Discovery of Ten ASAS-SN Supernovae
ATel #11178; J. Brimacombe (Coral Towers Observatory), G. Krannich (Roof Observatory Kaufering), R. A. Koff (Antelope Hills Observatory), G. Stone (Sierra Remote Observatories), P. Vallely, K. Z. Stanek, J. S. Brown, C. S. Kochanek, J. Shields, 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, S. Bose, Ping Chen (KIAA-PKU), P. Cacella (DogsHeaven Observatory)
on 16 Jan 2018; 16:57 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Jonathan Brown (firstname.lastname@example.org)
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 "Brutus" telescope in Haleakala, Hawaii, the quadruple 14-cm "Leavitt" telescope in Fort Davis, Texas, the quadruple 14-cm "Payne-Gaposchkin" telescope in Sutherland, South Africa, and the quadruple 14-cm "Cassius" and "Paczynski" telescopes in Cerro Tololo, Chile, we discovered several new transient sources. Properties of the supernovae and associated finding charts are included in the table below:
Object RA (J2000) DEC (J2000) Redshift Disc. UT Date Disc. V mag Approx. Abs. Mag Offset from Host (")
ASASSN-18ae (AT 2018br) 03:07:52.532 -45:44:22.74 0.062810 2018-01-06.06 ~18.0 -19.2 7.51
ASASSN-18af (AT 2018bs) 03:23:20.738 -22:07:00.67 Unk 2018-01-09.09 ~18.0 --- 6.21
ASASSN-18ag (AT 2018ds) 14:48:53.568 38:46:03.70 0.031610 2018-01-09.46 ~16.9 -18.8 4.12
ASASSN-18ah (AT 2017jfb) 05:28:51.202 -35:44:35.26 Unk 2018-01-09.14 ~17.6 --- 6.02
ASASSN-18aj (AT 2018dx) 09:16:12.286 39:03:42.78 Unk 2018-01-10.21 ~17.3 --- 0.98
ASASSN-18al (AT 2018ep) 11:22:40.763 12:01:31.66 0.039841 2018-01-12.39 ~17.1 -19.2 3.22
ASASSN-18am (AT 2018gk) 16:35:53.908 40:01:58.31 0.031009 2018-01-13.64 ~16.6 -19.0 8.56
ASASSN-18an (AT 2018gl) 09:58:06.110 10:21:33.61 0.017906 2018-01-13.57 ~16.8 -17.8 12.4
ASASSN-18ao (AT 2018gm) 10:21:19.150 20:54:37.33 Unk 2018-01-14.32 ~18.1 --- 0.76
ASASSN-18ap (AT 2018gn) 01:46:42.385 32:30:27.18 0.037503 2018-01-14.12 ~17.7 -18.4 1.77
Follow-up observations are encouraged.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-18xx 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-18xx (AT 2018xyz) to preserve, rather than anonymize, the origin of the transient.
We 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 grant AST-1515927, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics (CCAPP) at OSU, and the Chinese Academy of Sciences South America Center for Astronomy (CASSACA). For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.