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Discovery of Several ASAS-SN Supernovae

ATel #10555; J. Brimacombe (Coral Towers Observatory), R. S. Post (Post Astronomy), G. Stone (Sierra Remote Observatories), W. Wiethoff (University of Minnesota, Duluth), J. S. Brown, K. Z. Stanek (Ohio State), Subo Dong (KIAA-PKU), T. W.-S. Holoien, C. S. Kochanek, J. Shields, T. A. Thompson (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), S. Bose, Ping Chen (KIAA-PKU), P. Cacella (DogsHeaven Observatory)
on 3 Jul 2017; 19:27 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Jonathan Brown (brown@astronomy.ohio-state.edu)

Subjects: Optical, Supernovae, Transient

Referred to by ATel #: 10579, 10580, 10591

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 several new transient sources most likely associated with recent supernovae. Properties of the supernovae, as well as figures showing the archival imaging (left) and the follow-up confirmation imaging (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-17in  (AT 2017faw)  21:17:39.640   -44:54:16.85  Unk       2017-06-30.26      16.7            N/A                1.1 
ASASSN-17io  (AT 2017fbh)  13:07:48.797   +62:20:49.80  0.027422  2017-06-26.32      17.4          -17.9                0.5 
ASASSN-17ip  (AT 2017fbj)  08:58:20.056   -65:21:50.72  0.018422  2017-06-29.96      16.9          -18.1               15.4 
ASASSN-17iq  (AT 2017fbp)  03:17:27.838   -00:05:08.66  0.022891  2017-07-01.42      16.8          -18.2               36.5 
ASASSN-17ir  (AT 2017fbr)  15:40:59.650   +51:26:16.06  0.037026  2017-06-25.43      17.3          -18.6                0.5 
ASASSN-17is  (AT 2017fbu)  02:11:06.936   +03:50:36.63  0.010861  2017-07-02.41      16.6          -16.6               36.1 
ASASSN-17it  (AT 2017fby)  01:32:50.071   -12:36:13.47  0.043513  2017-07-01.58      17.1          -19.2                2.2 

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.