GCN Circular 37993

C. Méndez-Lapido, B. Armas-Chinea, F. Dobrindt, P. Escudero-Coca, G. Fernández-Rodríguez, Á. García Lozano, A. Huertas Ferrer, I. Ortega-Casas, M. Torreiro Martínez, G. Villa (all ULL), S.R. Berlanas (IAC and ULL), and I. Pérez-Fournon (IAC and ULL)

We have used the ATLAS forced photometry server (Shingles et al. 2021, Transient Name Server AstroNote 2021-7) to search for detections of the optical/UV counterpart (Klingler et al, GCN 37956
Not found
 
 
;
Watson et al., GCN 37957
Not found
 
 
; Fernández-Rodríguez et al., GCN 37958
Not found
 
 
; Zheng et al., GCN 37959
Not found
 
 
;
An et al.; GCN 37960
Not found
 
 
; Higuchi et al., GCN 37963
Not found
 
 
; SVOM/VT commissioning team and SVOM JSW, GCN 37965
Not found
 
 
; 
Lin et al., GCN 37966
Not found
 
 
; SVOM/C-GFT team and SVOM JSWG, GCN 37970
Not found
 
 
; Breeveld and Klingler, GCN 37974
Not found
 
 
; and Odeh et al., GCN 37976
Not found
 
 
) of GRB 241030A, detected by Fermi GMB (Fermi GBM team, GCN 37955
Not found
 
 
) and LAT (Pillera et al., GCN 37979
Not found
 
 
), Swift BAT, XRT, and UVOT (Klingler et al., GCN 37956
Not found
 
 
; Beardmore et al., GCN 37962
Not found
 
 
; Breeveld and Klingler, GCN 37974
Not found
 
 
; and Ambrosi et al., GCN 37988
Not found
 
 
),
Konus-Wind (Ridnaia et al., GCN 37982
Not found
 
 
), and SVOM/GRM (SVOM/GRM team and SVOM JSWG, GCN 37972
Not found
 
 
). 


Using the ATLAS (Tonry et al. 2018, PASP 130 064505; Smith et al. 2020, PASP 132 085002) forced photometry server (Shingles et al. 2021, Transient Name Server AstroNote 2021-7) at the position of the Swift UVOT bright optical counterpart (Klingler et al., GCN 37956
Not found
 
 
) reveals three strong detections in the ATLAS cyan filter with magnitudes 17.178 +/- 0.032, 17.258 +/- 0.031, and 17.332 +/- 0.035, at MJDs  60613.335407, 60613.338646, and 60613.344651, respectively, with a clear flux fading in these three epochs.

This work has made use of data from the Asteroid Terrestrial-impact Last Alert System (ATLAS) project. The Asteroid Terrestrial-impact Last Alert System (ATLAS) project is primarily funded to search for near earth asteroids through NASA grants NN12AR55G, 80NSSC18K0284, and 80NSSC18K1575; byproducts of the NEO search include images and catalogs from the survey area. This work was partially funded by Kepler/K2 grant J1944/80NSSC19K0112 and HST GO-15889, and STFC grants ST/T000198/1 and ST/S006109/1. The ATLAS science products have been made possible through the contributions of the University of Hawaii Institute for Astronomy, the Queen’s University Belfast, the Space Telescope Science Institute, the South African Astronomical Observatory, and The Millennium Institute of Astrophysics (MAS), Chile.