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: YZ Cnc, V795 Cyg, U Gem, IR Gem, No. 272 AG Hya, RX LMi, CW Mon, BI Ori, March 16, 1998 CN Ori, CZ Ori, V1159 Ori, SU UMa ________________________________________________________________________________ YZ CANCRI The dwarf nova type (SU UMa subclass) cataclysmic variable YZ Cnc is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 11.2764 15.0 RR MAR 15.0979 11.7 SWT MAR 11.4542 <12.1 SRX MAR 15.1604 12.2 SWT MAR 11.847 <13.8 PYG MAR 16.0875 12.5 SWT MAR 12.1760 15.85 CCDV ZRE MAR 16.1215 12.9 DPL MAR 13.1750 15.91 CCDV ZRE MAR 16.1870 12.76 CCDV ZRE MAR 15.0486 13.0 BRJ MAR 16.4403 12.2 SRX ----------------------------------------------------------------------------- V795 CYGNI The dwarf nova type (SS Cyg subclass) cataclysmic variable V795 Cyg appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 10.5236 <14.5 HSG MAR 13.19 13.3 SPK MAR 12.166 <15.0 PYG ----------------------------------------------------------------------------- U GEMINORUM The dwarf nova type (SS Cyg subclass) eclipsing cataclysmic variable U Gem is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 11.2778 14.1 CCDV RR MAR 15.1076 9.7 MKJ MAR 11.860 14.5: PYG MAR 15.9 9.1 KIL MAR 12.1710 14.7 CCDV ZRE MAR 16.0813 9.6 KMA MAR 12.2681 <13.8 RR MAR 16.0861 9.6 SWT MAR 12.85 13.0 SPK MAR 16.1208 9.4 DPL MAR 13.1690 14.4 CCDV ZRE MAR 16.1760 10.11 CCDV ZRE MAR 15.0472 9.4 BRJ MAR 16.4438 9.6 SRX MAR 15.0958 9.9 SWT MAR 16.5708 9.2 DKS ----------------------------------------------------------------------------- IR GEMINORUM The dwarf nova type (SU UMa subclass) cataclysmic variable IR Gem appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 09.972 <14.2 PYG MAR 15.0924 12.5 SWT MAR 11.858 <14.5 PYG MAR 15.1257 12.5 MKJ MAR 12.1620 16.56 CCDV ZRE MAR 16.0806 13.1 SWT MAR 13.1470 15.79 CCDV ZRE MAR 16.1200 13.67 CCDV ZRE MAR 15.0458 13.6 BRJ MAR 16.4389 13.8: SRX ----------------------------------------------------------------------------- AG HYDRAE The dwarf nova type cataclysmic variable AG Hya appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 09.7375 <15.0 SRX MAR 16.4944 14.3 SRX ----------------------------------------------------------------------------- RZ LEONIS MINORIS The dwarf nova type cataclysmic variable RZ LMi appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 04.4368 15.4: HSG MAR 11.871 <14.1 PYG MAR 08.4597 <14.1 HSG MAR 15.0535 14.1 BRJ MAR 09.999 <14.1 PYG ----------------------------------------------------------------------------- CW MONOCEROTIS The dwarf nova type (SS Cyg subclass) cataclysmic variable CW Mon appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 28.0965 <13.9 MKJ MAR 16.4597 12.8 SRX MAR 11.4472 <13.0 SRX ----------------------------------------------------------------------------- BI ORIONIS The dwarf nova type (Z Cam subclass) cataclysmic variable BI Ori appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 28.2493 <14.6 HSG MAR 16.4556 14.6 SRX MAR 01.1368 <15.1 HSG MAR 16.4896 14.6 SRX MAR 03.1292 14.6 HSG ----------------------------------------------------------------------------- CN ORIONIS The dwarf nova type (Z Cam subclass) cataclysmic variable CN Ori is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 08.838 <14.1 PYG MAR 15.0389 12.7 BRJ MAR 11.4465 <13.0 SRX MAR 16.0215 12.4 SWT MAR 11.814 <14.3 PYG MAR 16.4361 12.6 SRX ----------------------------------------------------------------------------- CZ ORIONIS The dwarf nova type (SS Cyg subclass) cataclysmic variable CZ Ori appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 11.4507 <13.3 SRX MAR 15.0743 <13.9 MKJ MAR 11.854 <14.2 PYG MAR 16.0500 12.3 SWT MAR 13.1620 15.85 CCDV ZRE MAR 16.1140 12.73 CCDV ZRE MAR 15.0417 12.7 BRJ MAR 16.4563 12.4 SRX ----------------------------------------------------------------------------- V1159 ORIONIS The dwarf nova type (SU UMa subclass) cataclysmic variable V1159 Ori appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 11.4458 <13.7 SRX MAR 16.0229 13.7 SWT MAR 11.813 <14.5 PYG MAR 16.1220 14.01 CCDV ZRE MAR 13.0229 13.2 SWT MAR 16.4375 13.7 SRX MAR 15.0382 13.8 BRJ ----------------------------------------------------------------------------- SU URSAE MAJORIS The dwarf nova type (SU UMa subclass) cataclysmic variable SU UMa is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 10.5125 14.2 HSG MAR 15.0549 12.1 BRJ MAR 11.988 14.5: PYG MAR 16.0938 11.9 SWT ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. Bortle, USA PYG - G. Poyner, England DKS - S. Dvorak, USA RR - R. Royer, USA DPL - P. Dombrowski, USA SPK - P. Schmeer, Germany HSG - G. Hanson, USA SRX - R. Stubbings, Australia KIL - L. Kiss, Hungary SWT - R. Stewart, USA KMA - M. Komorous, Canada ZRE - R. Zissell, USA MKJ - J. McKenna, USA 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! _______________________________________________________________________________