187  V1062 CYGNI   (UG)   Range: 13.4-18.1V
     Position:   21 08 12.18  +36 49 27.9  (J2000, from .dat file)
     Magnitude:  V=18.068  B-V=0.734       (Henden, single night)

ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR
 
a) Comparison star sequence

1    21 07 44.9  +36 48 04  -328  -84  1   9.606  0.001   0.954  0.001   
2    21 08 26.2  +36 48 00   168  -88  1   9.796  0.001   0.985  0.001   
3    21 08 34.1  +36 47 09   263 -139  1  10.238  0.001   1.491  0.002   
4    21 07 52.9  +36 43 34  -232 -354  1  10.967  0.001   0.257  0.001   
5    21 08 20.2  +36 52 06    96  158  1  11.516  0.002   0.598  0.003   
6    21 07 47.2  +36 52 12  -300  164  1  11.872  0.002   1.798  0.005   
7    21 08 12.9  +36 50 18     9   50  1  12.768  0.003   1.256  0.007   
8    21 07 59.9  +36 48 58  -147  -30  5  13.423  0.010   1.089  0.003   
9    21 08 05.6  +36 49 17   -79  -11  5  14.024  0.015   0.515  0.007   
10   21 08 09.6  +36 49 39   -31   11  5  14.225  0.018   0.822  0.007   
11   21 08 11.7  +36 49 24    -7   -4  4  14.778  0.020   0.677  0.006   
12   21 08 13.7  +36 49 35    18    6  4  15.380  0.052   0.703  0.011   
13   21 08 12.9  +36 49 49     8   21  4  16.007  0.017   0.679  0.016   
14   21 08 11.8  +36 49 55    -4   27  4  17.679  0.017   0.836  0.053   


b) Wide-colour extension for CCD calibration

     21 08 23.5  +36 45 31   136 -237  5  13.780  0.013   0.344  0.006   
     21 08 24.7  +36 52 59   150  211  3  13.034  0.022   0.347  0.018   
     21 08 32.9  +36 46 10   249 -198  1  12.442  0.003   1.690  0.007   
     21 08 28.0  +36 49 03   190  -25  1  11.960  0.002   1.775  0.005   

Notes:

1. The six brightest stars in this sequence were observed on only
a single night, but on a very short exposure. The magnitudes should 
be accurate to about 0.05 magnitude. The brightest four stars also 
have reliable Tycho-2 magnitudes, as follows; #1 V=9.69+/-0.02, 
#2 V=9.88+/-0.02, #3 V=10.24+/-0.03 and #4 V=10.88+/-0.05.

2. There is another bright star on the northern edge of the field 
at 21h 08m 02.4s +36d 54' 49" with a reliable Tycho-2 magnitude of
V=9.13+/-0.01.

3. Another example of a dwarf nova that becomes redder as it fades. 
Two magnitudes and colours are available. The first is V=17.395 and 
B-V=0.355 and the other is V=18.068 and B-V=0.734. 

4. Measured twice at minimum, with an indicated range of V=17.4 to V=18.1.


 

Bruce Sumner
23 January 2001