ASASSN-16jh: Discovery of A Probable Supernova in 2dFGRS S501Z101
ATel #9407; Ping Chen, Subo Dong (KIAA-PKU), K. Z. Stanek, J. S. Brown, T. W.-S. Holoien, C. S. Kochanek, J. Shields, U. Basu (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), S. Bose (KIAA-PKU), J. Brimacombe (Coral Towers Observatory)
on 25 Aug 2016; 11:51 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Subo Dong (firstname.lastname@example.org)
Subjects: Optical, Supernovae
Referred to by ATel #: 9461
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Cassius" telescope in Cerro Tololo, Chile, we discovered a new transient source, most likely a supernova, in the galaxy PGC199416.
ASASSN-16jh (AT 2016fij) was discovered in images obtained on UT 2016-08-25.25 at V~16.8 mag. We also detect the object in images obtained on UT 2016-08-23.24 (V~16.9), UT 2016-08-21.24 (V~17.3), UT 2016-08-19.20 (V~17.0), UT 2016-08-15.18 (V~17.3). We do not detect (V>18.0) the object in images taken on UT 2016-08-14.41 and before. An image obtained on UT 2016-08-25.38 by the LCOGT 1-m telescope at Cerro Tololo confirms the discovery of the transient. This figure shows the archival DSS image of the host (left) and the LCOGT V-band confirmation image (right). The red circle on the archival image has a radius of 5" and is centered on the position of the transient in the LCOGT image.
The position of ASASSN-16jh is approximately 10.2" from the center of the galaxy 2dFGRS S501Z101 (z=0.0389, d=161 Mpc, via NED), giving an absolute V-band magnitude of approximately -19.3 (m-M=36.03, A_V=0.037). Properties of the new source and photometry are summarized in the tables below:
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag Approx. Abs. Mag Offset from Host (")
ASASSN-16jh 00:46:56.316 -33:47:35.59 2016-08-25.25 16.8 -19.3 10.2
Obs. UT Date V mag
Follow-up observations are encouraged.
While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-16xx 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-16xx (AT2016xyz) to preserve, rather than anonymize, the origin of the transient.
We thank LCOGT and its staff for their continued support of ASAS-SN. ASAS-SN is supported by NSF grant AST-1515927, the Center for Cosmology and AstroParticle Physics (CCAPP) at OSU, the Mt. Cuba Astronomical Foundation, George Skestos, and the Robert Martin Ayers Sciences Fund. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.