Discovery of 9 ASAS-SN Supernova Candidates, Including 3 in the TESS Field of View

ATel #13891; J. Brimacombe (Coral Towers Observatory), P. Cacella (DogsHeaven Observatory), P. Marples (Leyburn Observatory, Australia), G. George (MGA/WWVSH), G. Masi (Virtual Telescope Project, Ceccano, Italy), P. Vallely, K. Z. Stanek, C. S. Kochanek, C. M. Basinger, Z. Way, S. Bose, 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, Ping Chen (KIAA-PKU), M. Stritzinger, S. Holmbo (Aarhus), R. Cornect (Moondyne Observatory)
on 23 Jul 2020; 20:46 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 Haleakala, Hawaii, "Leavitt" in Fort Davis, Texas, and "Payne-Gaposchkin" in Sutherland, South Africa, we discovered several new transient sources. Properties of these sources, as well as finding charts showing the archival imaging (left) and the follow-up confirmation image (right) are given below:

 
Object                     RA (J2000)     DEC (J2000)  Redshift    Disc. UT Date    Disc. g mag    Approx. Abs. Mag    Offset from Host (") 
ASASSN-20iw  (AT 2020qbt)  06:14:46.980  -63:00:13.99  0.036699    2020-07-21.18    ~17.3          -18.8               9.31 
ASASSN-20iu  (AT 2020pyh)  21:48:05.657  -35:00:22.13  Unk         2020-07-20.90    ~17.4           ---                6.25 
ASASSN-20io  (AT 2020pua)  11:53:44.864  -54:06:19.21  0.022416    2020-07-19.72    ~17.0          -18.8               20.96 
ASASSN-20in  (AT 2020pqe)  22:19:46.678  -56:37:49.42  Unk         2020-07-15.97    ~17.3           ---                8.1 
ASASSN-20im  (AT 2020ppi)  19:13:45.435  -59:18:02.66  0.014637    2020-07-17.74    ~17.5          -16.6               33.17 
ASASSN-20il  (AT 2020pom)  05:03:11.470  -22:48:49.73  0.015841    2020-07-08.19    ~16.2          -18.0               0.85 
ASASSN-20hx  (AT 2020ohl)  17:03:36.541  +62:01:32.36  0.016657    2020-07-10.34    ~16.7          -17.6               0.14 
ASASSN-20ho  (AT 2020nub)  02:03:56.030  -23:18:50.31  0.016558    2020-06-30.11    ~16.8          -17.4               11.6 
ASASSN-20hh  (AT 2020nkm)  11:00:56.725  +10:30:15.70  0.036272    2020-06-24.77    ~17.0          -19.1               4.7 

We note that ASASSN-20hk, ASASSN-20hx, and ASASSN-20iw were observed by TESS at the time of their discovery. Follow-up observations of these events are particularly encouraged.

ASAS-SN is currently operating at limited capacity, as some observing sites have been closed in response to the Covid-19 pandemic. 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 grants AST-1515927 and AST-1908570, 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.