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[vsnet-chart 40] Revised chart of V2051 Oph
- Date: Tue, 26 May 1998 11:49:28 +0900 (JST)
- To: vsnet-chart
- From: Taichi Kato <tkato>
- Subject: [vsnet-chart 40] Revised chart of V2051 Oph
- Sender: owner-vsnet-chart@kusastro.kyoto-u.ac.jp
V-magnitude chart of V2051 Oph (revised)
* Re-calibrated using Vogt's V measurements, kindly provided by B. Sumner.
Comment by B. Sumner:
Here is Vogt's sequence for V2051 Oph, published in Publ. VSS RASNZ,
1980. The reference chart is vsnet 567, 4 March 1996. Karen Meech's
magnitudes are stated to be of various accuracy in PASP,95,662, but
they are definetely different to Vogt. Meech's two common magnitudes
are in brackets ( ).
vsnet Vogt
V B-V U-B Nights
1048 10.33 0.52 0.11 7
1113=(1117) 10.95 0.61 0.16 1
1202 11.87 0.78 0.28 3
1392=(1387) 13.52 1.93 1.4 2
1411 13.79 1.64 1.9 2
1463 14.13 1.86 1.1 2
You can see why I am suggesting a recalibration, Vogt's magnitudes
are very different from Meech's. However the fainter stars are very
red, could this make a difference? The vsnet stars 1411 and 1463 are
just east of V2051 Oph. 1048 and 1202 are the bright double to the
west of the variable.
My comment:
The fainter three stars being very red, I used the brighter three
in re-calibrating the VSNET chart. The systematic difference for red
stars are mainly caused by the bluer responce of the Ouda V-band
(Meech's data seem to show the similar tendency). Probably there maybe
less red stars of comparable brighteness suitable for visual observations.
170819.09 -254830.8 2000 V2051 Oph UGSU+E 11.8-17.5V
(position and classification are revised)
----------------------------------------------------------------------
frame DP144792 350 V2051 Oph V
date 96 3 3.84996 (V mag) SCALE 0.02
1003 27807 1535 0
1049 14970 1471 0
1200 2737 1548 0
1334 21671 1590 0
2158 10689 1576 0
2007 17816 1642 0
2320 14306 1493 0
2376 16161 1629 0
2497 23760 1528 0
2775 9469 1594 0
2648 19839 1619 0
2939 6517 1599 0
3032 10692 1493 0
2893 14401 1637 0
3096 7389 1664 0
3198 14908 1642 0
3273 19421 1651 0
3556 25909 1457 0
3571 11256 1556 0
3723 20567 1352 0
4176 9745 1495 0
4272 6242 1595 0
4279 15835 1428 0
4367 13225 1422 0
4431 17587 1588 0
4566 8615 1545 0
4487 21780 1596 0
4683 7729 1470 0
4727 23165 1556 0
4947 6683 1624 0
5201 14424 1398 0
5412 13404 1633 0
5460 27077 1533 0
5451 4345 1535 0
5649 22671 1614 0
5893 25849 1501 0
6315 5649 1507 0
6166 9577 1624 0
6595 8613 1656 0
6716 26763 1657 0
6814 21629 1628 0
7078 2748 1642 0
7206 15376 1610 0
7187 18027 1644 0
7488 8780 1668 0
7656 16510 1514 0
7735 20089 1459 0
7825 23813 1583 0
7962 24769 1470 0
8217 6023 1643 0
8397 5321 1575 0
8498 9397 1518 0
8935 19383 1647 0
9370 18345 1097 0 (1095)
9467 22297 1595 0
9280 24403 1597 0
9479 27761 1245 0
9605 2432 1548 0
9750 9325 1447 0
10005 8509 1395 0 (1379red)
10142 25370 1588 0
10220 22724 1624 0
10305 18902 1431 0
10300 23641 1658 0
10467 14887 1621 0
10681 9184 1553 0
10775 5840 1571 0
10922 11620 1563 0
10974 15826 1454 0
10997 28057 1569 0
11042 23782 1619 0
11149 13239 1590 0
11547 24255 1647 0
11597 19725 1536 0
11715 8421 1656 0 V2051 Oph
11788 10175 1554 0
11824 27860 1447 0 (1413red)
11772 16269 1605 0
12560 12645 1563 0
12654 18532 1649 0
12540 24376 1358 0
13036 6112 1609 0
13352 2676 1570 0
13422 17707 1587 0
13455 21865 1483 0
14024 17188 1585 0
14027 12727 1376 0 (1352red)
14149 15809 1569 0
14127 27036 1375 0
14559 8104 1032 0 (1033)
14806 11898 1664 0
14980 10956 1653 0
14932 26645 1308 0
15121 4249 1566 0
15271 8059 1186 0 (1187)
15398 24097 1481 0
15906 13998 1456 0
15782 17391 1562 0
15942 23284 1666 0
15987 24316 1648 0
16133 19544 1556 0
16995 20222 1653 0
17173 7803 1450 0
17289 24320 1487 0
17464 14465 1573 0
17383 23794 1446 0
17686 13644 1519 0
17829 9905 1603 0
17994 21834 1649 0
18560 19715 1656 0
18561 8358 1494 0
18592 9743 1666 0
18702 5152 1492 0
----------------------------------------------------------------------
(x y mag sat)
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