DRAFT
2025-12-15 19:50:37
Type: Announcement-Campaign/Survey
Bibcode: 2025TNSAN.337....1Q
Planned HST observations of SN 2025afcr
Authors: R. Quimby, S. Gomez, A. Fruchter, and T. Moriya on behalf of a larger collaboration

Following the discovery and classification of SN 2025afcr as a superluminous supernova (AstroNote 2025-333), we have triggered Hubble Space Telescope observatons under the "HST Superluminous Supernova UV Legacy Program" (GO-18105; PI=Quimby). Two epochs of FUV/NUV spectroscopy will be obtained. The first epoch includes COS observations starting around Dec. 19, 2025 13:27 (UT) and STIS observations starting around Dec. 20, 2025 12:57 (UT). The second epoch, currently in the planning phase, is expected at the end of the month. We encourage simultaneeous follow-up observations at all wavelengths.

We thank the STScI staff, especially T. Royle, M. Siebert, and A. Payne, for scheduling these HST observations.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025afcr 12:38:41.774 +07:36:37.68 SLSN-I 0.1335 12:38:41.774 +07:36:37.68 SLSN-I 0.1335
AstroNote Publication Timestamp Title Authors
2025-333 2025-12-03 18:33:27 Liverpool Telescope and P200 classification of 2025afcr as a bright, pre-maximum SLSN-I at z = 0.1335 Jacob Wise (LJMU), Ragnhild Lunnan (OKC), Steve Schulze (CIERA), Lin Yan (Caltech), Christoffer Fremling (Caltech), Wynn Jacobson-Galan (Caltech), Kaustav Das (Caltech), Daniel Perley (LJMU), Zoe McGrath (LJMU), Jesper Sollerman (OKC), Seán Brennan (OKC), Anna Ho (Cornell), Aleksandra Bochenek (LJMU), K-Ryan Hinds (Caltech)

Comments