GCN Circular 36412

I. Perez-Garcia, E. Fernandez-Garcia, M.D. Caballero-Garcia, R. Sanchez-Ramirez, S. Guziy, S.-Y. Wu and A. J. Castro-Tirado (IAA-CSIC, Granada), Y.-D. Hu (INAF-OAB), D. Hiriart, W. H. Lee (UNAM), I. M. Carrasco-Garcia (SMA), I. H. Park (SKKU), L. Hernandez-Garcia (Univ. de Valparaiso), C. Perez del Pulgar, A. Castellon, A. Reina (Univ. de Malaga), B.-B. Zhang (Nanjing Univ.), A. Maury (Space, San Pedro de Atacama), D. R. Xiong, Y. F. Fan, J. M. Bai, C. J. Wang, Y. X. Xin, and X. H. Zhao (Yunnan Observatories of CAS), on behalf of a larger collaboration, report:

Following the detection of EP240506a by EP-WXT (Li et al., GCNC 36405), several telescopes of the Global BOOTES Network pointed to its position on the sky.

The BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) observed the fast X-ray transient location on May. 7, 07:02 UT (1.08 days after trigger). In the co-added frame (60 x 59 s, clear filter), no source is detected within the error position down to 20.6 mag.

The BOOTES-7 0.6m robotic telescope at San Pedro de Atacama (Chile) also observed the transient position on May, 7 at 07:12 UT (1.09 days after trigger). In the co-added image (60 x 32 s, clear filter), no optical counterpart is detected down to 20.3 mag.

Later on, we also triggered the BOOTES-4/MET 0.6m robotic telescope at Lijiang Astronomical Observatory (China), also resulting on a non-detection. All the above-mentioned upper limits are in agreement with other reports (cf. Aryan et al., GCCN 36408).

We thank the staff at the BOOTES sites for their excellent support.