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AAVSO Newsletter 78 is now online

AAVSO Newsletter Number 78 (October 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 79, January 2019) is published.

AAVSO seeking an Editor for the Journal of the American Association of Variable Star Observers (JAAVSO)

Job Description

The non-profit American Association of Variable Star Observers (AAVSO) has begun a search for a volunteer Editor-in-chief for its research publication Journal of the American Association of Variable Star Observers (JAAVSO).  The JAAVSO is an electronic publication, which content is acknowledged in the Astrophysics Data System (ADS).

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.

Solar Bulletin - Volume 74, Number 08

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

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

LPV of the Month September, 2018

S Aurigae

A Carbon Star

Summary

This month's Long Period Variable (LPV) star, S Aur, should be a treat for Visual observers. S Aur is a fairly bright but very dark red Carbon star.  It’s B-V index is between ~3.5 to ~5, making it a very red object. (The B-V ratio seems to change over time, which might be investigated in the future with a focus on the B, V, and Ic bands.)

From Wikipedia:

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

August 24, 2018: The old nova GK Per (N Per 1901), which has dwarf nova (minor) outbursts, appears to be going into outburst, according to observations reported to the AAVSO. Recent observations include:

Alert Notice 648: Semiregular variable reclassified as symbiotic: outburst of ASASSN-V J195442.95+172212.6 = Vend47 (Sge)

August 14, 2018

Event: ASASSN-V J195442.95+172212.6 (TCP J19544251+1722281 = Vend47), originally classified as a semiregular variable, has been reclassified as a symbiotic variable as a result of its being discovered in outburst by Robert Fidrich during the course of his "Vendégcsillag-kereső" (Guest Star Hunter) nova patrol program. Subsequent spectroscopy confirmed the nature of the object as a symbiotic variable.

Solar Bulletin - Volume 74, Number 07

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

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

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

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