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The recurrent nova U Sco is reported to be in eruption at mag 11.4 on June 6.720 (M. Moriyama, Nagasaki, Japan via baavss alert).
Confirmation is urgently requested.
If so, it might be on the rise. Max is usually around mag 8. Eruptions are very brief (a few days)
Its last eruption was 2010.
Charts here: https://app.aavso.org/vsp/chart/?star=U%20SCO&fov=60&maglimit=14.5&resolution=150&north=up&east=left
Can be scaled/orientated to choice
Multiple confirmations of the eruption have appeared overnight. Appears to be around maximum (8th mag).
In the 2010 eruption, it faded one mag in a day and 6 mags in 4 days. Let’s hope we get a break in UK skies (I’ve not seen any UK obs yet)
I was going to attempt an observation last night, cloud got in the way, might be a bit ambitious from where I live in South Wales as it has a good chance of being obscured by trees and buildings
There is an early spectrum from the 2SPOT team from their robotic ALPY 600 setup in Chile
https://groups.io/g/spectro-l/message/412
which seems to be evolving fast compared with the description of one taken less than 12 hours later referenced in Atel 15420
https://www.astronomerstelegram.org/?read=15420Here’s a single 60s exposure with Green filter – U Sco is marked centre of frame. North is left.
Star A is HD 147473 (Mag 6.87V)
Star B is HD 146592 (Mag 7.06V)Attachments:
Not a chance from North Brum (even if clear), but SLOOH C2 captured an image on June 8…
June 8.052 9.461CV (0.002)
June 8.053 9.468TG (0.008)So it’s already nearly two mags fainter than it’s peak on June 7 (AAVSO light curve).
Gary
A paper by Brad Schaefer submitted to MNRAS appears on ArXiv today: https://arxiv.org/abs/2206.14231#
It describes a missed eruption of U Sco in 2016
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