The All Sky Automated Survey History
The All Sky Automated Survey is a project which final goal is photometric
monitoring of approx. 10^7 stars brighter than 14 magnitude all
over the sky.
The initial idea for the project is due to
Prof. Bohdan Paczynski of
Princeton University. The prototype instrument, located at the
Las Campanas Observatory
(operated by the Carnegie Institution of Washington),
and the data pipeline were developed by
Dr. Grzegorz Pojmanski
(mail) of the
Warsaw University Observatory. The project is supported by a grant from
KBN (Polish funding agency) to G. Pojmanski, and a generous gift from Mr.
William Golden to B. Paczynski. It is a pleasure to acknowledge the on
site assistance by the
The first step bringing us closer to the desired goal is the
ASAS instrument, equipped with 768x512 Kodak
135/1.8 telephoto lens,
mounted on the
robotic mount, which was
developed at the
Warsaw University Astronomical Observatory
and since April 7, 1997
operates at the Las Campanas Observatory, Chile.
Prototype takes about 15 3-minute exposures (covering 90 sq. deg.)
per hour with limiting I-magnitude 13 and resolution of 14 arcsec/pixel.
Initial setup consisted of 24 fields covering 150 sq. deg. (later
increased to 50 fields - 300 sq. deg) monitored few times each
Dec 1, 1996 - The Prototype is now ready and fully operational.
Currently it is operated from the roof of the
Warsaw University Astronomical Observatory , whenever poor Central Europe
weather allows for it.
January 10, 1997 - The Prototype is out of operation due to the
flying washers inside the MEADE camera
head. Camera was send to US for fixing/replacement.
How long it'll take - God knows.
Short MEADE Service Policy story describes
Apr 27, 1997 --> Now - Automatic operation on Las Campanas
During October and November, 1996 we have managed to get 5 clear
observing hours and about 20 cloudy or foggy, which allowed us to do basic
tests of the system.
The mount seems to satisfy the design goals, and
camera seems to be working properly.
The only two major failures of the MEADE camera are two
"flying washers", which from time to time
drop onto the CCD surface.
Nevertheless, below you can find some Prototype outcome:
Grzegorz Pojmanski /