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THE ASTRONOMER Electronic Circular No 2920      2013 Jun 04 15.06UT
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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R CRB
This variable is once again fading as reported by numerous observers:
May 06: 10.9v; May 08: 11.3v; May 13: 11.7v (Mike Gainsford)
May 25.94, 12.21C; June 01.94 12.92C (unfiltered, Roger Pickard)
May 11.071, 11.11V (Hurst, BRT, V filter)

Gary Poyner comments:
There was a period in the 1960's when RCB spent around 5 years at minimum,
interspersed with short recoveries to near maximum brightness. This current
minimum has lasted some 5 years 11 months (around 2,150 days), so it is
indeed a record!

Rogers unfiltered CCD is picking up the redness of RCB at present, as
visually it is about half a mag. Fainter.

PNV J19150199+0719471 (=ERUPTIVE OBJECT IN AQUILA)
Nick Hewitt, Northampton, England responds to the note on TA E-Circular
2919:
It was imaged on 2013 June 3 (01h40mUT) giving V=11.36 using AAVSO
comparison 115 and 126 as comparisons. He used the TMB 115mm refractor f/7
with SXV-H9 and this was a 300second exposure through luminance filter from
Northampton.

SUPERNOVA 2013bh (CATALINA REAL-TIME TRANSIENT SURVEY)
2013bh  Apr  3.41   15 02 13.09  +10 38 45.6  18.5  15.9"W    2.0"N
S. Taubenberger: spectrum Apr 4 indicates a peculiar type-Ia supernova
around maximum

SUPERNOVA 2013bi IN NGC 6632 (XINGMING SKY SURVEY)
2013bi  Mar 24.91   18 25 01.98  +27 31 53.7  16.4  12.6"W   13.3"S
D. Milisavljevic: spectrum Apr 14 type-IIPsimilar to SN 2004et 2-4 weeks
after maximum.

SUPERNOVA 2013bj IN PGC 50171 (ITALIAN SUPERNOVA SEARCH)
2013bj  Apr  4.01   14 04 19.63  +07 03 06.9  18.0  21  "E   12  "S
M. Childress: spectrum Apr 12 type-IIP 5-6 weeks past maximum

SUPERNOVA 2013bk IN IC 553  (CATALINA REAL-TIME TRANSIENT SURVEY)
2013bk  Apr  7.38   09 40 47.55  -05 26 11.9  18.3  36.2"E    4.6"S
M. Childress: spectrum Apr 12 type-Ic near maximum

SUPERNOVA 2013bl IN UGC 4578 (EAGLE HILL SUPERNOVA SEARCH)
2013bl  Apr  7.07   08 46 15.06  +41 34 40.0  18.0: 10.8"E    7.2"S 
L. Tomasella: spectrum Apr 17 stripped-envelope supernova 

SUPERNOVA 2013bm IN UGC 5910 (ITALIAN SUPERNOVA SEARCH)
2013bm  Apr 16.81   10 48 26.57  +38 24 07.9  17.9  16  "W   19  "N
L. Tomasella: spectrum Apr 17 young type-II supernova.

Guy M Hurst