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THE ASTRONOMER Electronic Circular No 2747      2011 Jun 25 11.54UT
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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V1312 SCORPII = NOVA SCORPII 2011 = POSSIBLE NOVA IN SCORPIUS
Further to the report on TA E-Circular 2742 of a possible nova in 
Scorpius, the object has been designated V1312 Scorpii according to CBET 
9216.

Elizabeth Waagen, AAVSO, reports that a low-dispersion spectrum taken by 
J. L. Menke (Barnesville, MD, U.S.A.) on June 2.18UT shows H-alpha 
emission; the spectrum was obtained using an N18 DSS7 ST402 camera (ten 
exposures, each 120 sec, calibrated, and aligned), and the reference 
star was nearby SAO 208167 (type B7iii).

Additional visual magnitudes reported in part via AAVSO:
2011 June 2.33 UT, V = 10.4 (Arto Oksanen and C. Harlingten; 50-cm Dall- 
Kirkham telescope); 2.56, 11.2 (P. Williams, Heathcote, NSW, Australia); 
3.15, 10.4 (R. Tyson, Freeport, NY, U.S.A.); 4.21, 10.5 (C. Montalvo, 
Lima, Peru); 5.03, 11.6 (G. Vargas Beltran, Cochabamba, Bolivia);

SUPERNOVA 2011bk = PSN J16203475+2112082 (La Sagra)
2011bk  Mar  7.08   16 20 34.75  +21 12 08.2  15.8R  7.6"E,   0.7"S
G. H. Marion, Harvard-Smithsonian Center reports a spectrum of Apr 3UT 
shows it is a type-Ia supernova then about one month past maximum light

SUPERNOVA 2011bl IN UGC 8554 = PSN J13341470+3712348 (LOSS)
2011bl  Apr  5.41   13 34 14.70  +37 12 34.8  16.9   0.4"W,   6.2"N
E. Gall et. Al., report it is a very young type-Ib/c then around 10 days 
before maximum.

SUPERNOVA 2011bm IN IC 3917 = PSN J12565389+2222282 (La Sagra)
2011bm  Apr  4.98   12 56 53.89  +22 22 28.2  17.0R  5.8"E,   3.1"N
E. Gall et. al., reports that a spectrum of April 11 suggests the best 
match is found to be with type-Ic supernovae close to maximum.

SUPERNOVA 2011bn = PSN J16164236+0014299 (CRTS)
2011bn  Mar  8.46   16 16 42.36  + 0 14 29.9  18.9  17.9"W,  16.9"S
L. Tomasella et. al., report a spectrum of Apr. 10.41UT suggest
type-II then about one month post explosion.

SUPERNOVA 2011bo IN ESO 337-6 = PSN J18593846-4145558 (CHASE)
2011bo  Mar 21.34   18 59 38.46  -41 45 55.8  17.6   8.1"W,   9.3"S
N. Morrell, Las Campanas Observatory and others report a spectrum of 
Mar. 29.4 UT provides a close match to that of SN 1991N at twelve days 
after maximum light.

Guy M Hurst