ASASSN-17lj, 17ll, 17lm: Discovery of Three ASAS-SN Supernova Candidates
ATel #10695; J. Brimacombe (Coral Towers Observatory), R. A. Koff (Antelope Hills Observatory), G. Stone (Sierra Remote Observatories), P. Vallely, K. Z. Stanek, C. S. Kochanek, J. S. Brown, J. Shields, T. A. Thompson (Ohio State), T. W.-S. Holoien, B. J. Shappee (Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong, S. Bose, Ping Chen (KIAA-PKU), R. S. Post (Post Astronomy), S. Kiyota (Variable Star Observers League in Japan)
on 1 Sep 2017; 22:13 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (email@example.com)
Subjects: Optical, Supernovae
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 and the 14-cm "Cassius" telescope in Cerro Tololo, Chile, we
discovered three new transient sources, most likely supernovae. 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. V mag Approx. Abs. Mag Offset from Host (")
ASASSN-17lj (AT 2017gjd) 20:03:44.879 -27:59:17.97 0.020021 2017-08-29.01 ~16.5 -19.8 1.4
ASASSN-17ll (AT 2017glb) 04:51:27.751 -16:57:38.28 0.037092 2017-08-28.62 ~17.1 -19.0 1.6
ASASSN-17lm (AT 2017gkt) 23:36:25.944 +27:23:54.24 0.030464 2017-08-27.35 ~17.1 -18.5 0.8
Follow-up observations are encouraged.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-17xx 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-17xx (AT 2017xyz) 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.