AAVSO International Database

Alert Notice 651: Monitoring of T Pyx needed for HST observations

September 27, 2018: Dr. Ed Sion (Villanova University) requests AAVSO observers' assistance in monitoring the recurrent nova T Pyx, beginning immediately, in support of upcoming HST observations.

The HST COS observations have been scheduled to take place during the window of 2018 October 4 - 6. It is essential to know the status of T Pyx in order for the HST team to safeguard the instrumentation and make a final decision about approving the COS observations.

Alert Notice 649: Dwarf nova outburst of GK Per (N Per 1901)

Note: The outburst suspected of possibly beginning in early October did not occur. Please continue to observe.  -  Elizabeth O. Waagen, 29 October 2021

GK Per MAY be beginning an outburst; please continue to observe.  -  Elizabeth O. Waagen, October 4, 2021

Although the 2018 outburst of GK Per has been over for some time, ongoing good coverage is requested.  -  Elizabeth O. Waagen, 13 April 2020

Alert Notice 647: Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088

August 13, 2018

Event: Nova in Ophiuchus - N Oph 2018 No. 3 = PNV J17422408-2053088

Discovered by: C. Jacques, J. Barros, E. Pimentel, and P. Holvorcem, on behalf of the Brazilian Transient Search - BraTS (at SONEAR Observatory, Oliveira, Brazil); via TOCP

Discovery magnitude: unfiltered CCD magnitude 11.1 (on three frames, 10-sec exposure, using an astrograph 11" f/2.2 + CCD camera)

Discovery date: 2018 August 08.9596 UT

Alert Notice 645: Monitoring of LPVs for Maser Study

Note: This campaign has been extended to October 2020 and the list of targets has been revised. Please see AAVSO Alert Notice 687 for details. - Elizabeth O. Waagen, December 4, 2019

July 31, 2018: Michael Stroh (Ph.D. candidate, University of New Mexico) requests AAVSO assistance in monitoring 19 LPVs in support of a VLA campaign studying SiO masers. AAVSO monitoring begins now and goes through October 2019.

Alert Notice 644: FO Aqr monitoring requested in faint-state study

Nightly monitoring of FO Aqr is requested throughout the month of October 2022. Many thanks.  -  Elizabeth O. Waagen, 3 October 2022

Please continue observing FO Aqr according to the revised observing cadence given in the next paragraph.  -  Elizabeth O. Waagen, 1 February 2021

Alert Notice 643: Monitoring for Red Dots #2 campaign

July 25, 2018: John Strachan (Ph.D. candidate, Queen Mary University of London) and Dr. Guillem Anglada-Escude (Queen Mary University of London) have requested AAVSO assistance in the monitoring of three M dwarf stars as part of the Red Dots #2 campaign.

Alert Notice 642: ASASSN-18pe observing campaign

July 24, 2018: Dr. Matt Darnley (Astrophysics Research Institute, Liverpool John Moores University) and the AAVSO are requesting monitoring of ASASSN-18pe, the cataclysmic variable (possible long period dwarf nova) discovered 2018 July 10 by the ASAS-SN program (J. Strader et al. ATel #11867) at magnitude V = 15.8.