GCN Circular 21932
Subject
GRB 170728B: Kottamia R-band observation
Date
2017-09-27T06:13:52Z (7 years ago)
From
Yasser Hendy at NRIAG <y_hendy_yasser@yahoo.com>
TITLE:���� GCN CIRCULAR
NUMBER: ��
SUBJECT: GRB 170728B: Kottamia R-band observation
DATE:������ 17/09/27 6:09 GMT
FROM:������ Yasser Hendy at NRIAG�� <y_hendy_yasser@yahoo.com>
��
G. B. Ali, Y.H.M. Hendy, A. Takey, N. Essam, and A. Essam
National Research institute of Astronomy and Geophysics, NRIAG, Egypt
report on behalf of the Kottamia collaboration:
We observed the field of the short GRB 170728B: trigger=765130
(Cenko S. B. et al., GCN Circ. 21371) with the 1.88m telescope
of the KAO (Kottamia Astronomical Observatory), Egypt.
The observation was performed in the Rc-band at the Newtonian
camera (F4.8) and started at 2017-07-29 T18:11:19 UT
(~ 19.13 hours (0.8 day) after the burst).
We obtained four images in the Rc-band each one with 600s exposure
time.�� We clearly detected the optical afterglow (D'Avanzo et al., GCN Circ.
21372/21373; Heintz et al., GCN Circ. 21374; Guidorzi et al., GCN Circ. 21375;
Izzo et al., GCN Circ. 21381; Kitaoka et al., GCN Circ. 21387; Watson et al.,
GCN Circ. 21389; Dintinjana et al., GCN Circ. 21394; Volnova et al., GCN Circ. 21419).
We estimate a magnitude Rc 20.625 +/- 0.133, calibrated against nearby
USNO-B1.0 stars:
�� USNO-B1.0������ R2
1601-0108297�� 13.35
1600-0109901�� 13.61
1600-0109913�� 14.08
1601-0108263�� 14.58
1601-0108285�� 14.59
1601-0108292�� 14.71
1601-0108254�� 15.04
1600-0109911�� 15.42
1600-0109861�� 15.52
1601-0108199�� 15.66
1600-0109905�� 15.92
1600-0109885�� 15.97
-Yasser Hendy, on behalf of tthe Kottamia collaboration
��GRB followup team.
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Dr. Yasser Hassan Mohamed�� Mohamed�� Hendy
National Research Institute of Astronomy & Geophysics (NRIAG),
Astronomy Department, 11421 Helwan, Cairo, Egypt.
Phone: +202 25560645���������� Fax: +202 25548020���������� Mobile: +20 1007580213������ +20 1145385285��������
Email: y_hendy_yasser@yahoo.com�� yasserhendy@nriag.sci.eg���� yasserhendy@mail.ru
Homepage:������ NRIAG������������ ResearchGate�������� GoogleScholar���������� Facebook���������� vk
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