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Kiochi Itagaki has discovered tonight a type II supernova SN 2023ixf in M101 currently at mag 14.9
https://www.wis-tns.org/object/2023ixfHi Robin,
Imaging M101 at the moment. C14 Edge+ QSI532 clear and V MEII paramount.
The link you provide doesn’t link through.
Eric K01
uncorrupted link
https://www.wis-tns.org/object/2023ixf
Here is the discovery image
https://www.wis-tns.org/system/files/comment_files/2023ixf.jpg
Robin
Robin thanks for updated links from which I have Id’ed the Super nova. Guess your onto it with the spectroscope.
Eric
Unfortunately I am clouded out just a few miles from clear skies 🙁
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It’s rather hazy in Chelmsford but here but here is an unfiltered image of the SN.
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I think clouds have moved in, just as I’ve changed to a V filter for some photometry. A fresh S/N is a bonus for tonight I was trying out Astroart8 for telescope control, particularly for focusing. If it doesn’t improve shortly I’ll lock up for the night.
Eric
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Kiochi Itagaki has discovered tonight a type II supernova SN 2023ixf in M101 currently at mag 14.9
Thanks for the heads-up Robin. I wish I’d seen that last night as I was imaging for photometry from 10:30 until 03:00 here with lovely skies! Looks clear again tonight…
Cheers
Ian.Just back from a college reunion and saw this new sn-alert. Here is an image I took of M101 with a Tak 100DF and ASI533MC 20 x 120s on 11th May 2023. Pre-supernova?
David
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ZTF report a 10 hours pre-discovery detection at mag 15.9 (g) 2023-05-19 07:45:07 and a negative (fainter than 21.3) 2023-5-16 19:35:38.00
https://www.wis-tns.org/astronotes/astronote/2023-120
so any deep image between those dates could be interestingI imaged it earlier this evening (May 20/21) and it has risen to around mag 12.0 now.
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Here’s a quick stack of 12 x 180s Luminance from last night (around 22:00 on 20th May). I have R, V and B too.
I measured the mag. from the V images as 12.11 (average of 6 images)
C9.27 @ f/7, SX694.
Cheers
Ian.I saw it visually through a 10-inch last night and it was very obvious. I estimated it at magnitude 11.8. I don’t consider myself a seasoned visual observer so being close to a V magnitude of 12 sounds about right.
AndyHere is a link to the AAVSO chart. For those who haven’t used them before you can adjust the size and orientation by clicking plot other chart, and access the magnitudes of the labelled comparison stars by clicking photometry table for this chart.
https://app.aavso.org/vsp/chart/?star=SN%202023ixf&fov=60&maglimit=14.5&resolution=150&north=up&east=left
AndyInteresting- I really struggled to see it and M101 last night with my 12″ Newtonian. I will try again tonight.
I imaged it last night and coincidentally had imaged M101 precisely a month earlier!
Peter
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The earliest pre discovery detection I have seen now pushes back the time of explosion to at least 2023-05-18 T 21:55 (from an image posted on the Cloudy Nights forum)
Here’s my LRVB colour version from last night. I’ve uploaded R, V and B mags to the Photometry Database.
Best Regards
Ian.Attachments:
By chance I photographed M101 on 2023 April 20, and had a go at it again last night, May 20. My processing isn’t particularly consistent but the earlier absence is clear.
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