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Special Notice #241: New Supernova in M51

June 3, 2010: A new supernova in M51 was discovered by A. Riou and confirmed by several sources, including the Palomar Transient Factory (Silverman et al., ATEL 3398). It is located at 13:30:05.08 +47:10:11.2 J2000 and has a magnitude of about 13.5. Nice images of the supernova can be found at: http://6888comete.free.fr/fr/imageSN.htm PTF also obtained a spectra from Keck, indicating that this is a type II supernova with a relatively blue continuum with P-Cygni profiles in the Balmer series.

Women in the Geosciences: Past, Present, and Future

The following announcement is made on behalf of long time AAVSO observer/member Dr. Kristine Larsen:

Special Notice #240: Possible Nova in Scorpius [V1312 Sco]

June 1, 2011: John Seach (Chatsworth Island, NSW, Australia) has identified a transient object on 3 images taken with a digital SLR camera. The coordinates are: RA 16 55 11 Dec -38 38 12 J2000 The discovery magnitude on June 1.40UT was 9.5 No object was seen on images taken the previous night, and no minor planet, comet or variable star is known at that position. He also does not see any DSS object at those coordinates. Confirmation of this object is requested.

AAVSO Annual Report 2009-2010

The revised AAVSO Annual Report 2009-2010 (with changes to the Headquarters staffing section) is now online:

http://www.aavso.org/annual-report

Minor Planet Pebble

AAVSO member, observer and science educator Dr. Pebble Richwine has had a minor planet named in her honor - 268242 Pebble. Pebble did her PhD in science education at the University of Arizona where her dissertation was on using variable stars in elementary school science education. She's given talks at many AAVSO meetings and is currently a science educator in Georgia.

Here is the official citation:

Reporting DSLR Data

Over in the Citizen Sky forums we have begun a discussion about how to properly report DSLR data.
Click below to read the guidelines:

http://www.citizensky.org/forum/report-dslr-data

Alert Notice 441: Monitoring of Bright Giant Variables requested in support of ground-based spectroscopy and for long-term study

May 27, 2011: Dr. Steve Howell (NASA) and Dr. Travis Rector (University of Alaska, Anchorage) have requested AAVSO observations of several bright giant variable stars of diverse classes.  This request is for immediate support of spectroscopic observations to be made at Kitt Peak National Observatory between 2011 May 30 and 2011 June 01 (JD 2455712 - 714).  However, observers are encouraged to continue long-term monitoring of these objects.

New ejaavso preprint: "CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey..."

"CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey—First Results From Low Resolution Spectra" by F. Teyssier

 

http://www.aavso.org/ejaavso

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