TTCP NEWS  SCHEDULE	The TTCP in October 1998 at the Laboratory  of Astrophometry of the Vilnius University  (clickable image)
FIRST DATA
PHOTOS: TTCP_march99 TTCP_oct98 TTCP_oct98 TTCP_june98
MAIN SPECIFICATIONS
Optical layout
Quantum efficiency
Count rate stability
Dark current
PAPERS: TTCP.ps.gz (129 Kb)
TT1 TELESCOPE
OAC home page

* Number of channels: 3 (all parallel to the telescope main axis)

* Distance between ch.1 (target) and ch.3 (sky): 20 mm (5.3 arcmin for TT1 telescope)

* Distance between ch.1 and ch.2 (comparison star): 26 to 50 mm (7-13 arcmin)

* Field eyepiece diameter: 40 mm (10.2 arcmin)

* Rotational bearing

* Motorized filter and aperture wheels

* Centering eyepieces 8 mm diameter (2 arcmin)

* CCD remote centering for ch.1

* Diaphragms: 0.5, 1.0, 2.0, 3.0, 8.0 mm [7.9, 15.8, 31.6, 47.4, 126.3 arcsec]

* FILTERS
- UBV + Rc + no-filter option (ch.1, 2, 3)
- Stromgren, Vilnius, StromVil (only ch.1 and 2)

* Changing filter time: ~0.1 s

* PMTs
- 3 Hamamatsu R647P (for UBV photometry)
- 3 Hamamatsu R1463P (for Stromgren, Vilnius and StromVil photometry)

* Cooling system: one stage thermoelectric cooler with actively ventilated heat absorber (PMT temp. -5C to -15C)

* Timing system: GPS 1 Hz signal + high stability clock

* Minimum integration time: 1 ms

* PC interface compatible with WET (Whole Earth Telescope) standard software and with GPS facilities

* Dimensions: 410 mm (height) x 210 mm (max diameter CCD camera excluded)

* First tests of the single components (Vilnius Laboratory): March 99 (already done)

* Tests of the whole instrument (Vilnius laboratory): June-July 99 (already done)

* Definitive tests at the telescope (Loiano Observatory) and delivery to the OAC: 27-30 September 1999 (already done)

* TTCP is now available at the 1.5m Loiano telescope and will remain there until it will be definitively moved to the TT1 telescope (March-April 2000).