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Image of the SN2009dd supernovae in the spiral galaxy NGC 4088, within the constellation Ursa Major (the plough). This was the brightest galaxy so far this year. This supernovae is a young type II. The supernovae was discovered on the 13th April. By looking at previous images of this galaxy, we know the outburst must have started some time between the 2nd and 4th April.
NGC 4088 the large galaxy at the top of this image. At first sight it looks to have a very bright, almost stellar nucleus. The very bright centre is of course actually due to a supernova within the galaxy's nucleus. NGC 4088 is magnitude 11.2, size 6.0 x 2.3 arc minutes, type SBc. The galaxy at the bottom of the image is NGC 4085, magnitude 13.1, size 2.5 x 0.7 arc minutes, type SBc.
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Date |
GMT |
Magnitude |
Comments |
|
2nd April |
13h 24m |
>18 |
No sign of supernovae |
|
4th April |
20h 53m |
14.4 |
Prediscovery |
|
13th April |
01h 12m |
13.8 |
Discovery by Giancarlo Cortini (Italy); Alessandro Dimai and Elisa Londero (CROSS) (Italy). |
|
22nd April |
|
14 |
The date this image was taken. |
See
http://www.supernovae.net/sn2009/sn2009dd.html for more details.
| Date | Luminance: 22th April 2009 |
| Telescope | 250mm F4.8 Newtonian Reflector with MPCC coma corrector |
| Filter | Lumicon Deep Sky |
| Exposure (seconds) |
22 x 300s Luminance |
| Software | CCDstack & IRIS |
