U Scorpii

Affiliation

Nucleo de Estudo e Observacao Astronomica - Jose Brazilicio de Souza (Florianopolis, Brazil) (NEOA-JBS)

Tue, 09/28/2021 - 20:25

Dear friends,

Follows information from ATEL #14939:

"The Large Area Telescope (LAT), one of two instruments on the Fermi Gamma-ray Space Telescope, has detected a new transient gamma-ray source, Fermi J1623-1752. From data obtained on 2021 Sep 28 (00:00-06:00 UTC),...

A possible counterpart to the LAT transient is the recurrent nova U Scorpii with position offset by 0.18 deg from the LAT position...",

URL: https://www.astronomerstelegram.org/?read=14939

In 2021 Sept. 27 at 22:22 UT I observed U Sco's field and this star was not observed, so my estimate was fainter than 11.5 (using ASAS-3 comps).

with regards,

AAX

GKI

Affiliation

None

Tue, 09/28/2021 - 21:07

Re:

Thanks for this post Alex, it’s very interesting! I remember in 2017-2018 there was an observing campaign of this star system but was cancelled because it was reckoned by Brad Schaeffer that it had gone into outburst while behind the sun in early 2018. Only time will tell whether this could have been true, let’s wait and see….unfortunately for me it is now too low in the sky to observe until early January

Keith.

FRF

Affiliation

Magyar Csillagaszati Egyesulet, Valtozocsillag Szakcsoport (Hungary) (MCSE)

Wed, 09/29/2021 - 00:42

fainter than 16.1TG

U Sco 2021 Sept 28.9942 UT <15.1C FRF

U Sco 2021 Sept 28.9984 UT <16.1TG FRF

Using a 60s luminance and green images respectively taken remotely with T70 of iTelescope.net located in Chile.

Image with green filter: https://twitter.com/fidusz/status/1443014491751452678