Discovery of 11 ASAS-SN Supernova Candidates
ATel #15153; J. Brimacombe (Coral Towers Observatory), B. Nicholls (Mt. Vernon Obs., New Zealand), I. Cruz (Cruz Observatory), A. Gabuya (Al Sadeem Observatory), P. Vallely, K. Z. Stanek, C. S. Kochanek, C. Christy, M. Rizzo Smith, S. Bose, T. A. Thompson (Ohio State), B. J. Shappee (IfA-Hawaii), T. W.-S. Holoien (Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong (KIAA-PKU), M. Stritzinger (Aarhus), P. Pearl (The Gap Observatory, BOSS), R. Cornect (Moondyne Observatory)
on 6 Jan 2022; 17:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Patrick Vallely (vallely.7@osu.edu)
Subjects: Optical, Supernovae, Transient
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), using data from the quadruple 14-cm telescopes "Brutus" in Haleakala, Hawaii, "Leavitt" in Fort Davis, Texas, "Payne-Gaposchkin" in Sutherland, South Africa, and "Cassius" and "Paczynski" in Cerro Tololo, Chile, we discovered several transient sources. Their properties, as well as associated finding charts showing archival imaging (left) and follow-up confirmation (right) are included below:
Object RA (J2000) DEC (J2000) Redshift Disc. UT Date Disc. g mag Approx. Abs. Mag Offset from Host (")
ASASSN-21wl (AT 2021ahmz) 10:34:50.658 +00:40:34.73 0.032035 2021-12-31.41 ~17.1 -18.8 1.24
ASASSN-21wi (AT 2021agvd) 06:02:17.224 -49:40:56.52 Unk 2021-12-29.19 ~17.5 --- 2.09
ASASSN-21wh (AT 2021agrt) 10:05:36.207 +14:33:37.42 0.029862 2021-12-29.44 ~17.6 -18.1 1.17
ASASSN-21wg (AT 2021agpj) 04:31:03.842 -03:24:40.10 0.015221 2021-12-27.33 ~16.0 -18.1 12.84
ASASSN-21wf (AT 2021agmw) 05:14:43.526 -61:11:22.17 0.030718 2021-12-23.04 ~16.9 -18.7 4.04
ASASSN-21we (AT 2021agmv) 23:43:19.401 -72:34:13.88 0.028860 2021-12-23.01 ~16.5 -19.0 10.64
ASASSN-21wa (AT 2021agep) 02:39:10.413 +01:08:36.24 0.020522 2021-12-09.23 ~17.6 -17.1 2.7
ASASSN-21vz (AT 2021agee) 12:59:45.916 -22:10:23.68 0.023173 2021-12-09.35 ~16.8 -18.6 11.17
ASASSN-21vw (AT 2021agdk) 06:01:20.603 -76:53:12.06 Unk 2021-12-07.09 ~17.0 --- 1.52
ASASSN-21vu (AT 2021agcr) 22:31:16.425 -46:28:55.84 0.033530 2021-12-01.79 ~17.5 -18.2 1.03
ASASSN-21vt (AT 2021agcf) 13:36:21.424 -35:06:53.88 0.014156 2021-12-04.35 ~14.9 -19.3 10.68
Follow-up observations are encouraged.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-21xx transient names as our primary nomenclature (including supernovae, but also other classes of transients), and we encourage others to do the same. We prefer merging the names as ASASSN-21xx (AT 2021xyz) to preserve, rather than anonymize, the origin of the transient.
We would like to thank Las Cumbres Observatory and its staff for their continued support of ASAS-SN. ASAS-SN is funded in part by the Gordon and Betty Moore Foundation through grants GBMF5490 and GBMF10501, and also funded in part by the Alfred P. Sloan Foundation grant G-2021-14192. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.
