in R-band using the 1-m telescope at Mt. Lemmon Optical Observatory
(LOAO) in Arizona, US
We obtained R-band images at two epochs on Apr. 19 and on Apr. 21.
We marginally identify the afterglow in a stacked image for each night.
The photometry is based on R1-mag of USNO-B1 stars in the observed field.
Details of Photometry are below:
date UT(mid time) Filter mag
2014/04/19 07:30:51 R 18.64 +/-0.29
2014/04/21 03:39:38 R 21.43 +/-0.27
We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.
GCN Circular 16141
Subject
GRB 140419A: Mondy optical observations
Date
2014-04-22T14:44:54Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the field of the Swift GRB 140419A (Marshall et al., GCN
16118) with AZT-33IK telescope of Sayan observatory (Mondy) on Apr.
19-21. We took several images in R-filter of 60 s exposure. On stacked
images we clearly detected the optical afterglow (Zheng et al., GCN
16119; Guver et al., GCN 16120; Butler et al., GCN 16121; Kuin et al.,
GCN 16123