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GCN Circular 40216

Subject

SVOM/sb25042207: BOOTES-2 early optical upper limit

Date

2025-04-23T07:34:37Z (3 days ago)

From

I. Perez-Garcia at Institute of Astrophysics of Andalusia <ipg@iaa.es>

Via

Web form

M. Gritsevich (Univ. of Helsinki), I. Perez-Garcia, M.D. Caballero-Garcia, E. J. Fernandez-Garcia, R. Sanchez-Ramirez, S.-Y. Wu, S. Guziy, and A. J. Castro-Tirado (IAA-CSIC, Granada), Y.-D. Hu (GXU), C. Perez del Pulgar and A. Reina (Univ. of Malaga), R. Fernandez-Munoz (IHSM/UMA-CSIC), and M. Jelinek (ASU-CAS, Ondrejov Obs.), on behalf of a larger collaboration, report:

Following the detection of the X-ray transient sb25042207 by SVOM (Liang et al. GCNC 40213), the 0.6m BOOTES-2/TELMA robotic telescope at IHSM UMA “La Mayora” (Malaga, Spain) automatically responded to this high-energy event starting on Apr 22, 23:38:10 UT (i.e. 2 min after alert). On a coadd (20) of images at 00:00:50 UT (mid exposure time; i.e. 24 min post detection), nothing is detected down to 18.1 mag (clear filter), in agreement with the deeper observations taken later on (Belkin et al., GCNC 40215).

We would like to thank the staff at IHSM-/UMA-CSIC “La Mayora” for their excellent support.