Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 34928

Subject
GRB 231024A: GRANDMA observations of AT2023vuc/GOTO23baj candidate
Date
2023-11-02T13:35:29Z (7 months ago)
From
Dalya Akl at American Uni. SHJ <dalyaakl.d@gmail.com>
Via
Web form
D. Akl (AUS), D. Turpin (CEA-Saclay/Irfu), P. Gokuldass (ERAU), R. Strausbaugh (EUI), Z. Vidadi (ShAO), S. Antier, A. de Ugarte Postigo (OCA/Artemis), M. Coughlin (UMN), Q. Andre (OCA), J. Peloton,  P. Hello (IJCLAB),  I. Tosta e Melo (UniCT-DFA), T. Pradier(Unistra/IPHC),  S. Karpov, M. Prouza, M. Mašek, M. Blazek (FZU), A. Klotz (IRAP), A. Takey, M. Ismail, M. Abdelkareem, M. Molham (NRIAG), L. Almeida, L. Fraga, W. Corradi, N. Sasaki (LNA), F. Navarete (NOIRLab/SOAR), M. Freeberg (KNC) on behaf of the GRANDMA and Kilonova-Catcher collaborations:

The GRANDMA and Kilonova-Catcher telescope networks observed the source GOTO23baj/SN2023vuc (Gompertz et al., GCN 34878, Iglesias-López et al, GCN 34881), finally classified as a young supernova (Saccardi et al, GCN 34882). We used Skyportal (Coughlin et al., 2023) for the coordination of our observations.

Observations were conducted from 2023-10-25 17:15:51 to 2023-11-01 03:00:12, ~0.91-7.15 days after the GOTO detection time (midtime ref = 2023-10-24T23:23:27.50 from Gompertz et al., GCN 34878).

In the following table, we report a subset of the preliminary photometry of our observations. Magnitudes are reported in the AB and Vega system depending on the filter set.

T-T0 day|MJD       |Obser.      |Exposure|Filter | Mag +/- err
--------------------------------------------------------------------------
0.91    |60242.886 | Les Makes  |50X120s |   r   | 18.56+/-0.19  (AB)
1.04    |60243.019 | FRAM-CTA-N |76x120s |   V   | 18.51 U.L (Vega)
5.32    |60247.290 | KNC-T11    |17x180s |   Rc  | 18.03+/-0.09 (Vega)
5.92    |60247.889 | KAO        |11x180s |   r   | 18.27+/-0.01 (AB)
5.96    |60247.932 | KAO        |11x180s |   i   | 18.51+/-0.02 (AB)
6.23    |60248.206 | KNC-T11    |17x180s |   Rc  | 18.17+/-0.08 (Vega)
6.81    |60248.793 | KAO        |15x180s |   i   | 18.46+/-0.01 (AB)
6.85    |60248.829 | KAO        |14x180s |   r   | 18.42+/-0.01 (AB)
7.13    |60249.105 | SOAR       |5x75s   |   r   | 18.33+/-0.01 (AB)
7.14    |60249.111 | SOAR       |3x150s  |   i   | 18.37+/-0.01 (AB)
7.14    |60249.117 | SOAR       |3x200s  |   g   | 18.03+/-0.01 (AB)
7.15    |60249.125 | SOAR       |2x120s  |   z   | 18.64+/-0.05 (AB)

Our images were taken under poor conditions and a bright moon. All the data in Sloan filters have been calibrated with respect to the PS1 catalog. Johnson filters have been measured using the Gaia catalog. All the data have been reduced by a single data processing pipeline STDPIPE (Karpov et al., 2022). Please contact us for more information and collaboration on this source.

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 MNRAS497, 5518). Kilonova-Catcher (KNC) is the citizen science program of GRANDMA (http://kilonovacatcher.in2p3.fr/).
Looking for U.S. government information and services? Visit USA.gov