Alert Notice 325: 1955+22C Var Vul 05 - New variable near M27
August 23, 2005
Subject: 1955+22C VAR VUL 05 - NEW VARIABLE NEAR M27
Object: 1955+22C VAR VUL 05
Event: New Variable in Vulpecula
Discovered Independently By:
- Joerg Hanisch, Gescher, Germany
- Hans-Goeran Lindberg, Skultuna, Sweden
- 15.8 CCD clear +/-0.4 (C11 at 2699 mm FL, unfiltered SXV-H9 camera at 3x3 binning) - Hanisch
- 15.27 C (pix_H5 Compstar 16.6) - Lindberg
- (via Wolfgang Renz, Karlsruhe, Germany) announced August 21 (image taken Aug 17/18 UT ) - Hanisch
- announced August 21 (image taken Aug. 18 21:45-21:57 UT) - Lindberg
Position: Measured by Hanisch (reported by Renz)
R.A. = 19h 59m 51.29s (2000.0)
Decl. = +22o 42' 32.3" (2000.0)
Spectra: none to date
AAVSO Chart(s): 'f' scale chart is available at: http://www.aavso.org/cgi-bin/searchcharts3.pl?name=var%20vul%2005 [obsolete link, create charts using VSP at http://www.aavso.org/vsp ]
Report Object to the AAVSO as: 1955+22C VAR VUL 05
Observations Reported to the AAVSO (via [aavso-photometry] and [baavss-alert] lists):
Aug 16.937 UT (prediscovery), 15.6 +/- 0.2 CCD, Nick Quinn, Steyning, W. Sussex, England; 21.916, 16.17 CCDV +/- 0.01 (ensemble of 5 stars in Henden's M27 photometry file),David Boyd, West Challow Observatory, Oxfordshire, England; 21.917, 16.00 CCDI +/- 0.04, Boyd; 21.935, 16.69 CV (60-s unfiltered, USNO A2.0), Diego Rodriguez, Madrid, Spain; 21.939, 16.67 CV (60-s unfiltered, USNO A2.0), Rodriguez; 22.2413 15 CCD w/green filter (star shows marginally; 30s exposure, Rent-A-Scope facility, New Mexico), Arto Oksanen, Jyvaskyla, Finland; 22.998, 16.16 CCDV +/- 0.02 (photometry as before), David Boyd; 22.997, 15.82 CCDIc +/- 0.05 (photometry as before), Boyd.
a. Robert Bateman, Weaverville, CA, reports (via Renz) nothing in area down to magnitude 19 two weeks earlier.
b. Renz reports a faint USNO-B1.0 star nearby at (2000) 19:59:51.04 +22:42:35.4, R2 mag 17.31; no very red star at or close to location.
c. Arne Henden, AAVSO, reports the nearest star in his photometry files is at: (2000) 19:59:51.15 +22:42:30.6, Vmag 19.378, (B-V) 1.246. He summarizes that the object is blue, has an amplitude of at least 9 magnitudes (according to photometry in his files), and is probably a new WZ Sge object.
d. Astrometry (J2000) reported by: David Boyd (USNOB1.0 reference): 19:59:51.283 (+/-0.28) +22:42:32.13 (+/-0.29) Diego Rodriguez (USNOA2.0 reference): 19:59:51.27 Dec +22:42:32.0 Arto Oksanen (USNOA2.0 reference): 19:59:51.36 +22:42:32.0
e. CCD observers are urged to look for superhumps and possible WZ Sge-signature behavior to help confirm nature of this star.
Congratulations to Joerg Hanisch and Hans-Goeran Lindberg on their discoveries!
Many thanks for your valuable astronomical contributions and your efforts.
Elizabeth O. Waagen
Senior Technical Assistant
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
An Alert Notice archive is available at the following URL:
Subscribing and Unsubscribing may be done at the following URL:
Please support the AAVSO and its mission -- join or donate today: