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[vsnet-chat 5010] Re: MisV1147 = HBHA 65-63
- Date: Sun, 13 Jan 2002 01:35:46 -0600
- To: vsnet-campaign-unknown@kusastro.kyoto-u.ac.jp, vsnet-chat@kusastro.kyoto-u.ac.jp, vsnet-id@kusastro.kyoto-u.ac.jp, vsnet-newvar@kusastro.kyoto-u.ac.jp
- From: Seiichi Yoshida <comet@aerith.net>
- Subject: [vsnet-chat 5010] Re: MisV1147 = HBHA 65-63
- Delivered-To: vsnet-chat@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
Dear colleagues,
> Here is the list of the magnitude measured with the PIXY System 2 from
> the DSS images.
>
> Date Mag Plate Reference
> --------------------------------------------------------
> 1953 Oct. 31 12.53R DSS1 07O0 Tycho-2 Catalogue (Rc)
> 1989 Sept. 2 13.18Bj DSS2 A0AJ Tycho-2 Catalogue (B)
> 1991 Sept. 3 12.00R DSS2 A1UC Tycho-2 Catalogue (Rc)
> 1993 Aug. 16 11.88I DSS2 A2BN Tycho-2 Catalogue (Ic)
These measured magnitude were too much bright.
Because the DSS images are based on the photo plate, bright stars are
saturated. Most of the Tycho stars used in the reference above are
those bright ones. In addition, they are much brighter than MisV1147.
So now I select one star, whose brightness looks similar to MisV1147
on DSS images:
USNO-A2.0 1425.14254389 22h53m56s.093 +58o53'34".12 Mag(R):14.7 Mag(B):15.1
and I use it as reference of photometry.
Here is the result.
Date Mag Plate Reference
------------------------------------------------------------
1953 Oct. 31 15.0R DSS1 07O0 USNO-A2.0 1425.14254389 (R)
1989 Sept. 2 15.4Bj DSS2 A0AJ USNO-A2.0 1425.14254389 (B)
1991 Sept. 3 14.6R DSS2 A1UC USNO-A2.0 1425.14254389 (R)
1993 Aug. 16 14.9I DSS2 A2BN USNO-A2.0 1425.14254389 (R)
These magntiude are based on the USNO-A2.0, so they may be too much
faint this time. But I do not know which is the best way to measure
the magnitude from DSS images.
Here are all of the MISAO observations and magnitude from the DSS
images of MisV1147 = HBHA 65-53. These are measured automatically by
the PIXY System 2.
1953 Oct. 31 15.0R DSS 1
1989 Sept. 2 15.4Bj DSS 2
1991 Sept. 3 14.6R DSS 2
1993 Aug. 16 14.9I DSS 2
2000 Aug. 30 12.27C Nobuo Ohkura
2000 Aug. 31 12.57C Nobuo Ohkura
2000 Oct. 11 13.50C Nobuo Ohkura
2000 Oct. 13 13.43C Nobuo Ohkura
2001 Sept.17 14.19C Nobuo Ohkura
2001 Oct. 2 12.52C Nobuo Ohkura
2001 Oct. 3 12.33C Nobuo Ohkura
2001 Oct. 31 12.24C Nobuo Ohkura
2001 Nov. 20 12.16C Nobuo Ohkura
2001 Nov. 21 12.20C Nobuo Ohkura
Best regards,
--
Seiichi Yoshida
comet@aerith.net
http://vsnet.aerith.net/
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