Discovery of 10 ASAS-SN Supernova Candidates
ATel #12756; J. Brimacombe (Coral Towers Observatory), P. Cacella (DogsHeaven Observatory), J. A. Munoz (Universidad de Valencia, Spain), M. R. Kendurkar (Prince George Astronomical Observatory), W. Wiethoff (University of Minnesota, Duluth), P. Vallely, K. Z. Stanek, 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), M. Stritzinger, S. Holmbo (Aarhus), P. Marples (Leyburn Observatory, Australia)
on 14 May 2019; 15:56 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 a number of new transient sources. Properties of the supernovae, as well as associated finding charts showing the archival imaging (left) and the 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-19mm (AT 2019fcr) 13:33:19.635 +41:12:56.98 0.027236 2019-05-13.46 ~16.9 -18.5 0.28
ASASSN-19mk (AT 2019fcg) 21:30:28.482 -32:36:44.22 Unk 2019-05-12.38 ~17.2 --- 0.99
ASASSN-19mj (AT 2019fcb) 18:30:29.019 +74:07:15.89 0.024757 2019-05-12.32 ~17.5 -17.8 4.13
ASASSN-19mi (AT 2019fbz) 23:30:55.561 -38:00:46.44 0.046489 2019-05-11.14 ~17.8 -18.7 0.41
ASASSN-19mh (AT 2019exy) 23:45:41.962 -38:31:04.67 Unk 2019-05-11.14 ~17.3 --- 0.2
ASASSN-19md (AT 2019ewc) 09:10:37.590 -09:30:10.91 0.054704 2019-05-08.15 ~17.9 -19.1 0.2
ASASSN-19mb (AT 2019etp) 23:57:23.093 +30:59:26.62 0.015621 2019-05-06.62 ~16.7 -17.4 12.62
ASASSN-19ma (AT 2019eto) 09:49:50.634 +12:41:43.12 0.029921 2019-05-07.30 ~17.1 -18.6 0.5
ASASSN-19ls (AT 2019emh) 17:52:57.999 -70:00:03.70 0.057950 2019-05-03.17 ~17.7 -19.5 2.38
ASASSN-19lp (AT 2019ejf) 22:52:29.329 -11:05:25.31 0.025271 2019-05-02.37 ~16.8 -18.4 6.91
Follow-up observations are encouraged.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-19xx 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-19xx (AT 2019xyz) 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 grant AST-1515927, 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 and the list of all ASAS-SN transients.
