SN 1939C

SN 1939C

A light curve for SN 1939C, adapted from Schaefer (1996). [1] The red arrows show upper limits.
Event type	Supernova
SN.I:
Date	17 July 1939 [2]
Constellation	Cepheus [2]
Right ascension	20:34:23.0 [3]
Declination	+60:09:37.3 [3]
Host	Fireworks Galaxy (NGC 6946) [2]
Peak apparent magnitude	13.0 [3]
Other designations	SN 1939C, 2MASS J20342405+6009299, GPM 308.600512+60.158384, Gaia DR2 2194501518284091008

SN 1939C was a supernova in the Fireworks Galaxy discovered by Fritz Zwicky on 17 July 1939. ^{[4] [2]} With a right ascension of 20:34:23.0 and a declination of +60:09:37.3, it was 215"W and 24"N away from the center of the Fireworks Galaxy. ^[2] It was found at magnitude 14.4, after it had peaked, and was estimated to have been as bright as magnitude 13. ^[3]

References

1. Schaefer, Bradley E. (June 1996). "Volume-limited Samples of Supernovae". Astrophysical Journal. 464: 404–411. doi:10.1086/177331 . Retrieved 18 May 2025.
2. Frommert, Hartmut; Kronberg, Christine (9 March 2009), NGC 6946 , retrieved 31 August 2011
3. Schlegel, E. M. (1994). "X-Ray Emission from the Historical Supernovae in the Spiral Galaxy NGC 6946: SN 1980K and 1968D Recovered". The Astronomical Journal. 108: 1893. Bibcode:1994AJ....108.1893S. doi:10.1086/117202.
4. Strömgren, Elis (2 September 1939). "Circular No. 793". Central Bureau for Astronomical Telegrams. Observatory Copenhagen IAU . Retrieved 19 December 2024.

External links

• Light curve Archived 2017-12-22 at the Wayback Machine on the Open Supernova Catalog Archived 2016-03-03 at the Wayback Machine