GCN Circular 31785
Subject
GRB 220319A: GRANDMA observations
Date
2022-03-24T14:29:52Z (2 years ago)
From
Marie Anne Bizouard at ARTEMIS/CNRS <marieanne.bizouard@oca.eu>
M. Bizouard (OCA/Artemis), P-A. Duverne (IJCLAB), A. Iskandar (XAO),
D. Datashvili (AbAO), M. Blazek (FZU), D. Turpin (CEA), T. Midavaine (KNC)
S. Antier (OCA/Artemis), I. Tosta eMelo (INFN-LNS), X. F. Wang (TSU/BJP),
J. Zhu (BJP), X. Song (BJP), S. Karpov (FZU), A. Kann (IAA-CSIC),
D. Marchais (KNC), A. Popowicz (KNC), A. Oksanen (KNC), M. Serrau (KNC),
M. Freeberg (KNC),�� A. Klotz (IRAP-OMP), R. Kneip (KNC), E. Broens (KNC),
O. Aguerre (KNC), report�� on behalf of the GRANDMA collaboration:
The GRANDMA telescope network responded to the alert of GRB 220319A
(Page et al.
GCN 31769). The first observations started 14 min after the BAT trigger
time.
No new object was detected within the XRT enhanced error region (Goad et
al. GCN
31771). The observations were��affected by the nearby full Moon and in
some cases
also by Sahara dust.
In the following table we report the preliminary photometry of our
observations.
Upper limits are reported at the 3-sigma limit, in the AB system.
T-T0 (hr)| MJD������ | Observatory| Filter| Upp.Mag.
____________________________________________________
0.23 |59657.746539| KNC-HAN������ |�� Lum���������� | 18.6
0.94 |59657.775880| KNC-HAN������ |�� Lum���������� | 18.7
1.38 |59657.794039| KNC-TJML���� |�� Clear������ | 15.7
2.79 |59657.852604| KNC-T-BRO�� |�� Clear������ | 18.6
2.89 |59657.856921| KNC-K26������ |�� Lumen������ | 18.2
4.01 |59657.903715| KNC-T-CAT�� |�� Blue�������� | 19.4
4.01 |59657.903715| KNC-T-CAT�� |�� Green������ | 19.5
4.01 |59657.903715| KNC-T-CAT�� |�� Red���������� | 18.2
5.47 |59657.964502| KNC-TJMS-PS|�� Lumen������ | 20.0
5.62 |59657.970540| ALi-50�������� |�� Clear������ | 20.1
7.22 |59658.037350| KNC-T-AGU�� |�� Lum���������� | 18.8
10.85|59658.188623| C11FREE������ |�� Rc������������ | 18.7
Most of these observations were performed in the context of the
Kilonova-Catcher
programme (KNC), a professional-amateur collaboration within the GRANDMA
project, and in some��cases��using non-standard filters. The KNC
images��have been
processed using��the MUPHOTEN��pipeline (Duverne et al. 2021) and
photometry was
performed using field��stars��from the PanSTARRS catalogue��as��reference.
GRANDMA is a worldwide coordinated telescope network
(grandma.ijclab.in2p3.fr)
devoted to the observation of transients in the context of multi-messenger
astrophysics (Antier et al. 2020 MNRAS 497, 5518). Kilonova-Catcher (KNC)
is the citizen science program of GRANDMA
(http://kilonovacatcher.in2p3.fr/).