THE ASTRONOMER Electronic Circular No 455 1990 Oct 25 19.55UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074 Telex: 94082518 Answerback: TAGUY Microlink: MAG60138 JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK GUYH@UK.AC.SUSSEX.CLUSTER TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074 -------------------------------------------------------------------- ROSAT MISSION UK Professional Astronomers have asked us to cover various stars over the coming months and to advise them of an outburst or unusual activity. This is to assist with the monitoring of stars on the rise using ROSAT, IUE and optical observatories simultaneously. If you wish to participate please start immediately but also e-mail the Editor to confirm. The high priority list requiring checks EVERY night until further notice follows: Star RA (1950) DEC Range Type TA Chart BAA OY Car 10h05m17s -69 59.4 12.2-17B UGSU+E HT Cas 01h07m00s +59 48.1 12.6-19.3 UG 850120 V436 Cen 11h11m35s -37 24.4 11.5-15.2B UGSU Z Cha 08h08m38s -76 23.5 11.5-16.2V UGSU+EA YZ Cnc 08h07m52s +28 17.6 10.2-14.6p UGSU 901025 IR Gem 06h44m31s +28 08 10.7-[14.5V UGSU 880908 VW Hyi 04h09m30s -71 25.4 8.4-14.4v UGSU WX Hyi 02h08m28s -63 33.1 9.6-14.85v UGSU T Leo 11h35m53s +03 38.9 10-15.71B UG 880619 UV Per 02h06m45s +56 57.3 11.0-17.5V UGSS 881228 016.03 TY Psc 01h22m48s +32 07.5 12.2-16.3p UGSU 901025 EK Tra 15h09m40s -64 55.1 10.4-[15.0v UGSU SU UMa 08h08m05s +62 45.4 10.8-14.9V UGSU 018.02 All northern objects have now been charted and copies can be sent on e-mail request. If any star in the above list starts to rise from minimum please telephone Martin Mobberley immediately: Monday - Thursday Nights (0245) 252975 Friday - Sunday Nights (0284) 828431 Please quote date, time, estimate, reduced magnitude, sequence used. If Martin is unavailable please contact the Editor, Guy M Hurst