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SN2020hvf in NGC3643

SN 2020hvf was discovered in the 14th-magnitude galaxy NGC 3643 in southern Leo copnstellation on April 21st 2020 by the ATLAS Project. Located 21.9 minutes east and 2.7 minutes north of the galactic nucleus, the supernova was initially faint (mag. 15.5). After about 10 days it had climbed to magnitude 12.5, outshining not just the core but the entire galaxy because NGC 3643 is only a faint, 13.5-magnitude galaxy. This means this SN is more bight than 100 or more billion suns!  Distance: 79 millions light years.

A total of 8 images, 600 seconds long were processed, combine, and, calibrated to obtain the final graph.

Below the graph is a synthesize creation of  emission and absorption lines of the entire range.

How I Started
The Equipment
Eclipsing Binaries
Be Stars
Wolf-Rayet Stars
Carbon Stars
Nova Cyg 2014

In the wide field finder telescope image below you can see how dense the star field is and if you look closely the faint SN.  I use this field of view to find the target and move the telescope to have the target visible in the spectrograph guiding camera .  Then I center the target on the slit of the spectrograph with the guiding camera and collect the spectra with the imaging camera.  Below the finder telescope image is the guiding module image on the main telescope.  You can see a more magnified field of objects with the dark slit opening of the spectrograph.  The guiding module controls the telescope tracking, keeping the SN light on the spectrograph slit collecting the data.  Also the guiding image and finder scope images are flipped.  Which is not an issue when I'm collected data, but makes it interesting when trying to explain how the system operates.


All the images in this site are Copyright 1999-2022 by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited.