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Alert Notice 537: Observations of a secondary eclipse of b Persei requested

February 26, 2016: Dr. Donald F. Collins (AAVSO member, Swannanoa, NC), Dr. Robert Zavala (US Naval Observatory, Flagstaff Station), and Jason Sanborn (Lowell Observatory) request high time-resolution observations of the bright eclipsing star b Persei (not beta) during an expected secondary eclipse of the third star of the system as it is expected to pass behind the close orbiting stars of the system in the two weeks centered on March 7, 2016. Dr. Collins provides the information below.

AAVSO Bulletin 79 for 2016 published

AAVSO Bulletin 79 - Predicted Dates of Maxima and Minima for 381 Long Period Variables for 2016 is published and available on the AAVSO website. This publication covers the interval 1 January 2016 through 28 February 2017. All Bulletin-related materials may be found via the main Bulletin page.

Special Notice #413: SU UMa observations needed now

February 23, 2016: Deanne Coppejans (Department of Astrophysics, Radboud University Nijmegen) requests observations of the dwarf nova SU UMa now in order to determine its status. She and colleagues observed it on 20 February 2016 with the Very Large Array (VLA) and need to know whether it is (was) in outburst.

Observations of SU UMa in the AAVSO International Database from around the time of the VLA observations show it to be in quiescence:

Solar Bulletin - Volume 72, Number 01

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

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

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

AAVSO BRITE-Constellation Targets

 

Targets for October 2016 - March 2017

BRITE targets download

BRITE-Constellation Ground Based Observations Team (GBOT) links:

http://www.brite-constellation.at

Alert Notice 536: SS Cyg monitoring requested for radio campaign

February 8, 2016:  Further to AAVSO Special Notice #412, Dr. James Miller-Jones (International Centre for Radio Astronomy Research, Curtin University, Perth, Western Australia) and colleagues have requested AAVSO assistance in support of their multiwavelength (radio and optical) campaign on the dwarf nova SS Cyg. Close monitoring of SS Cyg and immediate reporting of observations to the AAVSO via WebObs is requested beginning now.

Special Notice #412: SS Cyg monitoring needed for radio campaign

February 4, 2016:  A multiwavelength (radio and optical) observing campaign on SS Cyg is underway, and AAVSO participation is urgently requested. An AAVSO Alert Notice will be issued February 5 with full details.

The purpose of this Special Notice is to alert observers right now to the need to monitor SS Cyg very closely and report your observations to the AAVSO via WebObs at once. It is likely to go into outburst very soon, and immediate reporting of outburst behavior is crucial to the success of the campaign.

AAVSO Newsletter 67, January 2016, is published

AAVSO Newsletter 67, January 2016 is now available to members

The AAVSO Newsletter is a periodic, general forum that supports our various observing programs with lists of new targets, observing programming ideas, and general information that spans a wide area of interest. Guest writers contribute pieces that can range from current events to book reviews.

Alert Notice 535: R Aqr observing campaign

Ongoing visual, photometric, and spectroscopic observations of R Aqr about once every 10 days are requested, both to detect and observe the next eclipse and to continue the light curve of this star that has been in the AAVSO observing program for over a century.   Elizabeth O. Waagen, August 2017

Solar Bulletin - Volume 71, Number 12

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

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

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

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