TITLE:   GCN CIRCULAR
NUMBER:  46178
SUBJECT: EP-WXT 01709322274: GOTO observations
DATE:    26/11/06 22:37:16 GMT
FROM:    d.s.oneill@bham.ac.uk

D. O'Neill,  B. P. Gompertz, R. Starling, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

We report on optical observations with the Gravitational-wave Optical Transient Observer (GOTO; Steeghs et al. 2022, Dyer et al. 2024) in response to the EP/WXT alert WXT/01709322274.

Observations covering the localisation area were taken at 2026-11-06 21:48:37 UT, (+0.33h post trigger) with an average 5-sigma depth of L < 20.29 AB mag.

Images were processed immediately after acquisition using the GOTO pipeline (Lyman et al. 2026). Difference imaging was performed using deeper template observations. Source candidates were initially filtered using a classifier (Killestein et al. 2021) and cross-matched against a variety of contextual and minor planet catalogs. Human vetting was carried out in real time on any candidates that passed the above checks.

We detect the flaring star reported by Novotný et al. (GCN 46177) with L = 14.24 +/- 0.002 AB mag, approximately 0.5 mag brighter than its quiescent brightness L~14.75 AB mag. No additional transients that could be credibly associated with WXT01709322274 were detected.

Magnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and not corrected for Galactic extinction.

GOTO (https://goto-observatory.org) is a network of telescopes that is principally funded by the STFC and operated at the Roque de los Muchachos Observatory on La Palma, Spain, and Siding Spring Observatory in NSW, Australia, on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory & Planetarium, the University of Leicester, the University of Sheffield, the National Astronomical Research
Institute of Thailand (NARIT), the University of Turku, the University of Portsmouth, the University of Manchester, the University of Birmingham and the Instituto de Astrofisica de Canarias (IAC).