TITLE: GCN CIRCULAR NUMBER: 37007 SUBJECT: EP240801a: follow-up observation with LCOGT DATE: 24/08/01 23:07:03 GMT FROM: Ismael Perez-Fournon at Instituto de Astrofisica de Canarias ipf@iac.es
I. Pérez-Fournon, F. Poidevin, D. S. Aguado, J. A. Acosta-Pulido, A. López-Oramas, D. Nespral (IAC and ULL), and F. Acero (CEA Saclay and IAC)
We report on optical follow-up observations of the Einstein Probe fast X-ray transient EP240801a (Zhou et al. GCN 36997).
We observed the field of EP240801a using one of the 1-meter telescopes at the Las Cumbres Observatory node located at Siding Spring Observatory (Australia), with a single 300-sec exposure in SDSS-g band starting on 2024-08-01T16:45:15 (UTC), ~ 7.65 hours after the EP trigger, at an airmass of ~ 2.3. We detect the optical counterpart at the position reported by Fu et al. (GCN 36998) with g = 21.43 +/- 0.2 mag, calibrated with PanSTARRS and not corrected for Galactic extinction.
Detections of the optical counterpart have also been reported by Li et al. (GCN 36999), Zheng et al.(GCN 37000), Aryan et al. (GCN 37002), and An et al.(GCN 37004).
This work makes use of observations from the Las Cumbres Observatory global telescope network (program IAC2024B-004).
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