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ATEL #10387 ATEL
#10387
Title: ASAS-SN Discovery of A Likely Galactic Nova ASASSN-17gk on
the Rise
Author: K. Z. Stanek, C. S. Kochanek (OSU), L. Chomiuk, J. Strader
(MSU), J. S. Brown, T. W.-S. Holoien, J. V. Shields, T. A.
Thompson
(OSU), 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)
Queries:
stanek.32@osu.edu
Posted: 18 May 2017; 00:49 UT
Subjects:Optical, Nova
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or
"Assassin"), using data from the quadruple 14-cm "Cassius" telescope in
CTIO, Chile, we detect a very bright, new transient source, most likely a
classical nova, near the Galactic plane
Object RA (J2000) DEC (J2000) Gal l (deg) Gal b (deg)
Disc. UT Date Disc. V mag
ASASSN-17gk 13:20:55.32 -63:42:18.5 306.187 -1.02
2017-05-17.28 10.9
ASASSN-17gk was discovered in images obtained on 2017-05-17.28 at V~10.9,
but it has been present in ASAS-SN data since 2017-04-25.08 (V~13.3), with
significant shorter-timescale variability (V~11.6 on
2017-04-28.11 and V~12.05 on 2017-05-04.19). We do not detect (V>17.4)
this object in subtracted images taken on UT 2017-04-23.16 and before. No
previous outbursts are detected at this location since ASAS-SN started
observing it in February 2016.
Follow-up observations, especially multi-band photometry and spectroscopy,
are strongly encouraged.
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).
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