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The ROTSE (Robotic Optical Transient Search Experiment) telescope is dedicated to a program of rapid follow-up observations of gamma-ray bursts. ROTSE was developed as a next-generation robotic instrument by the Michigan State University and other collaborative universities. There are four ROTSE telescopes in the world. Two are located in the northern hemisphere (United States and Türkiye) and other two telescopes are located in the southern hemisphere (Australia, Namibia). Detailed information can be found at

The latest ROTSE telescope which is called ROTSEIII-d  was located at the TUG Bakirlitepe site according to a contract signed between TUBITAK and Michigan State University in 2002. Although ROTSE project is over, currently only ROTSE III-d telescope continues to follow GRB alerts and carries out observational projects proposed by Turkish astronomers.

Only one CCD camera is used at the ROTSEIII-d telescope without any filter option.


ROTSEIII-d Telescope

Optical design: Cassegrain (modified)
Main mirror diameter: 450 mm
Focal length: 850 mm (with field lenses)
Focal ratio: f/1.8 (main mirror)
Resolving power: 0.31 arcsec
Image scale: 241”/mm
Filter: -
Dome: Clamshell type



Model: Astronomical Research Cameras, ARC E2V CCD42-40
Sensor: Marconi CCD42-40 (E2V), BT
Format: 2048x2048 pixels
Pixel size: 13.5 micron
Sensor size: 27.6 x 27.6 mm
Readout noise: 10 e- (1 MHz)
Dark current: 0.06 e-/pixel/sn
Dynamic range: 16-bit
Binning: 1x1, 2x2, 3x3
Exposures: 5, 20, 60 sec. (Default values, changeable)
Cooling: Liquid, Thermocube 300 chiller
Interface: ARC 22, f/o Timing Board
Readout time: 6 sec (full frame)
Pixel scale: .26 arcsec/pixel
Field of view: 1.85 x 1.85 degree




[Australia], [United States], [Namibia], [Turkey],

A                  B            C          D




ROTSE Operations

Data archive

Gama Ray Burst

Variable Sources

ROTSE Telescope

Publications (from Turkey)

Publications (ADS)