Skip to main content

front page news

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

Annual Report for 2013-2014 is now online

Annual Report of the AAVSO for 2013-2014

http://www.aavso.org/annual-report

Special Notice #403: GW Lib HST schedule set

April 16, 2015: Further to AAVSO Alert Notice 513, Dr. Paula Szkody (University of Washington) informs us that the HST observations for the cataclysmic variable GW Lib have been scheduled for

2015 April 22 04:04:36 - 09:00:06 UT.

Solar Bulletin - Volume 71, Number 3

The March Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:

http://www.aavso.org/solar-bulletin

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

Alert Notice 518: Observations of 2MASS J06593158-0405277 needed

April 15, 2015: Dr. Fabienne A. Bastien (Hubble Postdoctoral Fellow, Pennsylvania State University) has requested AAVSO assistance in monitoring the rare FU Ori object 2MASS J06593158-0405277 as part of a campaign to observe this T Tauri star from the optical to the infrared in the coming weeks.  

Special Notice #402: RW Aur more intense monitoring needed now

April 13, 2015: Further to AAVSO Alert Notice 514, the Chandra observations of the classical T Tauri star RW Aur (component A) have been scheduled and will take place

2015 April 16 6:30 - 17:37 UT

Special Notice #401: AM Her NuSTAR observations April 5

April 3, 2015: Further to AAVSO Alert Notice 517 (www.aavso.org/aavso-alert-notice-517), Dr. Axel Schwope (Leibniz Institute for Astrophysics Potsdam, Germany) informs us that the NuSTAR X-ray observations of AM Her will take place on

2015 April 5  15:35 UTC - April 6 19:15 UTC

These NuSTAR observations overlap with the XMM-Newton observations scheduled for April 6.

Filtered photometry with standard filter (BVRI) is requested using the cadence given in Alert Notice 517.  

Alert Notice 517: Monitoring of AM Her urgently requested in support of XMM-Newton and NuSTAR observations

April 2, 2015: Dr. Axel Schwope (Leibniz Institute for Astrophysics Potsdam, Germany) has requested AAVSO observers' assistance in monitoring the magnetic variable AM Her in support of upcoming XMM-Newton plus NuSTAR (Nuclear Spectroscopic Telescope Array) observations.

The XMM-Newton observations are scheduled for 2015 April 06 02:37:02-15:07:02 UT. The NuSTAR observations have not been made final yet but are expected to run longer. A Special Notice will be issued when the NuSTAR schedule is known.

Alert Notice 516: Nova Oph 2015 = PNV J17291350-1846120

April 2, 2015

Event: Nova Oph 2015 = PNV J17291350-1846120

Discovered by: Yukio Sakurai, Ibaraki-ken, Japan

Discovery magnitude: 12.2 unfiltered, using 180-mm f/2.8 lens

Discovery date: 2015 March 29.766 UT

Coordinates:  R.A. 17 29 13.58   Dec. -18 46 11.7  (2000.0)

Alert Notice 515: SN 2015F in NGC 2442 (PSN J07361576-6930230)

March 31, 2015

Event: Supernova in NGC 2442: SN 2015F = PSN J07361576-6930230

Discovered by: Libert A. G. Monard, Calitzdorp, Western Cape, South Africa

Discovery magnitude: 16.8 unfiltered CCD using a 35-cm RCX400 telescope (+SBIG ST8-XME camera)

Discovery date: 2015 March 9.789 UT

Coordinates:  R.A. 07 36 15.76   Dec. -69 30 23.0  (2000.0)
SN 2015F is located 40" west and 84" north of the center of NGC 2442.

Charts and Sequences Update March 2015

The following objects have new or revised sequences. If you observe any of these objects you should update your charts as soon as possible. You can download the entire list in .xlsx or .csv format below. Our sincere thanks to Tom Bretl and the charts and sequences team for their continued hard work.

 

Pages

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