DRAFT
2025-01-23 10:52:47
Type: Object/s-Data/Analysis
Bibcode: 2025TNSAN..29....1P
AT 2025aaa / BGEM J091754.07-222055.8: a young SN candidate in NGC 2835
Authors: I. Pérez-Fournon, D. Aguado, F. Poidevin (all IAC and ULL), N.C. Sun (UCAS), W. Li, Y. Wang, Z. Niu (all NAOC), J.A. Acosta-Pulido, A. López-Oramas, D. Nespral (all IAC and ULL), F. Acero (CEA Saclay and IAC), D. Cano-Morales, and A.E. Hernández-Díaz (all ULL)
Source Group: SGLF
Abstract:
We report the detection by BlackGEM of the young SN candidate AT 2025aaa / BGEM J091754.07-222055.8 in NGC 2835 (10 Mpc)

Groot et al. (TNS Astronomical Transient Report No. 242114) have reported  the transient AT 2025aaa / BGEM J091754.07-222055.8, discovered by BlackGEMon 2025-01-23 08:15:11 UT at  a magnitude of BG-q = 18.41 +/- 0.04 and with a last non detection by BlackGEM on 2025-01-22 06:50:23 UT with a limiting magnitude of BG-q = 20.98. The fast rise time suggests a young SN. The transient is located in the galaxy NGC 2835(at a metric distance of 10 Mpc, from NED).
 

A finding chart has been reported to TNS by the BlackGEMteam. 
 

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 2025aaa [BGEM J091754.07-222055.8] 09:17:54.074 -22:20:55.86 09:17:54.074 -22:20:55.86

Comments

Ismael
Perez-Fournon

Thu, 01/23/2025 - 11:31

The correct discovery date is

2025-01-23 03:45:53.000 UT.

Hugo
Tranin

Thu, 01/23/2025 - 14:59

This object was reported by mistake.
The object was not detected in the second BlackGEM observation, at 5:05AM the same night, with limiting magnitude 20.2. It was probably a cosmic ray. Apologies for reporting it.