Discovery of 11 ASAS-SN Supernova Candidates, Including 4 in the TESS Field of View
ATel #14461; J. Brimacombe (Coral Towers Observatory), B. Nicholls (Mt. Vernon Obs., New Zealand), G. Masi (Virtual Telescope Project, Ceccano, Italy), I. Cruz (Cruz Observatory), W. Wiethoff (University of Minnesota, Duluth), P. Marples (Leyburn Observatory, Australia), G. Krannich (Roof Observatory Kaufering), J. A. Munoz (Universidad de Valencia, Spain), P. Vallely, K. Z. Stanek, C. S. Kochanek, Z. Way, D. Desai, 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, Ping Chen (KIAA-PKU), M. Stritzinger, S. Holmbo (Aarhus), A. Gabuya (Al Sadeem Observatory)
on 16 Mar 2021; 02:05 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 Hawaii, "Leavitt" in Texas, "Payne-Gaposchkin" in South Africa, and "Cassius" and "Paczynski" in Chile, we discovered several new transient sources. Properties of these sources, as well as associated finding charts showing archival imaging (left) and a follow-up confirmation image (right) are included in the table below:
Object RA (J2000) DEC (J2000) Redshift Disc. UT Date Disc. g mag Approx. Abs. Mag Offset from Host (")
ASASSN-21dg (AT 2021foa) 13:17:12.370 -17:15:26.02 0.008386 2021-03-15.45 ~15.9 -17.3 9.91
ASASSN-21df (AT 2021fmr) 03:29:29.699 -49:12:56.35 Unk 2021-03-12.05 ~17.4 --- 4.28
ASASSN-21de (AT 2021fmd) 11:04:37.272 +28:13:40.87 0.029077 2021-03-12.29 ~17.3 -18.3 0.45
ASASSN-21dd (AT 2021flc) 10:55:25.971 +54:46:52.80 0.070096 2021-03-05.32 ~17.7 -19.8 6.82
ASASSN-21db (AT 2021fky) 01:46:01.288 -60:06:52.88 Unk 2021-03-11.02 ~17.0 --- 0.5
ASASSN-21bv (AT 2021dkb) 03:02:32.843 -57:51:37.79 0.017936 2021-02-20.07 ~16.6 -17.8 0.58
ASASSN-21bu* (AT 2021dju) 05:03:30.064 -58:11:50.11 Unk 2021-02-18.94 ~17.8 --- 4.27
ASASSN-21bt (AT 2021dep) 14:04:12.682 +27:37:34.67 0.036805 2021-02-18.37 ~17.0 -19.1 1.13
ASASSN-21bg* (AT 2021clw) 05:51:19.851 -50:34:58.64 Unk 2021-02-10.16 ~16.7 --- 19.87
ASASSN-21az* (AT 2021cag) 06:02:41.919 -59:51:52.66 0.100500 2021-02-06.16 ~17.3 -21.1 0.32
ASASSN-21aw* (AT 2021buu) 08:43:31.336 -26:01:41.75 Unk 2021-02-03.89 ~17.2 --- ---
* in TESS
Follow-up observations are encouraged, particularly of the 4 TESS transients.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-20xx transient names as our primary nomenclature, and we encourage others to do the same. We prefer merging the names as ASASSN-20xx (AT 2020xyz) 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 grant GBMF5490 to the Ohio State University, NSF grants AST-1515927 and AST-1908570, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics (CCAPP) at OSU, the Chinese Academy of Sciences South America Center for Astronomy (CASSACA), and the Villum Fonden (Denmark). For more information about the ASAS-SN project, see the ASAS-SN Homepage.
