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GCN Circular 32927

Subject

GRB 221110A: COATLI Afterglow detection

Date

2022-11-10T04:49:36Z (a year ago)

From

Emma Margarita Pereyra Talamantes at IA-UNAM Ensenada <mpereyra@astro.unam.mx>

*Margarita Pereyra (UNAM),  Alan M. Watson (UNAM), Nat Butler (ASU), Rosa
Becerra (UNAM), Simone Dichiara (PSU), Tzveti Dimitrova (ASU), Oc��lotl
L��pez (UNAM), Diego Gonz��lez (UNAM), Alexander Kutyrev (GSFC), William H.
Lee (UNAM), Eleonora Troja (UTV/ASU) and report:We observed the field of
the GRB 221110A (Williams et al., GCN Circ. 32925Not found
 
 
) with the COATLI 50-cm
telescope and HUITZI f/8 imager at the Observatorio Astron��mico Nacional on
the Sierra de San Pedro M��rtir (http://coatli.astroscu.unam.mx
<http://coatli.astroscu.unam.mx/>) from 2022-11-10 03:26 UTC to 03:59 UTC
(0.96hrs to 1.5 hours after the trigger), obtaining a total of 29 minutes
of exposure in the r filter.At the position of the UVOT afterglow (Williams
et al., GCN Circ. 32925Not found
 
 
), we detect a source with the following magnitude
and 1-sigma uncertainty:r = 19.7 +/- 0.15Our photometry is calibrated
against the Pan-STARRS1 catalog, is on an approximate AB system, and is not
corrected for Galactic extinction in the direction of the GRB.Observations
and reductions will continue. Further observations are planned.We thank the
COATLI/HUITZI technical team and the staff of the Observatorio Astron��mico
Nacional.*

-- 
*Dr. Margarita Pereyra *

*FFTF, Schlumberger Foundation Alumnae*
----------------------------------------------------------------------------------------------------------------

*Catedr��tica Conacyt*

*Instituto de Astronom��a de la UNAM,*

*Km. 107 Carretera Tijua**na-Ensenada, *

*Ensenada Baja California, M��xico. C.P. 22860*

Oficina: 405

Skype: margarita-pereyra