- This topic has 7 replies, 3 voices, and was last updated 2 years ago by Robin Leadbeater.
-
AuthorPosts
-
25 August 2022 at 6:57 pm #612121Robin LeadbeaterParticipant
An interesting opportunity to see a supernova at 0.35 redshift, further than would normally be possible with typical amateur imaging. Currently at r mag 18.8, it is approximately 3 magnitudes brighter than normal due to gravitational lensing.
https://www.wis-tns.org/astronotes/astronote/2022-180
Hurry though it is already fading !
https://alerce.online/object/ZTF22aaylnhqCheers
Robin25 August 2022 at 10:41 pm #612132Dr Paul LeylandParticipantStill there. Imaging it right now. Eyeball guess is about 19.0 mag but there is a chance that I may have confused the star with a neighboring EDR3 entry of similar magnitude. Precise measurement should clear it up tomorrow.
Pictures to follow.
Paul
25 August 2022 at 11:07 pm #612133Robin LeadbeaterParticipantThe ZTF cutouts on the alerce site are useful. There is a faint something (the parent galaxy ?) at the coordinates in the template but this is clearly brighter with the SN (about the same brightness as two other stars in the same string on 25th)
(The clouds rolled in here as dusk fell)
Robin
- This reply was modified 2 years, 1 month ago by Robin Leadbeater.
Attachments:
25 August 2022 at 11:28 pm #612136David BoydParticipantHere is a 35 x 60 sec stack of clear filtered images of the field. The SN is clearly visible still.
David
Attachments:
26 August 2022 at 1:20 am #612138Dr Paul LeylandParticipantAnd here is mine. About an hour in total unfiltered. Extremely crude stacking. I am sure a much better image will become available.
- This reply was modified 2 years, 1 month ago by Dr Paul Leyland. Reason: Fix typuo
Attachments:
26 August 2022 at 4:56 pm #612144Dr Paul LeylandParticipantSome crude photometry has now been done. For comparisons 100 stars within 2 arcminutes of 2022qmx were searched in Gaia EDR3; their positions, G magnitudes and errors therein were saved. These and 2022qmx were analyzed with APT 2.8.2
The magnitude at JD 2459817.361, aka 2022-08-25 20:40 UT, is reported as 20.02 (0.02).
Crude, because my images were unfiltered but have been shown to be a decent match to Gaia G by and large.
27 August 2022 at 11:34 pm #612163Robin LeadbeaterParticipantFinally caught it tonight
40×20 sec clearAttachments:
23 September 2022 at 12:54 am #612616Robin LeadbeaterParticipantIt has now been imaged by HST and resolved into four lensed components
https://www.wis-tns.org/sites/default/files/astronotes_files/1052/note_color_wide.jpg
from
https://www.wis-tns.org/astronotes/astronote/2022-196Cheers
Robin- This reply was modified 2 years ago by Robin Leadbeater.
-
AuthorPosts
- You must be logged in to reply to this topic.