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[vsnet-obs 11050] SN1998S (Beam)
- Date: Fri, 10 Apr 1998 09:12:58 +0900 (JST)
- To: vsnet-obs
- From: Taichi Kato <tkato>
- Subject: [vsnet-obs 11050] SN1998S (Beam)
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
From: "Bill Beam" <wbeam@ptialaska.net>
Date: Thu, 09 Apr 1998 10:39:07 -0900
Subject: Re: SN1998s magnitude
Hello Stefano,
Hello Taichi,
The last entry on the list below is my latest magnitude measurement of SN1998s.
Note that I have revised my measurement for 98-04-08 1000 due to an error in
makeing a flat field. Fortunately I had left the camera fixed and was able to
take a new flat field.
Observatory location: Fairbanks, AK at 147 40 16 W, 64 51 55 N, 198 m elevation.
Telescope: AstroPhysics 180mm f/9.
Camera: Cookbook CB245.
Filter: none.
Image processing and magnitude estimates by MaxIm_DL.
Measured wrt GSC3452
star 977 mag 15.0
star 997 mag 14.5
star 1016 mag 12.6
star 1091 mag 13.2
star 1101 mag 12.5
Date-time (UTC) Magnitude
98-03-24 0640 12.38 +/- 0.03
98-03-26 0705 12.48 +/- 0.08
98-03-28 0645 12.50 +/- 0.08
98-03-31 0705 12.56 +/- 0.06
98-04-02 0650 12.67 +/- 0.07
98-04-05 0745 12.80 +/- 0.10
98-04-08 1000 12.90 +/- 0.08 revised measurement
98-04-09 0745 12.94 +/- 0.09
Magnitude uncertainties are standard deviation in
comparisons with the above reference stars.
Regards, Bill
Bill Beam/NL7F
wbeam@ptialaska.net
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