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News and Announcements

13 May New eJAAVSO preprint: Multi-Longitude Observation Campaign of KV Cancri


"Multi-Longitude Observation Campaign of KV Cancri:an RR Lyrae Star with Irregular Blazhko Modulations"

by Pierre de Ponthière, Michel Bonnardeau, Franz-Josef (Josch) Hambsch, Tom Krajci, Kenneth Menzies, Richard Sabo

09 May Special Notice #384: SBS 1108+574 HST/COS obs next week

May 9, 2014: The HST/COS observations of the cataclysmic variable SBS 1108+574 described in AAVSO Alert Notice 501 have been pushed back a few days. The new exact time of the observations is:

                 SBS 1108+574      2014 May 16 06:19:04 - 15:16:56 UT

09 May New eJAAVSO preprint: Seven Years of Globe at Night Data

Analysis of Seven Years of Globe at Night Data

by Jennifer J. Birriel, Constance E. Walker, and Cory R. Thornsberry


29 April Alert Notice 501: Monitoring requested for HST/COS observations of SBS 1108+574

April 29, 2014: Dr. Peter Garnavich (University of Notre Dame) and Dr. Paula Szkody (University of Washington) have requested the help of AAVSO observers in monitoring the cataclysmic variable SBS 1108+574 (= CSS 120422:111127+571239) in support of upcoming Hubble Space Telescope observations. The HST COS (Cosmic Origins Spectrograph) will be carrying out far-ultraviolet spectroscopy of this target on 2014 May 12-13 UT.

17 April Solar Bulletin - Volume 70, Number 03

The March 2014 Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:

03 April AAVSO Newsletter 60 is now published

AAVSO Newsletter 60 (April 2014) is now available:

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.

02 April Alert Notice 500: Novae in Scorpius and Cygnus

April 2, 2014

1. Nova Scorpii 2014 = TCP J17154683-3128303
2. Nova Cygni 2014 = PNV J20214234+3103296

1. Nova Scorpii 2014 = TCP J17154683-3128303

Event: Nova Scorpii 2014 = TCP J17154683-3128303

Discovered by: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)

27 March Special Notice #383: Transient in Scorpius = TCP J17154683-3128303

March 27, 2014: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) report (via the IAU CBAT TOCP page, their discovery of a transient in Scorpius:
R.A. 17 15 46.83  Dec. -31 28 30.3  (2000.0)
2014 Mar. 26.84867 UT, magnitude 10.1 unfiltered CCD

24 March The AAVSO International Database Breaks Twenty-Five Million Observations!

Over the weekend the AAVSO International Database (AID) hit an important milestone.  We broke the twenty-five million mark!  We would like to express our appreciation to each and every observer who has contributed even a single observation to that total.

17 March Special Notice #382: SDSS J100658.40+233724.4 observations crucial now

March 17, 2014: HST/COS is scheduled to observe the the U Gem-type dwarf nova
SDSS J100658.40+233724.4 this Thursday. Observations are scheduled for:

SDSS J100658.40+233724.4 2014 March 20 05:35:00 through 14:17:27 UT

The scheduling team will likely make their final decision early WEDNESDAY (March 19), so your observations are essential tonight and tomorrow night.

14 March Alert Notice 499: Predicted occultation of Regulus

March 14, 2014: On 2014 March 20 at approximately 02:06 a.m. EDT (06:06 UT), an occultation of Regulus (alf Leo, magnitude 1.4 V) by the magnitude-12.4 V asteroid (163) Erigone will take place. The occultation track includes Bermuda and northwest along a corridor stretching from the mid-Atlantic USA through Ontario, Canada.

