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News and Announcements

15 June New Observing Section Created to study Young Stellar Objects (YSOs)

 Michael Poxon has taken it upon himself to head a new AAVSO section on his favorite class of variable star: Pre-Main Sequence Stars (YSO/PMS). The AAVSO has had a long history of working with such objects, especially the "Orion variables" that were monitored by many visual observers for years.

15 June New Logo Contest Deadline is Close

As part of the AAVSO's Centennial Celebrations we are holding a contest to design a new logo for the organization. This is just a quick reminder that the deadline for submission to the contest is July 1. As of this posting we have five submissions. Click here for more information on the logo contest and instructions on how to submit a design. 

14 June The Cepheid Variable M31_V1: Hubble's First Cepheid

08 June 20% Discount on New Centennial Book (updated)

July 21 Update: The books are here! The AAVSO has 100 copies of the book that we are selling at the same Cambridge Press discounted rate of $80. So please order from the AAVSO store and help support the organization. We have the books in stock for immediate shipment.

But wait, there's more! If you add an order for one of our limited edition Centennial T-Shirts, we will take $15 off your total order at checkout.

08 June JAAVSO vol. 39, nr. 1, is published

The Journal of the American Association of Variable Star Observers (JAAVSO), Volume 39, Number 1, 2011, is now available for downloading and for hardcopy purchase.


http://www.aavso.org/jaavso-v39n1

07 June AAVSO Eclipsing Binary Ephemeris for 2011 available

The 2011 AAVSO Eclipsing Binary Ephemeris, prepared by Gerry Samolyk, is now available online at

http://www.aavso.org/eclipsing-binary-ephemerides

Good observing!

07 June Special Notice #243: Pre-SN 2011dh images of M51 requested

Pre-SN 2011dh images of M51 requested

06 June Margaret Mayall Assistantship Open for Applications for Summer 2011

(update: this position has been filled.)

03 June AAVSO Special Notice #242

SN 2011dh = Supernova in M51 = PSN J13303600+4706330


June 3, 2011: As an update to AAVSO Special Notice #241 (http://www.aavso.org/aavso-special-notice-241), the supernova in M51 has been designated SN 2011dh. Discovery, classification, and observation information have been published in IAU CBET 2736 (Daniel W. E. Green, ed.).

Coordinates: 13:30:05.08 +47:10:11.2  (J2000.0)

03 June Alert Notice 442: Nova Scorpii 2011 = PNV J16551100-3838120

June 3, 2011

Event: Nova Scorpii 2011 = PNV J16551100-3838120

Discovered by: John Seach, Chatsworth Island, NSW, Australia

Discovery Date: 2011 June 1.40 UT

Discovery Magnitude: magnitude 9.5 on three CCD images (limiting
mag 11.0) taken with a digital SLR camera (+ 50-mm f/1.2 lens
+ orange filter).  

Coordinates: R.A. = 16:55:11, Decl. = -38:38:12 (equinox 2000.0)

Spectra: Three sets of spectra have been reported:

03 June AAVSO Special Notice #241

New Supernova in M51

03 June Women in the Geosciences: Past, Present, and Future

The following announcement is made on behalf of long time AAVSO observer/member Dr. Kristine Larsen:

01 June April Solar Bulletin

The April Solar Bulletin has been posted.

01 June AAVSO Special Notice #240

Possible Nova in Scorpius

01 June AAVSO Annual Report 2009-2010

The revised AAVSO Annual Report 2009-2010 (with changes to the Headquarters staffing section) is now online:

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

01 June Minor Planet Pebble

AAVSO member, observer and science educator Dr. Pebble Richwine has had a minor planet named in her honor - 268242 Pebble. Pebble did her PhD in science education at the University of Arizona where her dissertation was on using variable stars in elementary school science education. She's given talks at many AAVSO meetings and is currently a science educator in Georgia.

Here is the official citation:

01 June New ejaavso preprint: "Edward A. Halbach 1909—2011" by G. Samolyk

"Edward A. Halbach 1909—2011" by G. Samolyk

http://www.aavso.org/ejaavso

31 May Reporting DSLR Data

Over in the Citizen Sky forums we have begun a discussion about how to properly report DSLR data.
Click below to read the guidelines:

http://www.citizensky.org/forum/report-dslr-data

27 May Alert Notice 441: Monitoring of Bright Giant Variables requested in support of ground-based spectroscopy and for long-term study

May 27, 2011: Dr. Steve Howell (NASA) and Dr. Travis Rector (University of Alaska, Anchorage) have requested AAVSO observations of several bright giant variable stars of diverse classes.  This request is for immediate support of spectroscopic observations to be made at Kitt Peak National Observatory between 2011 May 30 and 2011 June 01 (JD 2455712 - 714).  However, observers are encouraged to continue long-term monitoring of these objects.

26 May New ejaavso preprint: "CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey..."

"CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey—First Results From Low Resolution Spectra" by F. Teyssier

 

http://www.aavso.org/ejaavso

26 May David Benn Receives 2011 Director's Award

 

 

It was announced at the AAVSO Banquet, Saturday, May 21, 2011, that the 2011 recipient of the AAVSO Director's Award is David Benn of Klemzig, South Australia.

26 May Minor planet 12789 Salvadoraguirre named for AAVSO member!

Minor planet 12789 Savadoraguirre is named for AAVSO member/observer Salvador Aguirre, M.D. (observer code "ASA"), an avid amateur astronomer from Hermosillo, Mexico. He has conducted many observations of variable stars, asteroid occultations, meteors, and comets. He has also help popularize and coordinate amateur astronomical research within Mexico.

http://www.aavso.org/minor-planet-names-honor-aavso-members-and-observers

23 May Hubble Space Telescope Campaign Results

The Hubble Heritage Team recently issued a press release about the HST/AAVSO observing campaign for M31.

18 May Charts and Sequences Update May 2011

 

17 May Alert Notice 440: PEP Observing Campaign on P Cygni

May 17, 2011:  Ernst Pollmann, an active spectroscopist in Germany and leader of Active Spectroscopy in Astronomy, has requested the assistance of AAVSO photoelectric photometry (PEP) observers in a campaign to observe the S Doradus variable P Cygni through the 2011 observing season.

PEP data are needed for correlation with spectra of P Cyg obtained by Ernst and other spectroscopists as they study this very interesting star.

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