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Alert Notice 656: Chandra observation date revised for XZ Tau and HL Tau

November 7, 2018: Further to AAVSO Alert Notice 654, the date and time of the Chandra observations of the T Tauri stars XZ Tau and HL Tau scheduled for 2018 November 15 have been revised to November 11 and 12.

Dr. David Principe (MIT) informs us that Chandra is now scheduled to observe the targets on:

2018 Nov. 11 17:37 - Nov. 12 00:01 UT
2018 Nov. 12 08:01 - Nov. 12 14:27 UT

LPV of the Month November, 2018

S Ori

Deep Red image of S Ori from SDSS

Overview

S Ori is a Mira type Long Period Variable (LPV).  It has an Oxygen rich spectrum range of M6.5e-M9.5e.

It’s position in the sky is at 05 29 00.90  -04 41 32.8 which makes it viewable from both the northern and southern hemisphere.  S Ori is a “winter” star in the northern hemisphere so it’s now in “season. 

Alert Notice 655: Anticipated secondary eclipse of b Persei by its third star in November 2018

Note: Text revised October 30 to include date and time on which the predicted eclipse window is centered. It was further revised November 2 to correct the SAO number of b Per and to correct the position of the check star. - E. O. Waagen

Alert Notice 654: XZ Tau and HL Tau monitoring needed for Chandra observations

Note: The November 15 observation with Chandra has been rescheduled to 2018 Nov. 11 17:37 - Nov. 12 00:01 UT and 2018 Nov. 12 08:01 - Nov. 12 14:27 UT. Please see AAVSO Alert Notice 656 for details. - Elizabeth O. Waagen

Alert Notice 653: Nova in Norma: N Nor 2018 = PNV J16143400-5330050

October 26, 2018

Event: Nova in Norma - N Nor 2018 = PNV J16143400-5330050

Discovered by: Robert Kaufman (Bright, Victoria, Australia)

Discovery magnitude: 10.5 (DSLR green channel, approximately visual band)

Discovery date: 2018 October 13.414 UT

Coordinates (2000.0): R.A. 16 14 32.91    Decl. -53 30 15.2   (from VSX)

Solar Bulletin - Volume 74, Number 09

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

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

Gaia plugin for VStar

Thanks to a fantastic volunteer effort by Cliff Kotnik and David Benn, we now have a plugin availble for VStar which can be used to view and plot data on variable stars directly from the Gaia website (DR 2).

To learm more about it, please see Cliff's forum post:
https://www.aavso.org/gaia-plugin-now-available-vstar

Alert Notice 652: Monitoring of nova-like variables in support of Chandra observations

October 11, 2018: Dr. Koji Mukai (NASA-Greenbelt Space Flight Center) has requested AAVSO assistance in monitoring several nova-like variables in support of upcoming Chandra observations. The first target, KQ Mon, is scheduled to be observed with Chandra during the week of 2018 October 15-22.

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).

Pages

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484