14 March Solar Bulletin - Volume 70, Number 02

 The February 2014 Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:

10 March Alert Notice 498: Nova Cephei 2014 = TCP J20542386+6017077

March 10, 2014:

06 March Annual Report for 2012-2013 is now online

Annual Report of the AAVSO for 2012-2013

05 March Special Notice #381: HST/COS observations of SDSS J100658.40+233724.4

March 5, 2014: HST/COS are being scheduled for the U Gem-type dwarf nova SDSS J100658.40+233724.4, the 40th and final target of the major CV observing campaign organized in 2012 by Drs. Boris Gaensicke, Joseph Patterson, Arne Henden, and 13 other astronomers (see AAVSO Alert Notice 471 and note below). A precise time will be announced later, but the scheduled HST observing window is:

SDSS J100658.40+233724.4  2014 Mar. 20 or 21 UT (to be determined)

27 February AAVSO Bulletin 77 for 2014

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2014

21 February Asteroids Mikesimonsen and Mariomotta

Congratulations to AAVSO staff member Mike Simonsen, and to AAVSO Past President Mario Motta who each have had an asteroid named in their honor by the IAU Minor Planet Center.

The official citations read as follows:

(367732) Mikesimonsen = 2010 UT62 Discovered 2005 May 4 by J. Bedient at Faulkes Telescope. Mike Simonsen (b. 1956) is a talented musician, an accomplished horticulturalist, a popularizer of astronomy, and a leader in the study of variable stars.

18 February New CHOICE courses offered for spring

Registration is now open for three CHOICE courses being offered this spring.

CHOICE: How To Use VPHOT (March 17 - April 11)

CHOICE: Variable Star Classification and Light Curves (April 14 - May 9)

CHOICE: How To Use VStar (May 12 - June 6)

Courses are $30 for members and $50 for non-members.
(The VPHOT course is open to members only.)

11 February Alert Notice 497: Nova Sagittarii 2014 = PNV J18250860-2236024 AND Erratum

February 11, 2014

1. Event: Nova Sagittarii 2014 = PNV J18250860-2236024

Discovered by: Sigeru Furuyama (Tone-machi, Ibaraki-ken, Japan) and reported by S. Nakano (Sumoto, Japan)

Discovery magnitude: unfiltered CCD magnitude 8.7, using a 200-mm f/2.8 camera lens + BJ-42L camera

Discovery date: 2014 Jan. 26.857 UT

Coordinates: R.A. 18 25 08.60  Decl. = -22 36 02.4  (2000.0)

07 February Alert Notice 496: Outburst of the recurrent nova V745 Sco

February 7, 2014

Event: Outburst of the recurrent nova V745 Sco

Discovery by: Rod Stubbings (Tetoora Road, VIC, Australia)

Discovery magnitude: 9.0 (visual)

Discovery date: 2014 February 6.694 UT

Coordinates:  R.A. 17 55 22.27   Dec. -33 14 58.5  (2000.0)

06 February Aviso Especial #380: Erupción reportada de la nova recurrente V0745 Sco

06 February Special Notice #380: Reported outburst of the recurrent nova V0745 Sco

February 6, 2014: Rod Stubbings (observer code SRX; Tetoora Road, Victoria, Australia) reports an outburst of the recurrent nova V0745 Sco (aka Nova Sco 1937). Stubbings reports the nova at a visual magnitude of 9.0 on 2014 February 6.694 UT (JD 2456695.194). He previously observed the field on 2014 February 5.696 and found the star fainter than 13.0, indicating that this outburst began within the past 24 hours.

03 February La IAU le asigna a asteroides el nombre de importantes observadores de AAVSO

El Minor Planet Center del Smithsonian Astrophysical Observatory en Cambridge, Massachusetts, homenajeó recientemente a los observadores de AAVSO Edward A. Halbach y William B. Albrecht nombrando dos planetas menores en su honor en la Circular de Planetas Menores de enero.

31 January IAU Names Asteroids for Prominent AAVSO Observers

The Minor Planet Center, Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, recently honored AAVSO observers, Edward A. Halbach and William B. Albrecht, by naming two minor planets in their honor in January's Minor Planet Circular

22 January Alerta de AAVSO 495: Brillante supernova de tipo Ia PSN J09554214+6940260 y campaña de observación

22 de enero de 2014

Evento: Supernova en M82 (Osa Mayor) = PSN J09554214+6940260

Descubierta por: Stephen J. Fossey (University College London Observatory)

Magnitud al descubrimiento: 11,7 V

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