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Alert Notice 582: Nova Oph 2017 photometry requested for Swift TOO observations

June 15, 2017: Drs. Frederick Walter (Stony Brook University) and Paul Kuin (University College London) and colleagues have requested AAVSO observers' assistance in obtaining photometry of Nova Oph 2017 (TCP J17394608-2457555) in support of Target-of-Opportunity observations with Swift UVOT that have been triggered and are scheduled for the next ten days (2017 June 16 - 25), and possibly longer.

Solar Bulletin - Volume 73, Number 05

The May Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

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

JAAVSO Volume 45 Number 1 2017 is published

eJAAVSO

http://www.aavso.org/apps/jaavso/volumes/

The printed version of this issue will be available soon. Please watch for the announcement on our main web page.

The Journal of the American Association of Variable Star Observers
Volume 45, Number 1, 2017

Articles in This Issue

Alert Notice 581: Monitoring HD 148703 during upcoming eclipses

June 8, 2017:  Dr. Milena Ratajczak (University of Wrocław) has requested AAVSO observers' assistance in monitoring the very bright (V = 4.23) and very unusual eclipsing binary HD 148703 (HR 6143, N Sco) during its infrequent primary and secondary eclipses scheduled for 2017 June 11 and June 14, respectively.

Visual Observing Manual in Russian

Thanks to a fantastic volunteer effort by Dr. Nikolai Samus (of GCVS fame) we now have available a Russian translation of the AAVSO Manual for Visual Observing of Variable Stars.

DSLR Observing Manual in French

The AAVSO DSLR Observing Manual is now available in French!

Many thanks once again to Bernard Candela for all the hard work he put into producing this translation. We hope that our French-speaking members and observers will find this manual helpful and will share it with their colleagues.

To download a copy (free-of-charge), please visit the DSLR Observing Manual webpage.

In addition to English, this Manual is also available in Greek and Spanish.

Alert Notice 580: ASASSN-17fp rebrightening event and ongoing monitoring

May 24, 2017: ASASSN-17fp, discovered on 2017 April 28 and classified as a helium dwarf nova, was observed to be in outburst again on May 16 after fading 2.5 magnitudes from its original outburst. Dr. Tom Marsh (University of Warwick) and Dr. Elme Breedt (University of Cambridge) requested immediate time-series coverage.

Alert Notice 579: KIC 8462852 optical dipping event

Although this dip is over, the campaign is extended to request ongoing monitoring, as requested in Alert Notice 542 (20160408) and Alert Notice 532 (20151020). - June 2017

Alert Notice 578: Nova in Centaurus - ASASSN-17gk

May 23, 2017

Event: Nova in Centaurus - ASASSN-17gk

Discovered by: All Sky Automated Survey for SuperNovae (ASAS-SN, (K. Z. Stanek (OSU) et al., ATel #10387)

Discovery magnitude: 10.9 V

Alert Notice 577: SN 2017eaw in NGC 6946 (PSN J20344424+6011359)

Correction: The original announcement of this Alert Notice included the incorrect assignment of observations made by David Boyd to David Blane. The attribution has been corrected in the observations below. We extend sincere apologies to David Boyd for the error. -- EOW  May 17, 2017

May 16, 2017

Event: SN 2017eaw - bright supernova in NGC 6946 (Cepheus)

Discovered by: Patrick Wiggins (Tooele, UT)

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