AAVSO: CCD Views #330

!! THIS IS A SPECIAL EDITION OF CCD VIEWS !!

Table of Contents
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1. V2361 (N CYG 05) Rapid Decline
2. HD80606 Exoplanet Campaign

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1. V2361 CYG (was N CYG 05)* RAPID DECLINE

The new nova in Cygnus discovered on February 11, 2005 (AAVSO Alert Notice #313) has been fading rapidly, over 5 magnitudes in the last 7 days. CCDV observations are requested through the decline and then for a few days after it reaches minimum. This nova appears to be of the DQ Her type, a classification with few members thus this light curve is of some importance.

Please observe at least once per night. Observe with a V filter first. If you can, then follow in B and Ic. Take care to get the best precision you can.

Latest observations:

 FEB 22.7870     11.30  MXL    CCDI   EASILY DETECTED IN SINGLE I IMAGES    ERR: .06     
 FEB 22.7870    <15.4   MXL    CCDV   BASED ON 29 X 40 SEC STACKED V FRAMES
 FEB 21.7952     14.76  MXL    CCDV   21 X 40SEC STACKED FRAMES USED (6-CM APERTURE) ERR: .15 
 FEB 21.7952     10.64  MXL    CCDI   V-I COLOR INDEX = 4.12 +/- 0.16   ERR: .05

MXL RICHARD MILES STOURTON CAUNDLE UK

AAVSO Light Curve

AAVSO DQ Her Light Curve (1934 - 1954)

AAVSO Charts

Note the e-scale charts are for visual observers. Click on the "V2361.seq" link under "Sequence Photometry" for V and I measures by Richard Miles of the British Astronomical Association Variable Star Section. We are attempting to get fainter field photometry along with photometry in B. Go ahead and use the current measures for V and I observations and save any B images for reduction at a later date.

Transformation
This is a very red object (V-I > 4.1) so please apply transformation coefficients if you have them determined for your system. If you are able to transform your data then put "Transform: Yes" in the Comments Explained field of your observation, or click the "Transformed" button in WebObs or PCObs.

* Note: N Cyg 05 has been assigned the GCVS designation V2361 Cyg.

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2. HD80606 EXOPLANET CAMPAIGN

The next exoplanet transit campaign begins on February 24 when a transit window for HD80606 opens. An AAVSO web page for the campaign is here. Discussion and coordination has already begun via the AAVSO Photometry Discussion Group. The archives are available at:

http://mira.aavso.org/pipermail/aavso-photometry/2005-February/thread.html

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Good observing!

Aaron Price, AAVSO Technical Assistant (PAH)
Gary Walker, Chairman of the AAVSO CCD Committee (WGR)

Copyright 2005, American Association of Variable Star Observers
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