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: 0822+25 AT CNC No. 615 1612-54 HP NOR May 5, 2000 1846-01D N AQL 00 = CI Aql? (update) ---------------------------------------------------------------------------- 0822+25 AT CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable AT CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 30.1375 <14.0 SXN MAY 03.0688 12.8 BRJ APR 30.318 <14.0 LMK MAY 03.0833 13.0 MKJ MAY 01.3986 14.2 SRX MAY 03.8667 12.5 DPV MAY 02.1194 12.7 SXN MAY 04.2063 12.3 BTH MAY 02.317 12.9 LMK MAY 05.326 12.3 LMK MAY 02.4000 13.0 SRX ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 25.4882 <14.5 SRX APR 30.4396 12.9 SRX APR 26.4465 13.2 SRX MAY 01.4347 13.0 SRX APR 27.4368 13.0 SRX MAY 02.4410 13.0 SRX APR 28.4444 13.0 SRX MAY 04.8382 13.4 PEX APR 29.4417 13.0 SRX ---------------------------------------------------------------------------- 1846-01D N AQL 00 = CI Aql? We have received the following observations of the nova since the release of News Flash No. 612: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 29.986 9.4 RMQ MAY 02.6917 9.4 PEX APR 30.003 9.3 RMQ MAY 02.987 9.4 RMQ APR 30.0451 9.4 DPV MAY 03.0069 9.2 DPV APR 30.063 9.4 RMQ MAY 03.0450 9.1 SJZ APR 30.117 9.6: PYG MAY 03.2771 9.1 SXN APR 30.33 9.2 ZXI MAY 03.313 9.16 CCDV OCN APR 30.988 9.7 RMQ MAY 03.3477 9.2 BEB MAY 01.055 9.6 OB MAY 03.8125 9.4 PEX MAY 01.0868 9.1 DPV MAY 03.8694 9.4 PEX MAY 01.088 9.7 RMQ MAY 03.9410 9.1 DPV MAY 01.094 9.3 SPK MAY 03.9722 9.1 DPV MAY 01.122 9.2 SPK MAY 04.338 9.27 CCDV OCN MAY 01.132 9.2 SPK MAY 04.4458 9.8 HSG MAY 01.3097 9.1 SCE MAY 04.4743 9.3 LMK MAY 02.035 9.5 RMQ MAY 04.8021 9.4 PEX MAY 02.0694 9.2 DPV MAY 04.8931 9.4 PEX MAY 02.320 9.11 CCDV OCN MAY 05.3207 8.63 CCDV LIW MAY 02.324 9.12 CCDV OCN MAY 05.3229 8.63 CCDV LIW MAY 02.3819 9.3 BDT MAY 05.3454 8.63 CCDV LIW MAY 02.4141 9.2 LMK MAY 05.3473 8.64 CCDV LIW MAY 02.5000 9.0 BJS MAY 05.3512 8.65 CCDV LIW MAY 02.6882 9.3 PEX MAY 05.3688 9.2 BEB For LIW Observations, CCDV = CCD + broadband V ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BDT - D. BRANCHETT, USA OCN - S. O'CONNOR, CANADA BEB - R. BERG, USA PEX - A. PEARCE, AUSTRALIA BJS - J. BEDIENT, USA PYG - G. POYNER, ENGLAND BRJ - J. BORTLE, USA RMQ - M. RESZELSKI, POLAND BTH - T. BURROWS, USA SCE - C. SCOVIL, USA DPV - P. DUBOVSKY, SLOVAKIA SJZ - J. SPEIL, POLAND HSG - G. HANSON II, USA SPK - P. SCHMEER, GERMANY LIW - W. LILLER, CHILE SRX - R. STUBBINGS, AUSTRALIA LMK - M. LINNOLT, USA SXN - M. SIMONSEN, USA MKJ - J. MCKENNA, USA ZXI - X. ZHU, USA OB - M. OVERBEEK, SOUTH AFRICA Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Janet A. Mattei, Director Gamze Menali, Technical Assistant ____________________________________________________________________________ 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! ____________________________________________________________________________