ASAS-SN Discovery of a Possible, Very Bright Galactic Nova ASASSN-18fv
ATel #11454; K. Z. Stanek (OSU), T. W.-S. Holoien (Carnegie Observatories), C. S. Kochanek, J. V. Shields, T. A. Thompson (OSU), L. Chomiuk, J. Strader (MSU), B. J. Shappee (IfA-Hawaii), J. L. Prieto (Diego Portales; MAS), Subo Dong (KIAA-PKU), M. Stritzinger (Aarhus)
on 21 Mar 2018; 02:04 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Krzysztof Stanek (email@example.com)
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 new transient source,
possibly 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-18fv 10:36:13.7 -59:35:53.9 286.573 -1.088 2018-03-20.32 V<10.0 (saturated)
ASASSN-18fv was discovered in images obtained on UT 2018-03-20.32
at V<10 (saturated). We also detect this transient starting on UT 2018-03-16.32
at V~10.4 (possibly saturated). We do not detect (V>17.0) this object in
subtracted images taken on UT 2018-03-15.34 and before.
We have retrieved V-band image subtraction photometry time series
at the location of ASASSN-18fv. No previous outbursts or variability
are detected at the position of ASASSN-18fv since ASAS-SN started
observing this location in February 2016.
Note that ASASSN-18fv is saturated in ASAS-SN data
(see this image) and also located near a bleeding
column from a nearby, very bright star, so both its position and
ASAS-SN Sky Patrol light curve) are only approximate. However, we have a clear signal of a bright new source on several nights and multiple images, so this
is a secure detection.
Follow-up observations, especially spectroscopy, are strongly encouraged.
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 grant AST-1515927, 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).