ASASSN-16jj: Discovery of A Supernova in GALEXASC J234711.93+100501.3
ATel #9422; J. Nicolas (Groupe SNAUDE, France), G. Krannich (Roof Observatory Kaufering), G. Masi (Virtual Telescope Project, Ceccano, Italy), J. S. Brown, T. W.-S. Holoien, K. Z. Stanek, C. S. Kochanek, J. Shields (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Subo Dong, S. Bose, Ping Chen (KIAA-PKU), J. Brimacombe (Coral Towers Observatory), P. Marples (Leyburn Observatory, Australia), R. S. Post (Post Astronomy), G. Stone (Sierra Remote Observatories)
on 28 Aug 2016; 18:54 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Jonathan Brown (brown@astronomy.ohio-state.edu)
Subjects: Optical, Supernovae, Transient
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a supernova in the galaxy GALEXASC J234711.93+100501.3.
ASASSN-16jj (AT 2016flu) was discovered in images obtained on UT 2016-08-27.58 at V~17.2 mag. We do not detect (V>16.4) the object in images taken on UT 2016-08-18.37 and before. Images obtained on 2016-08-27 by J. Nicolas, G. Krannich, and G. Masi confirm the discovery of the transient. This figure shows the archival SDSS g-band image of the host (left) and the G. Krannich confirmation image (right). The red circle has a radius of 5" and is centered on the position of the transient in the G. Krannich image.
The position of ASASSN-16jj is approximately 1.6" South and 3.1" West from the center of the galaxy GALEXASC J234711.93+100501.3 (no redshift information available from NED). Follow-up spectroscopy (ATEL #9420) indicates that ASASSN-16jj is a Type Ia SN at an approximate redshift z=0.034 (d=134 Mpc, m-M=35.63, A_V=0.165). 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-16jj 23:47:11.718 +10:04:59.68 2016-08-27.58 17.2 -18.6 3.49
Obs. UT Date V mag
2016-08-18.37 >16.4
2016-08-27.58 17.2
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, and the Mt. Cuba Astronomical Foundation. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.
