ASAS-SN Discovery of a Likely Supernova in IC 527
ATel #6102; K. Z. Stanek, T. W-S. Holoien, B. J. Shappee, C. S. Kochanek, J. Jencson, U. Basu, B. Davis, J. F. Beacom (Ohio State), J. L. Prieto (Princeton), D. Szczygiel, G. Pojmanski (Warsaw University Observatory), J. Brimacombe (Coral Towers Observatory), D. Bersier (LJMU)
on 26 Apr 2014; 18:10 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 6105
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or
"Assassin"), using data from the quadruple 14-cm "Brutus" telescope in
Haleakala, Hawaii, we discovered a new transient source, probably a
supernova, very close to the core of IC 527
Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V mag
ASASSN-14ar 09:09:41.7 +37:36:06.5 2014-04-24.28 16.2
ASASSN-14ar was discovered in images obtained 2014 UT Apr. 24.28 at
V~16.2 mag. This object was also present at comparable brightness in
images taken on 2014 UT Apr.12.29, but these data have poor image
quality and our detection algorithm was not triggered. We do not
detect (V<16.5) this object in images taken on 2014 UT Apr. 11.27 and
before. Images obtained on UT Apr. 25.2 with the LCOGT 1-m robotic
telescope at McDonald Observatory and on UT Apr. 25.1 with the RCOS
51-cm telescope in New Mexico (obtained by J. Brimacombe) confirm the
discovery of the new transient. This
figure
shows the ASAS-SN reference image (top left), archival SDSS g-band
image (top right), ASAS-SN discovery subtraction image (bottom left),
and LCOGT confirmation image (bottom right). The red circle has a
radius of 3.0" at the position of the SN candidate derived from the
LCOGT image.
The transient is approximately 1" North and 1" West of the core of
barred spiral galaxy IC 527 (z=0.02298, d=99 Mpc, via NED), which
would give it an absolute V mag of approx. -18.8 (m-M=35.0, A_V=0.06,
Schlafly & Finkbeiner 2011). 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 ASAS-SN
Homepage and the list of all ASAS-SN
transients.