I have observed GK Per on Mar. 10 for a few images and found it at mag 12,8. Data are with the AAVSO database.
Josch
On 12.03.2022 11:24, Patrick Schmeer via groups.io wrote:
No unusual activity: https://asas-sn.osu.edu/sky-patrol/coordinate/c0e850a7-4d56-40e5-b65d-7074a0... https://app.aavso.org/webobs/results/?star=000-BBG-044
Apparently another false alarm (as on 2021 October 2, see e.g. ASAS-SN Sky Patrol link below).
Regards, Patrick
Patrick Schmeer wrote on Thursday, 10 March 2022 at 10:45:17 UTC:
GK Persei (NA+UGSS+NLDQ) Orbital period: 1.996872(9) d White dwarf spin period: 0.00406634 d = 5.85530 min = 351.332 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717 https://asd.gsfc.nasa.gov/Koji.Mukai/iphome/systems/gkper.html
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/888406e4-164d-447d-9a21-20d8fc...
AAVSO data: https://app.aavso.org/webobs/results/?star=000-BBG-044
Confirmation and follow-up observations are urgently required.
Clear skies, Patrick
T. Kato wrote (vsnet-alert 26646): GK Per rising Maeda-san has pointed out that GK Per is rising.
PERGK 20220309.4908912 125cG Mdy.VSOLJ rising#
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