Alert Notice 807: GK Per undergoing dwarf nova outburst
Abstract:
The old nova (N Per 1901) GK Per is undergoing a dwarf nova outburst, the first observed since 2018. Observations of all types (visual, CCD, DSLR, PEP) and in multiple bands, as instrumentation permits, are strongly encouraged throughout this outburst and for at least 30 days after GK Per returns to minimum.
Justification:
GK Per has dwarf nova outbursts about every 18-36 months, although the interval can vary quite a bit and some intervals can be longer than three years. It is difficult to predict how bright this outburst may be; the brightness and duration of GK Per outbursts have varied substantially over the past 20+ years. The current outburst is occurring more than 4 years after the last observed outburst, making the interval among the longer ones in recent decades.
Requested Data Types:
Photometry, Spectroscopy
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| GK Per | 0.20 | NA/DQ+UG |
Cadence: Not Specified Precision: 100 |
Cadence: Not Specified Resolution: 250 Desired SNR: 100 |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Elizabeth O. Waagen; Imported Campaign (Alert Notice #807)