THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 http://www.aavso.org * * * AAVSO NEWS FLASH * * * Subject: 1810+20 YY HER 1848+26 CY LYR No. 1118 1544+28A R CRB (Update) February 27, 2003 ---------------------------------------------------------------------------- 1810+20 YY HERCULIS The dwarf nova type (ZAND subclass) cataclysmic variable YY HER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 27.5370 12.9 CCDV JM FEB 17.4960 12.1 CCDV JM JAN 30.5160 12.9 CCDV JM FEB 23.5030 11.9 CCDV JM FEB 02.5180 12.9 CCDV JM FEB 26.1570 12.1 SJZ FEB 09.5130 12.8 CCDV JM FEB 27.4720 11.9 CCDV JM Observations in the AAVSO International Database indicate that the last outburst of YY Her occurred in May 1993, reaching magnitude 11.3 in July, slowly declining over the next year to 13.6, then rebrightening to 12.3 in early 1995, and finally declining to its normal 13th magnitude minimum by September 1995. ---------------------------------------------------------------------------- 1544+28A R CORONAE BOREALIS R CRB continues to fade (see AAVSO News Flash #1109 for the announcement of this recent fading), as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 12.5000 6.7 WI FEB 19.0200 8.5 GRL FEB 12.9257 6.8 TKK FEB 19.1535 8.2 CPS FEB 12.9965 6.9 SSW FEB 19.1854 7.8 OCR FEB 13.1076 6.6 OCR FEB 19.2256 8.3 ABG FEB 13.1319 7.0 CPS FEB 19.2882 8.0 VWA FEB 13.1909 6.9 ABG FEB 19.8521 8.5 VJA FEB 13.2012 6.8 BXA FEB 19.9590 8.7 ABG FEB 13.2396 7.2 NDA FEB 20.0500 8.9 GRL FEB 13.2500 6.9 OJR FEB 20.1597 8.3 OCR FEB 13.2549 6.8 KMA FEB 20.2263 8.7 ABG FEB 13.2924 6.7 VWA FEB 20.2979 8.4 VWA FEB 13.4479 6.6 CLQ FEB 20.3056 8.5 SXN FEB 13.4493 6.5: CGF FEB 20.3681 8.6 SHA FEB 13.4650 6.7 WEF FEB 20.4722 8.9 WI FEB 13.5000 6.9 WI FEB 20.9375 9.4 ABG FEB 13.9993 7.0 PIV FEB 20.9931 8.8 OJR FEB 14.0520 6.8 OCR FEB 21.0300 9.2 GRL FEB 14.1900 7.0 GRL FEB 21.2048 9.0 OCR FEB 14.2667 6.9 SXN FEB 21.2118 9.6 ABG FEB 14.2833 6.8 SHA FEB 21.2931 9.1 VWA FEB 14.4222 6.8 CGF FEB 21.8500 9.4 VJA FEB 14.4444 6.7 CLQ FEB 21.9493 9.5 PIV FEB 14.4500 7.0 WEF FEB 21.9667 9.5 SSW FEB 14.9049 7.1 VJA FEB 21.9861 9.4 KWO FEB 15.0215 7.0 BVE FEB 22.0479 9.4 OCR FEB 15.1375 6.9 OCR FEB 22.2277 9.8 ABG FEB 15.1736 6.9 KWO FEB 22.2743 9.9 VWA FEB 15.2285 7.1 CPS FEB 22.4300 9.7 SJE FEB 15.2360 6.9 PYG FEB 22.4756 10.1 DEQ FEB 15.3396 7.0 VWA FEB 22.8569 10.3 VJA FEB 16.3236 7.2 VWA FEB 23.0229 10.6 ABG FEB 16.4930 7.2 DEQ FEB 23.0600 10.5 PYG FEB 16.9722 7.6 ABG FEB 23.1201 10.1 OCR FEB 17.1142 7.8 BXA FEB 23.8257 10.9 VJA FEB 17.1534 7.4 OCR FEB 23.8833 11.1 ABG FEB 17.1847 7.7 ABG FEB 24.3826 11.2 VWA FEB 17.2375 7.3 CPS FEB 24.9027 12.1 ABG FEB 17.3014 7.2 VWA FEB 25.0306 12.0 HHU FEB 17.4583 7.6 WJD FEB 25.0798 11.5 OCR FEB 17.8715 7.6 VJA FEB 25.4389 11.9 HAB FEB 17.9792 7.8 SSW FEB 25.8229 12.4 VJA FEB 17.9861 7.8 ABG FEB 25.9326 12.2 ABG FEB 17.9990 7.6 PYG FEB 26.0500 12.1 GRL FEB 18.1800 8.0 GRL FEB 26.1400 12.3 SJZ FEB 18.2006 7.9 ABG FEB 26.1486 12.4 OCR FEB 18.2382 7.5 CPS FEB 26.3438 12.6 KMA FEB 18.2500 7.6 OJR FEB 26.4264 12.1 CGF FEB 18.2882 7.5 VWA FEB 26.9222 12.6 ABG FEB 18.8750 8.1 VJA FEB 27.1300 12.6 GRL FEB 18.9611 8.3 ABG FEB 27.2486 12.2 SXN FEB 18.9990 8.1 PYG FEB 27.4257 12.2 CGF ---------------------------------------------------------------------------- 1848+26 CY LYRAE The dwarf nova type cataclysmic variable CY LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 11.4000 <14.0 CGF FEB 27.4292 13.1 CGF FEB 14.4000 <13.6 CGF ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: ABG - B. ANDRESEN, NORWAY OJR - J. OSORIO, SPAIN BVE - E. VAN BALLEGOIJ, NETHERLANDS PIV - I. PERETTO, ITALY BXA - A. BARANSKY, UKRAINE PYG - G. POYNER, ENGLAND CGF - G. CHAPLE JR., USA SHA - H. SMITH, USA CLQ - L. CASON, USA SJE - J. SMITH, USA CPS - P. CLOESEN, BELGIUM SJZ - J. SPEIL, POLAND DEQ - E. DUTTON, USA SSW - S. SWIERCZYNSKI, POLAND GRL - B. GRANSLO, NORWAY SXN - M. SIMONSEN, USA HAB - R. HAYS JR., USA TKK - K. TIKKANEN, FINLAND HHU - H. HAUTECLER, BELGIUM VJA - J. VIRTANEN, FINLAND JM - R. JAMES, USA VWA - A. VAN WERVEN, USA KMA - M. KOMOROUS, CANADA WEF - F. WEST, USA KWO - W. KRIEBEL, GERMANY WI - D. WILLIAMS, USA NDA - D. NANCE, USA WJD - J. WEST, USA OCR - C. OTTEN, BELGIUM Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Kerri Malatesta, Technical Assistant on behalf of Janet A. Mattei, Director ____________________________________________________________________________ Symbols may include: < = fainter than magnitude given (variable not seen) : = uncertain CCDV = Charge-coupled device with (V) filter If you would like to contribute to AAVSO NEWS FLASH, please send observations of unusual variable star activity to: observations@aavso.org Those who wish to subscribe (free of charge) or unsubscribe to NEWS FLASH may do so by visiting the following web page: http://www.aavso.org If you would like data from the AAVSO International Database for research purposes, please send your request to: Janet Mattei, AAVSO Director, at aavso@aavso.org An archive of past issues of the News Flash is available at the following web page: http://www.aavso.org/newsflash/ We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________