News and Announcements
|24 November||Solar Bulletin - Volume 68, Number 10||
The October 2012 Solar Bulletin is now available!
|20 November||Special Notice #311: HST COS to observe CW Mon 2012 November 30 - December 1||
November 20, 2012: The HST COS far ultraviolet observations of the dwarf nova CW Mon will be taking place 2012 November 30 20:54:49 through 2012 December 1 02:26:15 UT (AAVSO Special Notice #309, www.aavso.org/aaso-special-notice-309).
|19 November||Eye candy from Bright Star Monitor South||
At the moment, I'm taking a short break from doing some programming and beta testing for our latest AAVSOnet telescope to come online, Bright Star Monitor - South. This is a twin of the Bright Star Monitor that ran in New Mexico for the past few years, but installed on the opposite side of the world. BSM-South is hosted by Peter Nelson (NLX) a few dozen miles east of Melbourne, Australia, and has been operating in a "hands-on" capacity for several months now.
|15 November||Special Notice #310: Continued observing of V452 Cas requested||
November 15, 2012: As announced in [baavss-alert] on 15 November 2012, Dr. Chris Lloyd (University of Sussex) has requested that the SU UMa-type dwarf nova V452 Cas continue to be observed in order to maintain the good historical coverage of its superoutbursts. He writes: "Over the past several years we have accumulated enviable coverage of V452 Cas' superoutbursts but the general monitoring has dropped off recently as people have moved on to more interesting objects.
|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 www.aavso.org/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).
|07 November||Special Notice #306: Telluric standards for T Tau stars campaign spectroscopists||
7 November 2012: Further to AAVSO Alert Notice 473 (www.aavso.org/aavso 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:
|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 photometry...to 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"
|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
|05 November||Publication deadlines to remember||
APPROACHING 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
|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 http://www.aavso.org/vstar-overview 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, www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #298 (www.aavso.org/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!