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THE ASTRONOMER Electronic Circular No 3016      2014 Aug 02 11.38UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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MASTER OT J163838.07-054846.0 (PECULIAR VARIABLE IN OPHIUCHUS)
Denis Denisenko et. al., Moscow State University and others report on The
Astronomer's Telegram 6333 an outburst of MASTER OT J163838.07-054846.0 =
SDSS J163837.89-054847.5 = WISE J163837.92-054847.5.
The MASTER-Kislovodsk auto-detection system deteced the OT source at RA 16h
38m 38.07s DEC -05d 48' 46.0" on 2014 July 21.770UT. The OT unfiltered
magnitude was 17.0m (limit 18.8m). The OT is seen in three images and a
reference image without the OT was recorded on 2012 June 12.916UT with an
unfiltered magnitude limit 19.5m. 

The object at quiescence is identical to SDSS J163837.89-054847.5 (u=19.87
g=19.32 r=18.83 i=18.48 z=18.14). Despite quite a white colour in the
optical band, there is an unusually large infrared
excess: WISE J163837.92-054847.5 (W1=15.37 W2=15.01 W3=10.96 W4=7.69). The
object is also present in USNO catalogue as USNO-B1.0 0841-0297337 (B2=20.39
R2=19.40). Colour-combined DSS finder chart is uploaded to:
http://master.sai.msu.ru/static/OT/J163838-054846-JRIR5x5.jpg

The object was observed by Palomar/NEAT with good quality images obtained on
24 nights from June 1997 to Aug. 2005. Three similar outbursts were detected
on 2001 June 19, 2002 June 01 and 2005 Aug 28. Photometrically, the object
appears to be a dwarf nova. However, the large IR excess in WISE data is
rather characteristic of an extragalactic origin. Taking into account this
peculiarity, spectral identification is required. The discovery and
reference images are available at:
http://master.sai.msu.ru/static/OT/163838.07-054846.0.jpg

SUPERNOVA 2014bi IN NGC 4096 (LOSS)
2014bi  May 31.25   12 06 02.99  +47 29 33.5  18.2  18.6"E   51.2"N
J.-j. Zhang: spectrum May 31 low-luminosity type-II-P two weeks after
maximum.

SUPERNOVA 2014bj (LOSS)
2014bj  May 22.49   19 22 39.15  +43 53 26.9  17.5
Dave Balam, Dominion Astrophysical Observatory et. al. spectrum June 3 with
the 1.82-m Plaskett Telescope of the National Research Council of Canada,
type-Ia supernova about two weeks after maximum

SUPERNOVA 2014bk (KISS)
2014bk  May 28.51   13 54 02.42  +20 00 24.3  17.9   0.1"E    0.2"N
The object was confirmed in the R band with the 0.7-m telescope at the
Sternberg Astronomical Institute on June 2.83.
M. Stritzinger: spectrum June 5 type-Ibn a week after explosion.

SUPERNOVA 2014bl IN SDSS J132538.81+255734.0 (TNTS)
2014bl  May 20.60   13 25 38.81  +25 57 33.9  18.3   0.1"W    0.2"S
W.-x. Li: spectrum May 26 type-Ic around maximum.

SUPERNOVA 2014bm IN NGC 6456 (F. CIABATTARI ET. AL.)
2014bm  Jun 06.00   17 42 32.16  +67 35 41.8  17.4   2  "E    8  "N
Nothing is visible at this position on the digitised plates of the Palomar
Sky Survey taken on 1987 June 1 (J plate; limiting magnitude 20.3) and on
1993 Aug. 17 (F plate; limiting mag 20.3).
P. Ochner: spectrum June 8 type-Ia about one week after B-band maximum.

Guy M Hurst