[vsnet-alert 26285] GK Per (Nova 1901, intermediate polar) in outburst (since Oct. 2)
GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717 Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data. https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c04... I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044 No visual confirmation by me due to bad weather last night. The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/ The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777). The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1). Follow-up observations (e.g. spectroscopy) are encouraged. 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
GK Per 211003.4589 12.8V FID - preliminary photometry based on a CCD image taken remotely with 0.25m reflector of iTelescope.net at Mayhill, NM, USA https://twitter.com/fidusz/status/1444675702377394185 Robert Fidrich HAA/VSS 2021. 10. 03. 12:07 keltezéssel, Patrick Schmeer via vsnet-alert írta:
GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717
Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data. https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c04...
I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044
No visual confirmation by me due to bad weather last night.
The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/
The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777).
The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1).
Follow-up observations (e.g. spectroscopy) are encouraged.
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
Seems not in outburst yet: PERGK 20211003.776 12.8V DPV --- Pavol A. Dubovsky Vihorlat Observatory, Humenne, Slovakia var.kozmos.sk On 2021-10-03 10:07, Patrick Schmeer via vsnet-alert wrote:
GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717
Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data. https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c04...
I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044
No visual confirmation by me due to bad weather last night.
The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/
The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777).
The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1).
Follow-up observations (e.g. spectroscopy) are encouraged.
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
This is the ASAS-SN Sky Patrol light curve that I generated yesterday: https://asas-sn.osu.edu/sky-patrol/coordinate/6c22a9f3-e6d0-4e19-9221-2bcf64... The unusually bright state is obvious. Further brightening in today's data: https://asas-sn.osu.edu/sky-patrol/coordinate/f6b66e28-d40d-480f-a202-173b86... Let's see whether the slow rise continues. Clear skies, Patrick ------- Am Sonntag, 3. Oktober 2021, 20:42:24 MESZ hat Pavol A. Dubovsky <var@kozmos.sk> Folgendes geschrieben: Seems not in outburst yet: PERGK 20211003.776 12.8V DPV --- Pavol A. Dubovsky Vihorlat Observatory, Humenne, Slovakia var.kozmos.sk On 2021-10-03 10:07, Patrick Schmeer via vsnet-alert wrote:
GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717
Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data. https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c04...
I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044
No visual confirmation by me due to bad weather last night.
The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/
The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777).
The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1).
Follow-up observations (e.g. spectroscopy) are encouraged.
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
Confirm GK Per outburst, PERGK 20211003.9444 10.8 OJR star´s comparison 10.7-11.2 - AAVSO Chart X27176BO Sincerely, José Ripero M1 Group / CAA Madrid/Spain El dom, 3 oct 2021 a las 21:11, Patrick Schmeer via groups.io (<pasc1312-aavso=yahoo.de@groups.io>) escribió:
This is the ASAS-SN Sky Patrol light curve that I generated yesterday:
https://asas-sn.osu.edu/sky-patrol/coordinate/6c22a9f3-e6d0-4e19-9221-2bcf64...
The unusually bright state is obvious. Further brightening in today's data:
https://asas-sn.osu.edu/sky-patrol/coordinate/f6b66e28-d40d-480f-a202-173b86...
Let's see whether the slow rise continues.
Clear skies, Patrick ------- Am Sonntag, 3. Oktober 2021, 20:42:24 MESZ hat Pavol A. Dubovsky < var@kozmos.sk> Folgendes geschrieben:
Seems not in outburst yet: PERGK 20211003.776 12.8V DPV
--- Pavol A. Dubovsky Vihorlat Observatory, Humenne, Slovakia var.kozmos.sk
On 2021-10-03 10:07, Patrick Schmeer via vsnet-alert wrote:
GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717
Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data.
https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c04...
I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044
No visual confirmation by me due to bad weather last night.
The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/
The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777).
The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1).
Follow-up observations (e.g. spectroscopy) are encouraged.
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
_._,_._,_ ------------------------------ Groups.io Links:
You receive all messages sent to this group.
View/Reply Online (#309) <https://groups.io/g/baavss-alert/message/309> | Reply To Group <baavss-alert@groups.io?subject=Re:%20Re%3A%20%5Bbaavss-alert%5D%20GK%20Per%20%28Nova%201901%2C%20intermediate%20polar%29%20in%20outburst%20%28since%20Oct.%202%29> | Reply To Sender <pasc1312-aavso@yahoo.de?subject=Private:%20Re:%20Re%3A%20%5Bbaavss-alert%5D%20GK%20Per%20%28Nova%201901%2C%20intermediate%20polar%29%20in%20outburst%20%28since%20Oct.%202%29> | Mute This Topic <https://groups.io/mt/86039264/5677264> | New Topic <https://groups.io/g/baavss-alert/post> Your Subscription <https://groups.io/g/baavss-alert/editsub/5677264> | Contact Group Owner <baavss-alert+owner@groups.io> | Unsubscribe <https://groups.io/g/baavss-alert/leave/9734626/5677264/1190056191/xyzzy> [astronomiaojr@gmail.com] _._,_._,_
participants (4)
-
FIDRICH Róbert -
Jose Ripero -
Patrick Schmeer -
Pavol A. Dubovsky