[vsnet-outburst 17392] ASASSN-14hi, ASASSN-14hj, ASASSN-14hk (ATEL)
Taichi Kato
tkato at kusastro.kyoto-u.ac.jp
Wed Sep 17 15:39:08 JST 2014
ASASSN-14hi, ASASSN-14hj, ASASSN-14hk (ATEL)
All objects are WZ Sge-type candidates.
ASASSN-14hi --- ------- 18:57:46.67 57:27:14.7 2014-09-16.3 15.18 SDSS DSS VIZIER ------- high amplitude CV candidate caught early, no match in Vizier, V>17.5 on 2014-09-14.30, V=15.2 on 2014-09-16.30
ASASSN-14hi 20140914.30 <175V ASN
ASASSN-14hi 20140916.30 15.18V ASN
ASASSN-14hj --- ------- 21:16:35.73 -7:49:10.6 2014-09-16.11 14.55 SDSS DSS VIZIER ------- bright, large amplitude CV candidate caught very early in two cameras, matches to g=22.4 blue SDSS source, V>17.2 on 2014-09-15.36, V=14.6 on 2014-09-16.11, V=14.4 on 2014-09-16.34
ASASSN-14hj 20140915.36 <172V ASN
ASASSN-14hj 20140916.11 14.55V ASN
ASASSN-14hj 20140916.34 144V ASN
ASASSN-14hk --- ------- 1:39:35.67 35:38:40.7 2014-09-16.6 14.61 SDSS DSS VIZIER ------- discovered in images taken on UT 2014-09-16.61 at V=14.7, but not present (V>16.7) in images taken on UT 2014-09-14.43; Vizier reports a match to a faint, B=20.8 USNO-B1.0 source, and also a nearby GALEX NUV=21.9 source
ASASSN-14hk 20140914.43 <167V ASN
ASASSN-14hk 20140916.61 14.61V ASN
==============================================================================
ATEL #6479 ATEL #6479
Title: ASAS-SN Discovery of Three Bright, Large Amplitude CV Outbursts
Caught Early
Author: K. Z. Stanek, C. S. Kochanek, A. B. Davis, T. W.-S. Holoien,
U. Basu, J. F. Beacom (Ohio State), B. J. Shappee (Hubble Fellow,
Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier
(LJMU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G.
Pojmanski (Warsaw University Observatory)
Queries: stanek.32 at osu.edu
Posted: 16 Sep 2014; 18:26 UT
Subjects:Optical, Cataclysmic Variable
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or
"Assassin"), using data from both the quadruple 14-cm "Brutus"
telescope in Haleakala, Hawaii and the double 14-cm "Cassius"
telescope in Cerro Tololo, Chile, we discovered three new bright
transient sources
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14hi 18:57:46.67 +57:27:14.7 2014-09-16.30 15.2
ASASSN-14hj 21:16:35.73 -07:49:10.6 2014-09-16.11 14.5
ASASSN-14hk 01:39:35.68 +35:38:40.8 2014-09-16.60 14.7
ASASSN-14hi was discovered at V=15.2 in "Brutus" images taken on
2014-09-16.30, but not present (V>17.5) in images taken on
2014-09-14.30. There is no matching source at Vizier at this
position.
ASASSN-14hj was discovered at V=14.6 in "Cassius" images taken on
2014-09-16.11 and at V=14.4 in "Brutus" data taken on 2014-09-16.34,
but not present (V>17.2) in "Brutus" images taken on 2014-09-15.36.
There is a faint (g=22.4), blue SDDS object at this
position, which, while classified as a galaxy, is most likely
the cataclysmic variable in quiescence.
ASASSN-14hk was discovered in "Brutus" images taken on UT
2014-09-16.61 at V=14.7, but not present (V>16.7) in images taken on
UT 2014-09-14.43. At the position of the transient Vizier reports
a match to a faint, B=20.8 USNO-B1.0 source, and also a nearby
GALEX NUV=21.9 source.
Given large amplitude of their outbursts, all three transients may
be WZ Sge-type dwarf novae, caught early. Follow-up observations are
encouraged.
We thank LCOGT and its staff for their continued support of
ASAS-SN. For more information about the ASAS-SN project, see the <a
href=http://www.astronomy.ohio-state.edu/~assassin/index.shtml>ASAS-SN
Homepage</a> and the list of all <a
href=http://www.astronomy.ohio-state.edu/~assassin/transients.html>ASAS-SN
transients.</a>
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