Norwegian Astronomical Society - Variable Star Section

Supernova 1998S in NGC 3877

This supernova is of type IIn and was discovered by Zhou Wan (Beijing Astronomical Observatory) on CCD exposures from 1998 March 2.68 UT. Its position is R.A. = 11h 46m 06s.0, Decl. = +47° 28' 55" (J2000.0), which is 14" W and 46" S from the nucleus of the galaxy. (Ref. IAUC 6829, IAUC 6831, IAUC 6832, IAUC 6835)

Chart of SN 1998S

We have prepared an updated chart which covers a field of 35'x35' and shows stars down to magnitude 15. This chart contains precise V-magnitudes by Dalibor Hanzl. It is available electronically in the file formats GIF (size 13 kb), JPG (70 kb), and PostScript (151 kb, best resolution). Stefano Pesci of ISN has prepared a more detailed chart of NGC 3877.

Comparison stars

An updated list of comparison stars with revised magnitude data is available. For comparison the old list remains accessible.

Photometry Updates

  • Photometry Update No. 1 (1998 Mar. 18, 16 kB)
  • Photometry Update No. 2 (1998 Mar. 24, 25 kB)

    I have not found it neccessary to make further updates as Taichi Kato and Stefano Pesci serve the astronomical community well with their regular compilations of observations reported to VSNET and ISN.

    Last update on April 28, 1998 by BHG / Bjørn Håkon Granslo