Skip to main content

front page news

All nodes that have this tag will posted to the home page "Recent Activity" block

AAVSO Newsletter 75 online

AAVSO Newsletter Number 75 (January 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 76, April 2018) is published.

JAAVSO volume 45, number 2, December 2017, print version now available

eJAAVSO

The Journal of the American Association of Variable Star Observers
Volume 45, Number 2, 2017

The printed version of this issue is now available from Createspace via the link below.

Volume 45, Number 2, 2017

JAAVSO Volume 45 Number 2 2017 is published

eJAAVSO

http://www.aavso.org/apps/jaavso/volumes/

The printed version of this issue will be available soon. Please watch for the announcement on our main web page.

The Journal of the American Association of Variable Star Observers
Volume 45, Number 2, 2017

Articles in this issue

Solar Bulletin - Volume 73, Number 11

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

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

Solar Observing Guide in German

Thanks to an excellent volunteer effort by Ilka Petermann, the AAVSO's Solar Observing Guide is now available in German.

Click here to get to download (free-of-charge)

If you would like to translate the Guide into your native language, please contact Sara at AAVSO HQ. In addition to this new German version, we also have a French translation and Italian and Spanish versions are in progress.

Sunny skies!

2018 JD Calendar is now available

The 2018 Julian Day calendar is now available for viewing or downloading.

Alert Notice 608: TT Ari monitoring requested for VLA observations

December 1, 2017: Dr. Deanne Coppejans (Northwestern University) and colleagues have requested AAVSO assistance in monitoring the cataclysmic variable TT Ari in support of observations scheduled to be made with the Very Large Array (VLA) in December 2017.

Dr. Coppejans writes:

Alert Notice 607: MASTER OT J132104.04+560957.8 photometry urgently needed for XMM observations

December 1, 2017: Dr. Mark Kennedy (Jodrell Bank Centre for Astrophysics, University of Manchester) requests AAVSO observers' assistance in providing optical coverage of the polar MASTER OT J132104.04+560957.8 in support of observations with the XMM-Newton satellite scheduled for this Sunday, 2017 December 3, 08:35:31 UT - 16:38:51 UT.

The XMM-Newton observations themselves will not include an optical component, so photometry provided by AAVSO observers is essential for the interpretation of the X-ray data.

Alert Notice 606: Observing campaign on nova in Vela - ASASSN-17mt

November 17, 2017

Event: Nova in Vela (ASASSN-17mt) and associated observing campaign

Discovered by: ASAS-SN (K. Z. Stanek (Ohio State University) et al.; ATel #10772)

Discovery magnitude: V=11.3, using data from the quadruple 14-cm "Cassius" telescope at CTIO, Chile

Discovery date: 2017 September 24.39 UT

Coordinates (2000.0): R.A. 08 50 29.62   Decl. -47 45 28.3 (from VSX)

Solar Bulletin - Volume 73, Number 10

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

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

Pages

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