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LPV of the Month August, 2018

R Leo Minoris

R LMi is an interesting Mira star that has been observed by AAVSO observers and members since 1865.  Over 21,000 observations are in the AID from over 900 different observers as can be seen in the light curve shown below which displays all observations in the AID.  It is one of the Legacy LPV Program stars.  It was observed initially in the 1860’s-1870’s before a cessation in observations occurred.  Reasonable coverage did not commence again until the establishment of the AAVSO in 1911.

Alert Notice 645: Monitoring of LPVs for Maser Study

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

July 27, 2018: Dr. Colin Littlefield (University of Notre Dame) writes:

"In both 2016 and 2017, my colleagues and I requested AAVSO campaigns on the intermediate polar FO Aquarii to study its first-ever faint states. In both campaigns, we were delighted with both the quality and quantity of the data that we received from AAVSO observers [AAVSO Alert Notices 545, 598).

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.

Alert Notice 641: V1490 Cyg multiwavelength campaign

July 24, 2018: Dr. Dirk Froebrich (University of Kent) has requested AAVSO observations to support their upcoming observations of V1490 Cyg. He writes:

"Background: We have recently discovered that the young star V1490 Cyg (situated in the Pelican Nebula IC 5070) is periodically occulted by material in its circumstellar disk(*). Our light-curves indicate a period of about 32 days, and the obscurations are comparable to UX-Ori type eclipses.

Solar Bulletin - Volume 74, Number 06

The June Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The June SID Data report is available here: https://www.aavso.org/sid-database

Alert Notice 640: Immediate Monitoring of VW Hyi Requested

July 5, 2018 : Dr. Christian Knigge has requested immediate monitoring of the  SU UMa-type dwarf Novae VW Hyi in order to promptly identify the next outburst. This outburst will trigger radio wavelength observations. As this object has never been detected in the radio, it is imperative that the radio observations be started as soon after outburst as possible to have the best chance of detection. 

AAVSO Newsletter 77 is online

AAVSO Newsletter Number 77 (July 2018) has been published and is online. AAVSO members may download a high- or low-resolution version from here. This issue will be available to non-members when the next issue (Number 78, October 2018) is published.

Alert Notice 639: CH Cyg coverage requested

Note from August 2019: Ongoing coverage is extremely important, with V and particularly B being given priority over Rc and Ic. As always, visual observations are requested and encouraged. - Elizabeth O. Waagen, August 28, 2019

Note from November 2018: CH Cyg recovered in early August from the fading episode described below. However, ongoing coverage is extremely important, with V and particularly B being given priority over Rc and Ic. As always, visual observations are requested and encouraged. - Elizabeth O. Waagen, November 29, 2018

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