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Alert Notice 612: Nova Sco 2018 - PNV J17180658-3204279

January 31, 2018

Event: Nova in Scorpius  -  Nova Sco 2018 = PNV J17180658-3204279

Discovered by: Hideo Nishimura (Kakegawa, Shizuoka-ken, Japan), reported by S. Nakano (Sumoto, Japan)

Discovery magnitude: unfiltered CCD magnitude 11.0 (three 10-second images using DSLR with 200-mm f/3.2 lens)

Discovery date: 2018 January 17.869 UT
 
Coordinates (2000.0): R.A. 17 18 06.37  Decl. -32 04 27.7 (from VSX)

LPV of the Month February, 2018

Z Tauri

Z Tau is an interesting Mira that has been observed by AAVSO observers and members since 1904.  Nearly 6,000 observations are in the AID from over 400 different observers as can be seen in the light curve shown below which displays all observations in the AID.  It is not one of the Legacy LPV Program stars, however there is a good reason why it deserves some special attention! 

Alert Notice 611: Flaring of Blazar 3C 279

January 26, 2018: AAVSO member/observer Adolfo Darriba (Madrid, Spain) informs us that Dr. Dave Thompson, Multiwavelength Coordinator for the Large Area Telescope (LAT) of NASA's Fermi Gamma-Ray Telescope, on behalf of the Fermi LAT Collaboration has called for observations of the blazar 3C 279, which is undergoing a major gamma-ray flare.

Alert Notice 610: Anticipated primary eclipse of b Persei by the third star

January 26, 2018: An AAVSO campaign on the bright star b Per has been launched at the request of Dr. Donald F. Collins, who writes:

Solar Bulletin - Volume 73, Number 12

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

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

Alert Notice 609: Nova Muscae 2018 - PNV J11261220-6531086

January 15, 2018

Event: Nova in Musca - Nova Muscae 2018 = PNV J11261220-6531086

Discovered by: Rob Kaufman (Bright, Victoria, Australia)

Discovery magnitude: 7.0 V (on four frames, using Canon 650D and 55mm lens)

Discovery date: 2018 January 14.4861 UT

Coordinates (2000.0):  R.A. 11 26 15.16  Decl. -65 31 23.3
Position from VSX; measured by Daniel Bamberger (Marburg, Germany) on frames taken by Robert Fidrich (Bakonycsernye, Hungary).

PEP Observer's Guide now in French

Due to another outstanding volunteer effort by Bernard Candela, we are now able to offer a French language translation of the Photoelectric Photometry Observer's Guide.

Many thanks once again Bernard!

 

 

LPV of the Month January, 2018

JANUARY 2018

KHI CYGNI

Discovery

The German astronomer Gottfried Kirch discovered its variability in 1686, when in July of that year he observed that the star had disappeared from the sky, not being visible again until the month of October.

The data

AAVSO Newsletter 75 online

AAVSO Newsletter Number 75 (January 2018) has been published and is online. AAVSO members may download a high- or low-resolution version from here. This issue will be available to non-members when the next issue (Number 76, April 2018) is published.

JAAVSO volume 45, number 2, December 2017, print version now available

eJAAVSO

The Journal of the American Association of Variable Star Observers
Volume 45, Number 2, 2017

The printed version of this issue is now available from Createspace via the link below.

Volume 45, Number 2, 2017

Pages

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484