Supernova 1997dq in NGC 3810
Active Dates: Nov. 2, 1997 – Nov. 6, 1997
Abstract:
We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 6770) that S. Nakano reported the discovery by Masakatsu Aoki, in Toyama, Japan, of an apparent supernova of magnitude 15.0 on seven unfiltered CCD frames taken on Nov. 2. The discovery was confirmed by Aoki on three CCD frames taken on Nov. 3. C. Scovil (Stamford, CT) reported the supernova at visual magnitude 15.1 on Nov. 6.3972 UT. The supernova is located at: R.A. = 11h 40m 55s.90 Decl. = +11 degrees 28'45".7 (equinox 2000.0) and is 43" west and 29" north of the center of NGC 3810. Spectroscopic observations obtained at Multi-Mirror Telescope on Nov. 5.5 UT and reported by S. Sha, P. Chalis, P. Garnavich, and R. Kirshner at Harvard Smithsonian Center for Astrophysics indicate it to be a Type-Ib supernova near maximum. Accompanying is an AAVSO 'e' scale Supernova Search Preliminary chart of NGC 3810, prepared by C. Scovil and showing the location of SN 1997dq. Please use this chart to observe the supernova, and report your observations of 1135+12 SN 3810 to AAVSO Headquarters, making sure you indicate which comparison stars you used. Congratulations to Masakatsu Aoki on his latest discovery!
Justification:
Spectroscopic observations indicate it to be a Type-Ib supernova near maximum. Observers are encouraged to use the accompanying AAVSO 'e' scale Supernova Search Preliminary chart of NGC 3810 to observe the supernova, and report their observations to AAVSO Headquarters.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| SN 1997dq | 14.80 | SN Ic-BL |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Masakatsu Aoki; Imported Campaign (Alert Notice #243)