ASAS-SN Discovery of A Bright Transient in A Galaxy We Don't Know How Far, Far Away
ATel #6397; I. Cruz (Cruz Observatory), E. Conseil (Association Francaise des Observateurs d'Etoiles Variables), K. Z. Stanek, C. S. Kochanek, A. B. Davis, T. W.-S. Holoien, B. J. Shappee, U. Basu, J. F. Beacom (Ohio State), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), J. Brimacombe (Coral Towers Observatory), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), S. Kiyota (Variable Star Observers League in Japan), J. Nicolas (Groupe SNAUDE, France)
on 16 Aug 2014; 16:03 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (firstname.lastname@example.org)
Subjects: Optical, Supernovae
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 a new transient
source, most likely a supernova, near the galaxy GALEXASC
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14fo 20:34:06.432 -01:58:03.59 2014-08-15.49 15.8
ASASSN-14fo was discovered in "Brutus" images obtained on UT
2014-08-15.49 at V=15.8. It is also present in "Cassius" images taken
on UT 2014-08-14.29 at V=15.8 and in "Brutus" images taken on UT
2014-08-16.39, also at V=15.8. It might also be present, significantly
fainter and subject to further analysis, in "Cassius" images obtained
between UT 2014-08-01.17 and UT 2014-08-05.04.
Images obtained by
I. Cruz on UT 2014-08-16.12 with a 43-cm telescope located near
Reynoldsburg, Ohio, and nearly simultaneously by E. Conseil using a
0.35-m Slooh Space robotic telescope T2 at Mt. Teide, Canary Islands,
confirm the discovery of the transient. This
figure shows the archival DSS image of the host (left) and the
I. Cruz confirmation image (right). The red circle has a radius of 5"
and is centered on the position of the transient derived from the I. Cruz
confirmation image and reported above.
The position of ASASSN-14fo is approximately 6" from the
center of GALEXASC
J203406.21-015759.2, which, while clearly a galaxy in DSS
images, has no redshift available in NED. We note that ASASSN-14fo
is currently, in V-band, at least 1 magnitude brighter than its likely
host galaxy. Follow-up observations, especially spectroscopy, 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 ASAS-SN
Homepage and the list of all ASAS-SN