M1 Group was created ten years ago by members Diego Rodriguez , José
Ripero and Francisco Pujol. Since the very begining we were aware that
to find a SN was an extremely difficult task, but there was Robert Evans
example , amateurs astronomer with 35 discoveries . This fact encouraged
us to keep observing and try to find a new small point not included in
the M. Palomar images or in the Thompson Bryan charts.
The group gathered botch , equipment and bibliography to do SN hunting
( RealSky Thompson-Bryan charts , CCD Buil-Thouvenot , and Lopez Alvarez
Atlases, etc...) We also own a computer program able to provide asteroid
appulses to deep-sky objects , and therefore , to clarify possible false
alarms due to asteroids.
In the ten years ago we achieved 85.000 negative observations checking
1500 different galaxies . We have also been able to observe and monitor
visually , photographically and with CCD , SN 1989 in M66 , (This SN was
one of the reasons to create the group ), SN 1991T in NGC 4527 , SN 1991X
in NGC 4902 and SN 1993j in M 81.
SN 1993J was discovered on the 28th of March , Sunday night , By Francisco
Garcia Díaz , amateur astronomer living in Lugo , Spain with a 10"
telescope. Francisco is an active member of M1, see: Chronology
of the discovery of SN 1993J in M81
Finally, we have concentrated in monitoring that show activity violently
. All these objects have shown large variability.
30 of August 1998
© Agrupación Astronómica de Madrid