THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 INTERNET: aavso@aavso.org * * * AAVSO NEWS FLASH * * * Subject: SN 1998bu chart, SY Cnc, HL CMa, No. 298 AB Dra, AY Lyr, IP Peg, UZ Ser May 13, 1998 ____________________________________________________________________________ CHART FOR SN 1998bu in NGC 3368 An AAVSO 'e' scale preliminary chart of SN 1998bu in NGC 3368 has recently been posted on the AAVSO ftp site at the following two addresses: ftp.aavso.org (198.116.78.2), in /pub/alerts/alert249/ or ftp.aavso.org (198.116.78.2), in /pub/charts/leo/sn1998bu/ ----------------------------------------------------------------------------- SY CANCRI The dwarf nova type (Z Cam subclass) cataclysmic variable SY Cnc is in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 05.94 13.4 GRL MAY 09.886 12.5 PYG MAY 13.3528 11.5 SRX ----------------------------------------------------------------------------- HL CANIS MAJORIS The dwarf nova type (Z Cam subclass) cataclysmic variable HL CMa appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 04.3937 <13.7 SRX MAY 08.3903 <12.1 SRX MAY 13.3486 11.4 SRX ----------------------------------------------------------------------------- AB DRACONIS The dwarf nova type (Z Cam subclass) cataclysmic variable AB Dra appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 09.992 14.1 PYG MAY 12.0056 12.7 BMM ----------------------------------------------------------------------------- AY LYRAE The dwarf nova type (SU UMa subclass) cataclysmic variable AY Lyr appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 07.4382 <15.5 HSG MAY 09.997 <14.4 PYG MAY 10.0924 <14.2 BMM MAY 12.0264 14.0 BMM ----------------------------------------------------------------------------- IP PEGASI The eclipsing dwarf nova type cataclysmic variable IP Peg appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 07.4604 15.4: HSG MAY 08.0 <12.5 OB MAY 13.133 12.5 OB ----------------------------------------------------------------------------- UZ SERPENTIS The dwarf nova type (possible Z Cam subclass) cataclysmic variable UZ Ser appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAY 07.4507 <14.8 HSG MAY 09.6354 <13.6 SRX MAY 13.6063 13.2 SRX ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. Biesmans, Belgium GRL - B. Granslo, Norway HSG - G. Hanson, USA OB - D. Overbeek, South Africa PYG - G. Poyner, England SRX - R. Stubbings, Australia 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 ____________________________________________________________________________ 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 sending a message to: observations@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 We look forward to including your observations in future editions of AAVSO NEWS FLASH! ___________________________________________________________________________