GCN Circular 40647
Subject
EP-WXT trigger 01709178069: confirmation of a stellar flare by BOOTES-6 & BOOTES-7
Date
2025-06-07T11:28:27Z (21 hours ago)
From
I. Perez-Garcia at Institute of Astrophysics of Andalusia <ipg@iaa.es>
Via
Web form
I. Perez-Garcia, S.-Y. Wu, A. J. Castro-Tirado, E. J. Fernandez-Garcia, M.D. Caballero-Garcia, S. Guziy, G. Garcia-Segura, R. Sanchez-Ramirez (IAA-CSIC), Y.-D. Hu (INAF-OAB), C. Perez del Pulgar, A. Castellon, I. Carrasco (Univ. de Malaga), L. Hernandez-Garcia (Univ. de Valparaiso), M. Gritsevich (Univ. of Helsinki), D.-R. Xiong (Yunnan Observatories of CAS), B.-B. Zhang (Nanjing Univ.) and A. Maury (Space, San Pedro de Atacama), on behalf of a larger collaboration, report:
Following the detection of trigger 01709178069 by EP-WXT (Hu et al. GCN 40646), both the 0.6m robotic telescopes BOOTES-6/DPRT 0.6m at Boyden Observatory in Maselspoort (South Africa) and BOOTES-7 at San Pedro de Atacama (Chile) responded to the alert on June 7, 23:45 UT (i.e. 2 min after notification and 7 min after the detection). Within the reported EP-FXT error circle we find the star UCAC4 204-077663 decreasing 0.25 mag in brightness (clear filter) during a 30 min time interval. Subsequent observations using the g filter and starting on June 8, 00:23 we find a decrease in 0.7 mag during a 2 hour time interval, confirming the EP X-ray trigger due to a stellar flare.
We thank the staff at San Pedro de Atacama Celestial Observations and Boyden Observatory for their excellent support.