38   TT BOOTIS  (UGSU)   Range: 12.0-19.3V
     Position:   14 57 44.77  +40 43 41.2  (J2000, from .dat file)
     Magnitude:  V=19.328  B-V=0.004       (Henden, single night)
                                                            
ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR 

a) Comparison star sequence

1    14 57 16.8  +40 42 26  -318  -75  3  12.825  0.014   0.741  0.013   
2    14 57 55.4  +40 45 18   120   97  3  12.862  0.008   0.889  0.010   
3    14 57 58.9  +40 40 04   160 -217  3  13.133  0.000   0.852  0.006   
4    14 57 43.1  +40 45 06   -20   85  3  13.768  0.005   1.291  0.010   
5    14 57 37.9  +40 39 38   -79 -243  3  14.331  0.000   0.531  0.011   
6    14 58 08.3  +40 40 29   267 -192  3  14.806  0.006   0.978  0.011   
7    14 58 01.5  +40 48 13   190  272  3  15.228  0.006   1.403  0.010   
8    14 57 31.5  +40 43 03  -151  -39  3  15.450  0.009   0.711  0.006   
9    14 57 43.1  +40 43 19   -20  -22  3  15.636  0.009   0.744  0.011   
10   14 57 38.4  +40 44 11   -73   30  3  15.659  0.000   0.642  0.009   
11   14 57 29.0  +40 44 15  -180   34  3  15.998  0.013   0.704  0.009   
12   14 57 32.7  +40 44 42  -138   61  3  16.236  0.009   1.202  0.012   
13   14 57 24.2  +40 43 04  -234  -37  3  16.783  0.011   0.689  0.027   
14   14 57 51.4  +40 46 34    75  173  3  17.261  0.026   0.610  0.059   
15   14 57 43.5  +40 41 32   -15 -129  3  18.258  0.029   0.821  0.171   
 

b) Wide-colour extension for CCD calibration

     14 57 34.2  +40 48 45  -121  303  2  16.155  0.008   0.457  0.019   


Notes:

1. There is a AAVSO preliminary revised 'e' chart dated 04/1982, which 
has photoelectric photometry from R. Stanton, which replaced earlier 
Yale photographic transfer photometry.

                      ID   Henden   AAVSO
                             V        V
                      1    12.825   12.8
                      2    12.862   12.8
                      3    13.133   12.6
                      4    13.768   13.9
                      6    14.806   14.8
                      8    15.450   15.4
                      9    15.636   15.7
                      10   15.659   15.6
                      12   16.236   16.2

2. Varies at minimum between about V=19.0 and V=19.3.


Bruce Sumner
Revised 31 July 1999