[vsnet-alert 25573] Re: MASTER OT J172758.09+380021.5 likely superoutburst

[Marc Deldem]

On the night of 2021 March 20/21, superhumps are visibled on MASTER OT 
J172758.09+380021.5 with an amplitude of 0.1 magnitude and superhumps 
period is 0.05815 days.
The object was at mag 14.8 (CV).

Data have been sent to the AAVSO database.

Best regards,
Marc Deldem

Le 18/03/2021 à 21:24, Patrick Schmeer pasc1312-aavso at yahoo.de via 
vsnet-alert a écrit :
>   Maeda-san detected MASTER OT J172758.09+380021.5
> at mag. 13.9 on 2021 March 17.736 UT, so the
> current outburst looks indeed like a superoutburst:
> http://ooruri.kusastro.kyoto-u.ac.jp/mailarchive/vsnet-outburst/26859
>   
> Clear skies,
> Patrick
> -------
>       Am Donnerstag, 18. März 2021, 21:16:17 MEZ hat Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:
>   
>    MASTER OT J172758.09+380021.5 (UGSU, EI Psc star?)
> https://www.aavso.org/vsx/index.php?view=detail.top&oid=359271
>   
> ZTF light curve, data, and images (via Lasair):
> https://lasair.roe.ac.uk/object/ZTF18aaiytds/
>   
> Recent ASAS-SN Sky Patrol light curve and data:
> https://asas-sn.osu.edu/sky-patrol/coordinate/f2caca6a-eb04-424d-8268-84272988b2cc
>   
> The March 7 outburst was a normal one.
> Hopefully the current outburst is the expected superoutburst.
>
> Clear skies,
> Patrick
> -------
> References:
> All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol:
> - Shappee et al., 2014ApJ...788...48S
> - Kochanek et al., 2017PASP..129j4502K
> Lasair:
> - Smith et al., 2019RNAAS...3...26S
> Zwicky Transient Facility (ZTF):
> - Masci et al., 2019PASP..131a8003M
> -------
>      Am Sonntag, 7. März 2021, 13:55:41 MEZ hat Patrick Schmeer pasc1312-aavso at yahoo.de via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:
>   
>   MASTER OT J172758.09+380021.5  (UGSU, EI Psc star?)
> https://www.aavso.org/vsx/index.php?view=detail.top&oid=359271
>   
> Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
> and Kochanek et al. 2017PASP..129j4502K) light curve and data:
> https://asas-sn.osu.edu/sky-patrol/coordinate/556f26e9-2c4c-44ab-8762-338fb07acabd
>   
> Zwicky Transient Facility (ZTF) light curve and data:
> https://lasair.roe.ac.uk/object/ZTF18aaiytds/
>   
> The current outburst is expected to be a superoutburst (as
> recent superoutbursts were observed 2020 November 8-14
> and 2021 January 8-15).
>   
> Time-resolved photometry is encouraged.
>   
> Clear skies,
> Patrick
>
>    
>