[vsnet-alert 3025] Rare outburst of RX J0757.0+6306

[Patrick Schmeer <extpasc@rz.uni-sb.de>]

Visual magnitude estimates by P. Schmeer, Bischmisheim, Germany:
 
RX J0757.0+6306
May  21.95  UT, [13.5 ; 22.949,  13.0 ; 23.003,  13.0
Instrument: 203-mm SCT
Sequence:   Henden (V magnitudes)

Robert Fried obtained at my request a V-band image on May 23.151 UT and a
B-band image on May 23.150 UT. On both images the variable is visible at
mag 13 (a more accurate photometry will hopefully follow soon).

Astrometry and photometry of RX J0757+6306 in quiescence (from Arne Henden's
data):
R.A. 07h57m01.37s  Decl. +63d06'02.4"  (J2000.0)   V= 17.497, B-V= -0.110

High-speed photometry during the current rare outburst is urgently required.

Regards,
Patrick

P.S.:
The following sequence has been compiled by Bruce Sumner (from Henden's data):
------------------------------------------------------------------------------
84.  RX J0757.0+6306
     07 57 01.4  +63 06 02
 

ID     RA (2000)    DEC       X    Y   N    V      ERR      B-V    ERR     

1    07 56 44.8  +63 07 42  -113  100  2  10.908  0.000    0.472  0.000   
2    07 56 50.8  +63 05 21   -72  -41  2  11.450  0.006    0.827  0.004   
3    07 57 35.9  +63 05 31   234  -31  2  12.858  0.008    0.692  0.005   
4    07 56 55.9  +63 09 21   -37  199  2  13.496  0.000    0.925  0.004  
5    07 57 11.9  +63 07 21    71   79  2  13.702  0.006    0.823  0.009 
6    07 57 11.9  +63 02 47    71 -195  2  14.823  0.000    0.590  0.003 
7    07 57 10.6  +63 04 49    62  -73  2  15.350  0.008    0.670  0.011 
8    07 56 58.8  +63 08 41   -18  159  2  15.999  0.000    0.780  0.037 
9    07 56 53.8  +63 06 00   -51   -3  2  17.043  0.014    1.280  0.049

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