SN 2005bc

SN 2005bc
Other designations	SN 2005bc
Event type	Supernova
Spectral class	Ia
Date	2 April 2005
Constellation	Boötes
Right ascension	14h 37m 15.050s
Declination	+38° 27′ 23.10″
Epoch	J2000.0
Galactic coordinates	Long 66.764500° Lat 65.168763°
Distance	about 200,000,000 light-years
Redshift	0.0132, 0.0122
Remnant	unknown
Host	NGC 5698
Progenitor	Unknown
Progenitor type	White Dwarf
Colour (B-V)	Unknown
Notable features	None
Peak apparent magnitude	+15.3

SN 2005bc was a Type Ia supernova occurring in the Barred spiral galaxy NGC 5698 in the constellation of Boötes. SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L. Cox.

Discovery

The supernova was at magnitude 16.4 at discovery, and quickly rose to a peak magnitude of around 15.3 (in visible light) just over a week after discovery. By mid-May, the supernova had faded to 17th magnitude.

The host galaxy, NGC 5698, along with the supernova lie approximately 200 million light-years (~60 million parsecs) from Earth. This puts the absolute magnitude of the supernova at around −18.6 at maximum, rather faint for a Type Ia event.

As the supernova was of Type Ia, its progenitor star was a White Dwarf star which exceeded the Chandrasekhar limit.

Below is an image of SN 2005bc and NGC 5698 taken just over a week after peak brightness.

gollark: Take two of the points, subtract one's Y coordinate from the other one's Y coordinate, and do the same for the X coordinates, and divide the difference in Y coords by the difference in X coords.

gollark: <@379441093558927391> I'm assuming that what you want to do is find the equation of the straight line going through those points. So to do that you need the gradient.

gollark: <@379441093558927391>

gollark: Once you have the gradient you just need to work out the y intercept, so put that into the straight line equation (y = mx + c), substitute in the x and y from one of the points, solve for c (y intercept), and you're done.

gollark: =tex m = \frac{y_2-y_1}{x_2-x_1}

External links

Light curves and spectra on the Open Supernova Catalog

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