TITLE:   GCN CIRCULAR
NUMBER:  41751
SUBJECT: EP#01709240652 (possibly EP250908a): FTW optical and NIR observations
DATE:    25/09/08 23:54:00 GMT
FROM:    Malte Busmann at Ludwig-Maximilians-Universität München <m.busmann@physik.lmu.de>

Malte Busmann (LMU), Xander Hall (Carnegie Mellon U.), Brendan O’Connor (Carnegie Mellon U.), Daniel Gruen (LMU), and Antonella Palmese (Carnegie Mellon U.) report:

We observed the 90% localization of EP/WXT trigger 01709240652 (possibly EP250908a) for 10 x 180 s in the r, i, and J-band simultaneously with the Three Channel Imager (3KK) at the Fraunhofer Telescope at Wendelstein Observatory (FTW). Our observations started at 2025-09-08T21:33:56 (0.23 days after trigger). We performed difference imaging with i-band templates from PS1 and J-band templates from UKIDSS. We do not detect any new sources in the difference images. The mean 3-sigma depth of our J band difference is J > 20.4 AB mag, calibrated against the 2MASS catalog and not corrected for Galactic extinction.

We thank Michael Schmidt from the Wendelstein Observatory for obtaining these observations.