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News and Announcements

13 November Special Notice #309: Next Set of HST COS targets announced

* revised November 20, 2012: CW Mon - scheduled observation dates and times are 2012 November 30 20:54:49 through December 1 02:26:15 UT; see details in AAVSO Special Notice #311.

13 November Special Notice #308: Observations crucial starting tonight for FL Psc (ASAS J002511+1217.2)

November 13, 2012: The HST COS far ultraviolet observations of the WZ Sge-type cataclysmic variable FL Psc (ASAS J002511+1217.2) will be taking place 2012 November 15 22:48:37 UT through November 16 04:49:58 UT (AAVSO Special Notice #305

09 November New eJAAVSO preprint: ROAD intensive observations of variables stars

ej223: "ROAD (Remote Observatory Atacama Desert): Intensive Observations of Variable Stars" by F.-J. Hambsch

08 November Special Notice #307: Observations crucial tonight for SDSS J001153.08-064739.1

November 8, 2012: The HST COS far ultraviolet observations of the dwarf nova SDSS J001153.08-064739.1 have been scheduled for 2012 November 9 20:42:29 UT through November 10 04:57:33 UT (AAVSO Special Notice #304).

Your observations from tonight are crucial to confirm whether the target is at minimum (which it must be for HST to observe it).

07 November Special Notice #306: Telluric standards for T Tau stars campaign spectroscopists

7 November 2012: Further to AAVSO Alert Notice 473 ( alert-notice/473), Principal Investigator Darryl Sergison (University of Exeter) requests that spectroscopists planning to observe the targets RY Tau, DN Tau, and/or DR Tau image the corresponding telluric standards below at the same time:

Telluric standard for RY Tau
HD 283567     B9     Vmag = 10.38   RA 04 20 33.072  Dec +28 39 08.55

06 November 101st Annual Meeting of the AAVSO - Archive

Meeting Archive Materials:

06 November Alert Notice 473: T Tauri stars observing campaign

November 6, 2012:  Darryl Sergison (University of Exeter) has requested AAVSO assistance with a campaign he is organizing on six T Tauri stars. He writes: "In Autumn 2013 I [and my PhD supervisor Tim Naylor of Exeter University are] undertaking a new study into the nature of pre-main-sequence low mass stars, using time series optical spectroscopy and UV-Visual-IR build a clearer picture of the environment around young solar-type stars and characterise their various disc, accretion, and outflow structures.

05 November New eJAAVSO preprint: Period Analysis of 55 Semiregular (SR/SRa/SRb) Variables

ej222: "Period Analysis of AAVSO Visual Observations of 55 Semiregular (SR/SRa/SRb) Variables"
 by J. R. Percy and P. Jx Tan

05 November Special Notice #305: HST COS observations of FL Psc (ASAS J002511+1217.2) scheduled

November 5, 2012: Further to AAVSO Alert Notice 471 (Gaensicke, Patterson, and Henden), the HST COS (Cosmic Origins Spectrograph) far ultraviolet observations of THE NEXT TARGET from the list, the WZ Sge-type cataclysmic variable

                     FL Psc (ASAS J002511+1217.2),

05 November Publication deadlines to remember


December 15, 2012    AAVSO Annual Report     (Section Reports, Meeting Minutes, Treasurer's Report, Director's Report, Development)

December 15, 2012    AAVSO Newsletter          (any contributions)

31 October Special Notice #304: HST COS observations of SDSS J001153.08-064739.1 scheduled

October 31, 2012:  Further to AAVSO Alert Notice 471 (Gaensicke, Patterson, and Henden) and AAVSO Special Notice #298, the HST COS (Cosmic Origins Spectrograph) far ultraviolet observations of THE NEXT TARGET from the list, the dwarf nova-type cataclysmic variable

                           SDSS J001153.08-064739.1,

31 October Special Notice #303: VLBA and e-MERLIN observations of SS Cyg underway

October 31, 2012:  The cataclysmic variable SS Cyg is beginning to decline from what appears to be a narrow outburst, and was at visual magnitude 9.1 on 2012 October 30, according to observations in the AAVSO International Database.

