[vsnet-sequence 61] V4643 Sgr sequence

["Bruce Sumner" <b.sumner@bom.gov.au>]

	Here is a new sequence for Nova Sagittarii 2001=V4643 Sgr.

	I have created this new BVRI sequence from field photometry 
obtained by Arne Henden on a single night. It very nicely takes 
over from the Tycho-2 sequence that this nova is just leaving on
its rapid decline. 

	Both visual and CCD observers should find this sequence of
use as the nova fades.

Bruce Sumner

-------------------------------------------------------------------- 
207  V4643 SAGITTARII   (N)   Range: 7.717.4B
     Position:   17 54 40.41  26 14 15.6  (J2000, from .dat file)
     Magnitude:  V=10.542  BV=1.199       (.dat file, single night)

ID     RA  (2000)   DEC       X    Y   N    V      BV    VR    RI

1    17 54 37.5  26 16 36   40 140  1  11.231  0.620  0.406  0.367 
2    17 54 22.1  26 14 32  246  16  1  11.513  0.290  0.182  0.190 
3    17 54 33.8  26 13 37   89   39  1  12.382  0.341  0.234  0.195 
4    17 54 33.1  26 10 46   99  210  1  12.906  0.602  0.430  0.402 
5    17 54 49.3  26 15 52   119  96  1  13.062  1.028  0.677  0.701 
6    17 54 53.7  26 14 54   179  38  1  13.400  0.594  0.408  0.391 
7    17 54 42.2  26 15 15    24  59  1  13.746  0.942  0.612  0.600 
8    17 54 41.5  26 15 50    15  94  1  14.051  0.868  0.455  0.573 
9    17 54 48.1  26 14 23   103   7  1  14.446  0.838  0.605  0.587 
10   17 54 51.2  26 14 00   146   16  1  14.558  0.863  0.396  0.454 
11   17 54 41.2  26 10 38    11  218  1  15.080  0.902  0.523  0.534 
  
Notes:

1. This sequence is based on BVRI field photometry obtained by Arne 
Henden on a single night. Arne comments that the night was not great, 
and that the zero point errors are estimated to be 0.03mag.

2. This BVRI sequence, in a different format to my usual sequences, 
will be of use to both visual and CCD observers as this nova 
continues its rapid decline. 

Bruce Sumner
5 March 2001



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