GCN Circular 31384

Dimple, Ankur Ghosh, Rahul Gupta, Amit Kumar, Amit Ror,  Alaxender Panchal,
Kuntal Misra and S. B. Pandey (ARIES) report:

We carried out the follow-up observations of GRB 220101A (Tohuvavohu, et
al., GCN 31347
Not found
 
 
) using 1.3m Devasthal Fast Optical Telescope (DFOT) at
Devasthal observatory of Aryabhatta Research Institute of observational
sciencES (ARIES), India. The observation was started on  2022-01-01 at
12:45:02 UT. We observed a series of images with an exposure time of 300
seconds in R band covering Swift UVOT position and that provided by other
optical observations (Tohuvavohu et al., GCN 31347
Not found
 
 
; Kuin & Tohuvavohu, GCN
31351
Not found
 
 
; Fu et al., GCN 31353
Not found
 
 
; Hentunen et al., GCN 31356
Not found
 
 
; Perley et al., GCN
31357
Not found
 
 
; de Ugarte Postigo et al., GCN 31358
Not found
 
 
; Fynbo et al., GCN 31359
Not found
 
 
; Vinko
et al., GCN 31361
Not found
 
 
; Tomasella et al., GCN 31363
Not found
 
 
; Mao et al., GCN 31364
Not found
 
 
;
Noschese et al., GCN 31366
Not found
 
 
; Mao et al., GCN 31368
Not found
 
 
; Guelbenzu et al., GCN
31370
Not found
 
 
; Strausbaugh et al., GCN 31371
Not found
 
 
). An uncataloged source is clearly
visible at the location of the burst with a magnitude of 18.19+-0.15 in the
R-band at around 7.73 hours after the burst.

Photometry is done based on the USNO-B1.0 catalog. The magnitude is not
corrected for Galactic extinction in the direction of the GRB.