Discovery of 10 ASAS-SN Supernovae

ATel #12526; J. Brimacombe (Coral Towers Observatory), M. R. Kendurkar (Prince George Astronomical Observatory), G. Masi (Virtual Telescope Project, Ceccano, Italy), S. Kiyota (Variable Star Observers League in Japan), J. A. Munoz (Universidad de Valencia, Spain), 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), G. Bock (Runaway Bay Observatory, Australia), B. Nicholls (Mt. Vernon Obs., New Zealand), J. M. Fernandez (Observatory Inmaculada del Molino), P. Cacella (DogsHeaven Observatory), R. G. Farfan (Uraniborg Observatory, Sevilla, Spain)
on 23 Feb 2019; 16:36 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Patrick Vallely (vallely.7@osu.edu)

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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 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-19dj  (AT 2019azh)  08:13:16.937   +22:38:53.80   0.022346     2019-02-22.03       ~16.3          -18.8              0.22 
ASASSN-19di  (AT 2019azg)  02:04:21.518   -53:28:35.12   Unk          2019-02-22.03       ~17.8           ---               12.03 
ASASSN-19dh  (AT 2019azf)  01:12:31.466   -45:48:49.85   0.030568     2019-02-22.02       ~17.0          -18.5              5.9 
ASASSN-19cy  (AT 2019axf)  16:24:26.434   +82:47:41.70   Unk          2019-02-13.49       ~16.0           ---                --- 
ASASSN-19co  (AT 2019aos)  13:12:38.628   -30:01:23.97   Unk          2019-02-06.20       ~17.5           ---               4.57 
ASASSN-19ci  (AT 2019ano)  08:49:20.663   +11:11:56.69   Unk          2019-02-06.14       ~18.1           ---               4.86 
ASASSN-19cf  (AT 2019amr)  14:16:27.742   -45:25:12.66   0.035908     2019-02-05.35       ~17.3          -19.1              10.18 
ASASSN-19bx  (AT 2019aja)  16:23:08.044   +19:00:20.77   0.036228     2019-02-01.48       ~16.8          -19.3              0.86 
ASASSN-19bs  (AT 2019ahh)  14:02:15.140   +09:46:58.93   0.022549     2019-01-30.09       ~17.4          -17.6              6.49 
ASASSN-19bk  (AT 2019aex)  00:39:15.700   +06:41:18.40   0.038683     2019-01-27.09       ~17.4          -18.7              0.22 

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.