1216+05 Supernova 1999gn in NGC 4303 = M61
Active Dates: Dec. 17, 1999 – Dec. 20, 1999
Abstract:
An apparent supernova in NGC 4303 (= M61) was discovered on Dec. 17.22 UT at unfiltered CCD magnitude 16.0, using a 0.50-m telescope. Various observations confirmed its presence and precise location.
Justification:
Please use this chart to observe 1216+05 SN 1999GN and report your observations to AAVSO Headquarters so we may inform the astronomical community.
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| SN 1999gn | 16.00 | SN II |
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: Alessandro Dimai; Imported Campaign (Alert Notice #268)