Amateur discovers supernova 14 years ago
Amateur discovers supernova 14 years ago
A fortuitous discovery by a Brazilian astrophotographer adds another note to the "supernova song".In January 2017, the amateur astronomer Stockler de Moraes made an image of the distant galaxy NGC 1892 using his 12-inch telescope.
When he compared his photo with another one made in 2004 from the same galaxy, taken as part of the Carnegie-Irvine Galaxy Survey (CGS), he discovered a difference: a bright font was noted in the file photo that was not in the recent image.
Stocker de Moraes contacted the astronomer James Guillochon (Harvard Center for Astrophysics), who evaluated different possibilities, such as some minor planet in our solar system that coincided with the location in the galaxy's sky. Guillochon and colleagues then explored other archival images and analyzed the image of the CGS. The event - labeled as CGS2004A - was not in any additional images before and after CGS observations.This was published a few days ago in the "Research notes" of the AAS. There they explain why they consider that the source was a Type IIP supernova of 14 years ago (2004) and that nobody had discovered until now. Other details are also given, such as the equipment used by Stockler de Moraes: A Canon 1100D mounted on a GSO 305 mm, that is, a 30 cm telescope.
According to Guillochon, NGC 1892 has a stellar mass of 4 × 109M solar, with which the fraction of supernovas type II must be more than half of the totality of supernovas of the galaxy. A Type II supernova is when a massive star collapses.
One more example of how Pro-Am collaboration, between amateurs and professionals, can generate interesting astronomical discoveries.
The song of the supernovas
In February, the YouTube account Astronomy Sound of the Month released a video with the song "Champagne Supernova" that shows the discovery of these events from 1950 to this year, varying the frequency of sound and images to match the frequency of findings in chronological form.
If you get bored during the first few seconds, forward the video to the year 1990 and be amazed!https://youtu.be/CC_6skBtZHw
Sources and related links
"Serendipitous Discovery of a 14-year-old Supernova at 16 Mpc,"
James Guillochon et al 2018 Res. Notes AAS 2 165.
DOI:10.3847 / 2515-5172 / aade89AASNova: Surprise Discovery of a 14-Year-Old Supernova
https://aasnova.org/2018/09/12/surprise-discovery-of-a-14-year-old-supernova/About the images
Credit: James Guillochon et al 2018 Res. Notes AAS 2 165.
SOURCE LINK THE BEST ONLINE UFO WEBSITES https://www.beviral.online
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