131  V699 OPHIUCHI   (UG)   Range: 13.9-<16.5V
     Position:   16 25 14.75  -04 40 25.8 (J2000, from .dat file)
     Magnitude:  V=14.972  B-V=0.322      (from .dat file)

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

a) Comparison star sequence

1    16 25 26.5  -04 39 44   174   42  3  11.966  0.175   0.542  0.102   
2    16 25 35.2  -04 34 33   305  353  3  12.340  0.079   0.445  0.052   
3    16 25 18.9  -04 44 43    61 -257  3  13.217  0.005   1.224  0.016   
4    16 25 28.8  -04 40 24   210    2  3  13.411  0.005   0.792  0.022   
5    16 25 09.1  -04 41 35   -85  -69  3  14.120  0.005   0.957  0.024   
6    16 25 18.7  -04 41 56    58  -90  3  14.292  0.005   1.168  0.019   
7    16 25 26.0  -04 43 09   167 -163  3  14.657  0.005   0.942  0.025   
8    16 25 10.8  -04 40 31   -60   -5  3  15.170  0.000   0.819  0.028   
9    16 25 14.8  -04 40 26    -1    0  3  15.483  0.883   0.608  0.499   
10   16 25 13.1  -04 39 00   -25   86  3  15.728  0.011   0.858  0.018   
11   16 24 58.8  -04 39 09  -239   77  3  16.206  0.011   0.937  0.028   
12   16 25 12.0  -04 39 57   -43   29  3  16.692  0.013   0.791  0.014   
13   16 25 14.9  -04 40 42     1  -16  3  17.415  0.014   1.338  0.055   
14   16 25 17.1  -04 39 28    34   58  3  18.526  0.029   0.940  0.094   
15   16 25 13.7  -04 40 49   -16  -23  2  19.465  0.038   0.703  0.016   


b) Wide-colour extension for CCD calibration

     16 25 12.4  -04 35 59   -36  267  3  17.773  0.011   0.351  0.031   
     16 25 28.9  -04 43 26   211 -180  3  15.424  0.006   1.579  0.011   
     16 25 06.6  -04 43 02  -122 -156  3  17.252  0.009   1.597  0.016   


Notes:

V699 Oph is generally hidden under star 11, a 16.1 red star, and only
dominates this red star when it is in outburst. Otherwise V699 Oph is
almost invisible at minimum, being located only 2.2 arcsec SW of the 
red star.

Vogt made the following photoelectric measures of two stars on a single
night in 1980 (Publ. VSS RASNZ, No. 8, 1980):
     
          ID       Henden          Vogt
                 V      B-V      V    B-V
          1    11.966  0.542   11.74  0.57
          11   15.483  0.608   16.5   1.2 


Star 1 in this sequence is saturated, and is only accurate to about 0.2V.
The value from Vogt should be used for this star. Vogt states that his
errors are less than +/-0.02 for stars brighter than 14 and increase to 
+/-0.5 for the faintest stars (i.e. the 16.5 star given here).


Bruce Sumner
Revised 11 June 1999