[vsnet-chat 2761] On V1830 Sgr sequence (Pearce)

["Berto Monard" <LAGMonar@csir.co.za>]

After many experiences, I wouldn't trust any USNO conversions in MW starfields...

Berto 

>>> Brian Skiff <bas@lowell.edu> 03/28/00 09:47AM >>>
     Kato-san might consider recalibrating the vsnet V1830 Sgr chart using an
adjustment found from Henden's photometry for V4444 Sgr, which is about a
degree due west.  How do these compare to 'Kato V' derived from USNO-A1.0?
Some of the brighter stars in the V1830 field might also be in Tycho-2, which
will give a hint as to whether the RASNZ chart has a zero-point problem.

\Brian


Name                  RA  (2000)  Dec    s     GSC       V    B-V
V4444 Sgr 1        18 07 46.3  -27 18 29 h  6850-1948  11.07  0.49
V4444 Sgr 2        18 07 33.8  -27 16 31 h  6850-0890  11.30  1.23 
V4444 Sgr 3        18 07 26.3  -27 20 26 h  6850-0827  11.61  0.76
V4444 Sgr 4        18 07 32.7  -27 17 36 h  6850-0560  12.15  0.50 
V4444 Sgr 5        18 07 22.4  -27 20 35 h  6850-2697  12.40  1.84 
V4444 Sgr 6        18 07 46.3  -27 19 24 h  6850-1610  12.82  0.79
V4444 Sgr 7        18 07 14.6  -27 19 07 h  6850-3558  12.91  1.36 
V4444 Sgr 8        18 07 40.8  -27 23 08 h  6850-3814  13.02  0.58 
V4444 Sgr 9        18 07 42.5  -27 23 21 h             13.23  0.69 
V4444 Sgr 10       18 07 34.4  -27 19 41 h  6850-3010  13.65  1.03 
V4444 Sgr 11       18 07 35.8  -27 18 38 h             13.89  0.54 
V4444 Sgr 12       18 07 30.3  -27 19 55 h             14.13  0.68 
V4444 Sgr 13       18 07 32.3  -27 19 28 h             14.29  1.94 
V4444 Sgr 14       18 07 38.6  -27 19 15 h             14.51  0.74 
V4444 Sgr 15       18 07 38.0  -27 19 48 h             14.89  0.98 
V4444 Sgr 16       18 07 39.7  -27 20 50 h             15.12  0.91

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