[vsnet-alert 25423] Re: Gaia21avt (Nova Oph 2021)

[FIDRICH Róbert fidusz@gmail.com via vsnet-alert]

Now confirmed as a classical nova
www.astronomerstelegram.org/?read=14413

Stacked 3x120s I-band images remotely made on Feb. 20.7586 UT using a 
0.43m reflector (T17) of http://iTelescope.net at Siding Spring, Australia:
https://twitter.com/fidusz/status/1363373879671074817

Stacked 3x120s R-band images remotely made on Feb. 20.7676 UT:
https://twitter.com/fidusz/status/1363396725482926082

Clear skies,

Robert Fidrich
HAA/VSS



2021. 02. 20. 4:47 keltezéssel, FIDRICH Róbert írta:
> Discovery of probable galactic nova in Ophiuchus, Gaia21avt (AT 2021ddo) 
> at mag 15.75 G, by the Gaia consortium.
> 
> http://www.astronomerstelegram.org/?read=14402
> 
> https://www.wis-tns.org/object/2021ddo
> 
> ...
> 
> ASAS-SN light curve:
> 
> Gaia21avt 2021-02-19.34 UT <16.9g ASN
> 
> https://asas-sn.osu.edu/sky-patrol/coordinate/288f92a0-d785-4608-ba5e-52baa885e7ea 
> 
> 
> ...
> 
> Archival OGLE Observations Reveal Orbital Period of Gaia21avt (AT2021ddo)
> 
> The position of the transient is consistent with that of a faint star (I 
> = 21.32 +/- 0.03 mag) listed as BLG611.07.120340 in the OGLE database.
> The archival OGLE light curve of the source reveals eclipsing 
> variability with a period of 0.9400430 +/- 0.000027 d. If the object is 
> confirmed as a classical nova, this indicates that the system harbors an 
> evolved secondary star, likely a subgiant
> 
> http://www.astronomerstelegram.org/?read=14410
> 
> . . .
> 
> 3x120s I-band and 3x120s R-band images scheduled with T21 at Mayhill, 
> New Mexico.
> 
> Clear skies,
> 
> Róbert Fidrich
> HAA/VSS