GCN Circular 22113
Subject
GRB 171010A: afterglow and SN 2017htp optical observations
Event
Date
2017-11-09T15:51:55Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO), E. Klunko
(ISTP), I. Reva (Fesenkov Astrophysical Institute), A. Kusakin
(Fesenkov Astrophysical Institute), O. Burhonov (UBAI), A. Volnova (IKI)
report on behalf of larger GRB follow-up collaboration:
We observed the field of the Fermi-LAT GRB 171010A (Omodei et al., GCN��
21985) with Zeiss-1000 telescope (TSHAO), AZT-33IK telescope (Mondy),
ZTSH2.6m telescope (CrAO) and AZT-22 telescope (Maidanak).
Within the enhanced Swift-XRT circle (D'Ai et al., GCN 21989) we clearly
detect the optical afterglow (Thorstensen & Halpern , GCN 21987; Izzo &
D. Malesani, GCN 21988; Guidorzi et al., GCN 21991; Malesani et al., GCN
22000; Harita et al., GCN 22001; Kankare et al., GCN 22002; Breeveld &
Siegel, GCN 22004; Watson et al., GCN 22011; Kumar et al., GCN 22012).
Still not all data received and we report some preliminary photometry
of the afterglow in earlier epochs and host+OT in R-filter:
Date�������� �� UT_start �� t-T0 �������� OT �� �� Err.������ Up.Lim. Telescope
���������������� ��(mid, days)���� �� �� ���������������������������������� (3 sigma)
2017-10-12 20:11:03 2.11360 19.06 0.04 22.4 Zeiss-1000
2017-10-13 18:34:36�� 3.00616���� ��19.21�� 0.05���� ��22.2 AZT-33IK
2017-10-14 18:23:31�� 3.99492���� ��19.38�� 0.03���� ��23.1 AZT-33IK
2017-10-15 18:23:04 �� 4.99461���� ��19.35�� 0.03���� ��23.0 AZT-33IK
2017-10-20 00:57:51 9.26249 19.60 0.03 23.4 ZTSH2.6
2017-10-28 19:42:20 18.04966 19.50 0.06 22.8 AZT-33IK
2017-11-06 19:44:54 27.07226 20.00 0.10 21.4 AZT-22
The photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id R2
0795-0045061 15.10
0795-0045035 17.25
0795-0045066 16.59
A light curve of the OT+host can be found in
http://grb.rssi.ru/GRB171010A/GRB171010A_light_curve_R.png
As can be seen from the light curve we can support discovery of SN
2017htp (de Ugarte Postigo et al., GCN 22096; Cucchiara et al., GCN 22107).
We will update the LC as more data becomes available.