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ASAS-SN Discovery of a Possible LMC Nova ASASSN-17lo

ATel #10701; K. Z. Stanek, C. S. Kochanek, J. V. Shields, T. A. Thompson (OSU), T. W.-S. Holoien, B. J. Shappee (Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), Subo Dong (KIAA-PKU)
on 3 Sep 2017; 16:47 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)

Subjects: Optical, Nova

During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), using data from the quadruple 14-cm "Cassius" telescope in CTIO, Chile, we detect a bright, new transient source, possibly a classical nova (could also be a bright CV), towards the Large Magellanic Cloud

Object       RA (J2000)    DEC (J2000)    Disc. UT Date   Disc. V mag  
ASASSN-17lo  05:12:45.09  -69:57:20.1     2017-09-03.326   15.05  

ASASSN-17lo was discovered in images obtained on UT 2017-09-03.326 at V~15.05, and it is also detected in several earlier epochs, starting at UT 2017-08-29.327 at V~13.9. We do not detect (V>17.6) this object in subtracted images taken on UT 2017-08-20.35 and before.

Using ASAS-SN Sky Patrol light curve interface (Kochanek et al. 2017), we have retrieved aperture photometry time series at the location of ASASSN-17lo in the last 20 days, and the resulting light curve can be seen here. No previous outbursts are detected at the position of ASASSN-17lo since ASAS-SN started observing this location in April 2014.

Follow-up observations, especially 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).