TITLE:   GCN CIRCULAR
NUMBER:  38060
SUBJECT: EP241101a: OHP/T193 optical observations
DATE:    24/11/03 13:58:27 GMT
FROM:    Christophe Adami at LAM <christophe.adami@lam.fr>

C. Adami (LAM), report on behalf of a larger collaboration:

We observed the field of EP241101a (Liang et al., GCN 38039; Perez-Garcia et al., 
GCN 38047; Lipunov et al., GCN 38049) using the T193cm telescope at Observatoire de 
Haute-Provence (France) equipped with the MISTRAL spectro-imager. 7 exposures were 
obtained in the r-band (7x600s) from 2024 02 November 19:38 UT to 2024 02 November 
20:56 UT (~+20.5h after detection).

The combined frame has a magnitude histogram peaked at r-band=22.1 (AB). The photometric 
calibration was performed using nearby objects from the PanSTARRS catalog and the magnitude 
is not corrected for Galactic extinction.

There is no clear additionnal objects in the MISTRAL image as compared with the PanStarrs 
i-band image (the deepest in PanStarrs). The most appealing candidate present in the MISTRAL 
image and not visible in any of the PanStarrs images is below the MISTRAL magnitude histogram 
peak and is located at RA=02:30:53.09, DEC=22:43:48.11 with a preliminar estimated magnitude
of r-band=22.8+/-0.5. Following MISTRAL observations of this source will be reported.

We acknowledge the excellent support from Observatoire de Haute-Provence, in particular 
Stephane Favard.