News and Announcements
|01 May||New eJAAVSO preprint: Acquisition of Photometric Data||
(ej168): "The Acquisition of Photometric Data" by A. U. Landolt
|01 May||New eJAAVSO preprint: on RR Lyr stars||
(ej167): "Things We Don't Understand about RR Lyrae Stars" by H. A. Smith
|01 May||New eJAAVSO preprint: on Anne S. Young||
(ej166): "Anne S. Young: Professor and Variable Star Observer Extraordinaire" by K. Bracher
|30 April||arXiv Algol paper: Did the ancient egyptians record the period of the eclipsing binary Algol - the Raging one?|
|30 April||New eJAAVSO preprint: Non-Mira Pulsating Red Giants and Supergiants||
(ej 165): "Non-Mira Pulsating Red Giants and Supergiants" by L. Kiss, J. R. Percy
|30 April||New eJAAVSO preprint: on Dorrit Hoffleit...||
(ej164): "Variable Stars and Constant Commitments: The Stellar Career of Dorrit Hoffleit" by K. Larsen
|27 April||New eJAAVSO preprint: Young Stellar Objects...||
(ej163): "The Variability of Young Stellar Objects" by W. Herbst
|27 April||New eJAAVSO preprint: on Martha Stahr Carpenter...||
(ej162): "Reminiscences on the Career of Martha Stahr Carpenter: Between a Rock and (Several) Hard Places" by K. Larsen
|27 April||New eJAAVSO preprint: Walking With AAVSO Giants...||
(ej161): "Walking With AAVSO Giants—A Personal Journey (1960s)" by R. S. Kolman and M. Simonsen
|27 April||New eJAAVSO preprint: Cataclysmic Variables||
(ej160): "Cataclysmic Variables" by P. Szkody and B. T. Gaensicke
|26 April||New eJAAVSO preprint: John Goodricke, Edward Pigott...||
(ej159): "John Goodricke, Edward Pigott, and Their Study of Variable Stars" by Linda M. French
|26 April||New eJAAVSO preprint: The Hubble Plate of 1923||
(ej158): "The Hubble Plate of 1923: A Story of Pink Polyethylene" by D. R. Soderblom
|24 April||New eJAAVSO preprint: The AAVSO 2011 Demographic and Background Survey||
New eJAAVSO preprint (ej 157): "The AAVSO 2011 Demographic and Background Survey" by A. Price and K. B. Paxson
|23 April||Final Week of Astro-April: SEVEN more online talks!||
The AASVO's Citizen Sky Project has been producing a series of online talks as a part of a month-long celebration called Astro-April.
In the last couple of weeks we have presented 5 online talks on various astronomical subjects. (If you missed any of them, recordings are posted on the main Astro-April page.) The speakers have been engaging, the questions have been thoughtful, and we've given away $250 in "door" prizes!
|23 April||Charts and Sequences Updates April 2012||
The following stars have new or revised sequences since April 9, 2012. If you observe any of these objects please update your observing charts as soon as possible.
|22 April||Special Notice #278: Bright flaring of Blazar OJ 287||
April 22, 2012: The blazar OJ 287 (Cancer) has brightened from its low optical state to its high state and is flaring. The Astronomer's Telegram #4057 (S. Zola et al., http://www.astronomerstelegram.org/?read=4057) reports very high optical activity.
|21 April||Special Notice #277: Possible Nova in Sagittarius (PNV J17452791-2305213)||
April 21, 2012: The discovery of a possible nova in Sagittarius was posted on the IAU CBAT Transient Object Confirmation Page (TOCP, http://www.cbat.eps.harvard.edu/unconf/tocp.html).
|20 April||New eJAAVSO preprint: International Observing Campaign: Photometry and Spectroscopy of P Cygni||
"New eJAAVSO preprint (ej156): International Observing Campaign: Photometry and Spectroscopy of P Cygni"
by E. Pollmann and T. Bauer
|17 April||New Survey about AAVSO Strategic Direction & Operations||
In late 2011 we issued a survey focused on the demographics and astronomical background of our membership. The results have recently been published here.
We now have a new, follow up survey prepared. This one is focused on the strategic direction of the AAVSO and the operations of the organization. The survey asks questions about the future direction of the organization, staff, officers and council and much more.
|17 April||Bob Nelson's O-C files for EBs 2012 edition||
The AAVSO is happy to provide a copy of Bob Nelson's O-C files for Eclipsing Binaries for 2012. These files can be used for observation planning, and are a valuable resource for EB observers.
Thanks once again for Bob Nelson for providing this service to the EB community.
|17 April||Solar Bulletin - Volume 68, Number 3||
The March 2012 Solar Bulletin is now available.
|16 April||Demographic Survey Results and Google Map||
In late 2011 we asked you to fill out a membership demographic survey. Participation in the survey was remarkable, with 615 people responding. An analysis of the results have recently been submitted to the JAAVSO and accepted for publication. A pre-print can be downloaded via the link below.
Also, Kevin Paxson created a Google Map of members and observers, which can be viewed via the link below:
|13 April||AAVSO Newsletter 52 is now online||
AAVSO Newsletter 52, April 2012, is now online.
|13 April||Special Notice #276: No nova in Scutum (PNV J18562170-0852300)|
|12 April||Special Notice #275: Possible Nova in Scutum = PNV J18562170-0852300||
April 12, 2012: Tom Krajci (KTC, Cloudcroft, NM) reports that a possible nova in Scutum has been announced on the IAU CBAT TOCP page (http://www.cbat.eps.harvard.edu/unconf/tocp.html) as PNV J18562170-0852300. It was discovered at unfiltered magnitude 9.7 on 2012 April 12.7954 UT by Y. Sakurai, Japan, on two 10-second exposures using a digital camera + 180-mm f/2.8 lens. Nothing was visible on an image taken 2012 Apr. 9.79 UT.