AstroNote 2025-235

We report the classification of  SN2025qfh discovered by the Large Array Survey Telescope (LAST, Ofek et al. 2023; Ben-Ami et al. 2023), in the northern ULTRASAT deep survey field.

The object was detected within a 16-day period during which LAST observed the northern field of ULTRASAT, from 2025-06-22 to 2025-07-07. 2025qfh was discovered on 2025-07-03. Throughout the 16-days period, the field containing 2025qfh was visited 816 times, including 187 detections. Light curves will be published in the future.

Spectroscopic classification was performed with the DeVeny optical spectrograph on the 4.3-meter Lowell Discovery Telescope (LDT), using the DV2 grating, on the night of 2025 July 7th (MST). The spectrum shows strong and narrow Balmer emission lines, suggesting a Type IIn classification, that was confirmed using Next Generation SuperFit (NGSF; Astronote 2022-191) via the WISeREP (Yaron et al. 2012) web interface.

LAST is a survey telescope array operated by the Weizmann Astrophysical Observatory (https://www.weizmann.ac.il/wao/).

ULTRASAT is a UV satellite that is due to be launched to GEO orbit during late 2027 (https://www.weizmann.ac.il/ultrasat/).

Lowell is a private, non-profit institution dedicated to astrophysical research and public appreciation of astronomy and operates the LDT in partnership with Boston University, the University of Maryland, the University of Toledo, Northern Arizona University and Yale University. The upgrade of the DeVeny optical spectrograph has been funded by a generous grant from John and Ginger Giovale and by a grant from the Mt. Cuba Astronomical Foundation.

The classified object is listed in the Related Objects table below.