[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]

[vsnet-j 865] V4643 Sgr sequence

V4643 Sgr sequence

　以下の通り、暗い方の比較星光度が発表されました。10等台のTycho光度と何とか
　つながりそうですが、もうちょっと間の比較星があった方がよいかも。
　（で、MEI/NEKOさんに期待・・）

	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: 7.7-17.4B
     Position:   17 54 40.41  -26 14 15.6  (J2000, from .dat file)
     Magnitude:  V=10.542  B-V=1.199       (.dat file, single night)

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

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

VSNET Home Page

Return to Daisaku Nogami

vsnet-adm@kusastro.kyoto-u.ac.jp