3.1. The 0.2-m telescope (1998-2000)
The first telescope installed in Bootes-1 in 1998 was based at the Burst Alert Robotic Telescope (BART), and used commercially available hardware components. On the basis of positional information of GRBs obtained by means of the Internet network, BOOTES was able to perform rapid follow-up observations of events detected by BeppoSAX and RossiXTE satellites.
The telescope were designed to react inmediately (within 1 minute) in order to take unfiltered frames at the position of GRBs detected by the above mentioned satellites.
3.2. The two 0.3-m SC telescopes (2001)
Similarly to the 0.2m telescopes, the 0.3m telescopes were also designed to react inmediately (within 1 minute) in order to take frames (unfiltered, but also in VRI-filters) at the position of GRBs detected by BeppoSAX, RossiXTE, HETE-2, INTEGRAL and SWIFT. Achieved limiting magnitudes were 18.
3.3. The fast slewing 0.6-m RC telescopes (2009)
Similarly to the 0.3m telescopes, the 0.6m telescopes were also designed to react inmediately (within 10 seconds) in order to take frames (unfiltered, g'r'i'Z Y-filters) at the position of GRBs detected by INTEGRAL, SWIFT and FERMI. EEMCCD devices secure the state-of-the-art imaging allowing to reach 20.5 limiting magnitude.