165  BF ERIDANI   (UG)   Range: 13.2-14.8V
     Position:   04 39 29.95  -04 35 58.8  (J2000, from .dat file)
     Magnitude:  V=14.785  B-V=0.334       (Henden, single night)
                                                            
ID     RA   (2000)   DEC       X    Y  N    V      ERR     B-V    ERR 

a) Comparison star sequence

1    04 39 28.3  -04 40 06   -24 -247  3  12.835  0.021   0.518  0.014   
2    04 39 56.0  -04 34 09   390  110  3  13.370  0.020   0.513  0.006   
3    04 39 32.7  -04 33 15    42  164  3  14.194  0.011   0.665  0.012   
4    04 39 13.6  -04 37 07  -243  -68  3  14.563  0.021   0.474  0.015   
5    04 39 50.3  -04 36 41   305  -42  3  14.939  0.015   0.679  0.018   
6    04 39 42.9  -04 33 50   194  129  3  15.049  0.014   0.523  0.007   
7    04 39 30.2  -04 40 29     4 -270  3  15.312  0.026   0.778  0.016   
8    04 39 17.4  -04 31 55  -188  244  3  15.705  0.030   0.718  0.006   
9    04 39 45.9  -04 36 01   238   -2  3  16.252  0.031   0.550  0.013   
10   04 39 29.3  -04 37 22   -10  -83  3  17.736  0.046   0.574  0.036   


b) Wide-colour extension for CCD calibration

     04 39 35.1  -04 31 55    77  244  3  14.200  0.015   1.508  0.021   
 

Notes:

1. There is a bright star in the southwest corner of the field that 
was too bright to be measured during the photometric determination. 
It is at 04h 39m 09.5s  -04d 41' 53" and it has a reliable Tycho-2 
magnitude of V=8.98+/-0.02.

2. BF Eri is erroneously classified in CGVS as a SR variable with range
13.5-15.5p and a period of 198 days. However it was observed during the 
ROSAT survey and identified as a dwarf nova by Chisholm in 1999. 

3. There is only a single measure available at minimum of V=14.8. The 
variable may actually be fainter than this in quiescence.


Bruce Sumner
17 October 1999
Revised 20 January 2001