The network will be soon operated as a fully remote controlled
network - without any human assistance.
The access to the plate data is facilitated by the new high
quality flatbed Heidelberg CCD film scanner with optical resolution of 3 000 dpi
connected to a powerful computer/graphic station.
The all-sky camera based on analogous optical system (Zodiak 3.5/30 mm)
as the Czech EN network but with a 7k x 4k CCD camera OES MM7k4k (Philips chip
7168x4096 pixels 12 microns earch, 16 bit, binning 4x4, readout time 60 sec)
instead of film detector is operaded at the Sonneberg Obser-vatory.
The camera achievs a 9 mag sensitivity limit for 1 min exposure.
The all-sky sky monitors operated at the Ondrejov and Sonneberg
Observatories are able to provide valuable optical real-time and pre-burst data for GRBs.
The recent analyses provide valuable limits for simultaneous
optical emission of GRBs, for a 1 min emissions, there limits are between mag 3 and 6.
Better limits are expected to be achieved for triggers occurring
at clear nights high above the local horizon.
The All Sky CCD Camera at the Sonneberg Observatory achieves
limits of order of mag 9 for 1 min duration, hence capable to detect OTs analogous
to the prompt optical emission of GRB990123.
The importance of monitors will increase in the Swift
satellite era when numerous precisely localised GRBs are expected.
The Czech GRB analyses on all-sky images are supported by the
grant provided by the Grant Agency of the Academy of Sciences of the Czech
republic No. 3003206.