25 August 2022 at 6:57 pm #612121
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.
Hurry though it is already fading !
Robin25 August 2022 at 10:41 pm #612132
Still 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.
Paul25 August 2022 at 11:07 pm #612133
The 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)
- This reply was modified 1 month ago by Robin Leadbeater.
Attachments:25 August 2022 at 11:28 pm #612136David BoydParticipant
Here is a 35 x 60 sec stack of clear filtered images of the field. The SN is clearly visible still.
Attachments:26 August 2022 at 1:20 am #612138
And 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 1 month ago by Paul Leyland. Reason: Fix typuo
Attachments:26 August 2022 at 4:56 pm #612144
Some 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 #612163
Finally caught it tonight
40×20 sec clear
Attachments:23 September 2022 at 12:54 am #612616
It has now been imaged by HST and resolved into four lensed components
- This reply was modified 2 days, 4 hours ago by Robin Leadbeater.
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