31 October New eJAAVSO preprint: Ross variables revisited. II by W. Osborn and O. F. Mills

ej 221: "The Ross Variable Stars Revisited. II" by W. Osborn and O. F. Mills

29 October VStar version 2.14.0

A new version of VStar has just been released (the previous version was released in April 2012).

To get it, please visit and click "Download VStar Now".

26 October New eJAAVSO preprint: on Variability type determination and high precision ephemeris for NSVS 7606408

ej 220: "Variability Type Determination and High Precision Ephemeris for NSVS 7606408" by R. Furgoni

24 October Special Notice #302: HST COS observations of 1RXS J023238.8-371812 scheduled

October 24, 2012: Following on AAVSO Alert Notice 471 (Gaensicke, Patterson, and Henden, and AAVSO Special Notice #298 (, the HST COS (Cosmic Origins Spectrograph) far ultraviolet observations of THE NEXT TARGET from the list, the WZ Sge-type cataclysmic variable

24 October Four new eJAAVSO preprints

ej216: "BVRI Photometry of SN 2011fe in M101" by M. W. Richmond and H. A. Smith

ej217: "The Pulsation Period of the Hot Hydrogen-Deficient Star MV Sgr" by J. R. Percy and R. Fu

ej218: "Period Changes in RRc Stars" by J. R. Percy and P. J. Tan

ej219: "The Citation of Manuscripts Which Have Appeared in JAAVSO" by A. U. Landolt

24 October Special Notice #301: Retraction of Special Notice #300

October 23, 2012:  Multiple observers have checked the Hyades and found no evidence of the transient mentioned in by I. Shelton in ATel #4513.  There is no object visible in the field according to observations by Patrick Schmeer, Emmanuel Conseil, and Ulisse Munari.  Doug Welch notes that the object appears non-stellar on the image that was posted to Shelton's website, and suggests it may be the product of a cosmic ray hit.

23 October Two new eJAAVSO preprints

ej214: "VSX J071108.7+695227: a Newly Discovered Short-period Eclipsing Binary" by M. Damasso, et al.

ej215: "A Practical Approach to Transforming Magnitudes onto a Standard Photometric System" by D. Boyd

19 October Alert Notice 472: Monitoring of HD 5980 requested for multiwavelength campaign

October 19, 2012:  Dr. Noel Richardson (Universite de Montreal, formerly at Georgia State University) has requested monitoring of the Small Magellanic Cloud eclipsing binary HD 5980 (in Tucana) as part of a multiwavelength campaign he is coordinating to study this unusual system. Dr. Richardson writes:

17 October Solar Bulletin - Volume 68, Number 9

The September 2012 Solar Bulletin is now available!

11 October The AAVSO Newsletter - October 2012 - is published

AAVSO Newsletter 54 - October 2012

11 October Annual Meeting Reminder: Hotel Deadline extended!

Don't forget to register for the AAVSO Annual Meeting!

  • Update: The hotel reservation deadline has been extended to Friday, October 19th!
  • Abstract forms are still being accepted for our Saturday general paper session and poster session as well as our Friday special topic paper sessions. Slots are currently available in all sessions.

For more information please visit the Annual Meeting Description Page.  We hope to see you in November!

11 October New eJAAVSO: on the variability of V538 Cas by G. Holmberg

ej213: A Note on the Variability of V538 Cassiopeiae by G. Holmberg

10 October Special Notice #299: Observations needed TODAY of SDSS J164248.52+134751.4

October 10, 2012: Dr. Boris Gaensicke (leader of the consortium observing CVs with the HST COS instrument; see AAVSO Alert Notice 471 and AAVSO Special Notice #297 for details and instructions) writes with an urgent message:
"STScI would like an update on SDSS J164248.52+134751.4 by ~16UT TODAY (2012 October 10), when the star is not easily visible for most of our observers. Any observations from Europe early this evening will be most welcome."

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