Javier Gorosabel Telescope



BOOTES-5 is the fifth robotic observatory of the international network of robotic telescopes BOOTES (Burst Observer and Optical Transient Exploring System). It was dedicated on November 26, 2015. Its main scientific objective is the observation and monitoring of the optic counterparts of gamma ray bursts as quickly as possible once they have been detected from space or other ground based observatories. BOOTES-5 was named Javier Gorosabel Telescope (JGT) after Spanish astronomer Javier Gorosabel Urkia. The BOOTES-5 project is a collaboration between the Institute of Astronomy of the National Autonomous University of Mexico (UNAM), the Institute of Astrophysics of Andalusia (IAA), Spain, and the Sungkyunkwan University (SKKU) in South Korea.


BOOTES-5 uses a dedicated 0.60 m f/8 Ritchey-Chretien telescope located at San Pedro Martir National Astronomical Observatory, Baja California, Mexico (Latitude 31° 02' 39" N, Longitude 115° 27' 49" W, Elevation 2860 m). The telescope has an ASTELCO NTM-500 mount with a maximum slewing speed of 20 degrees per second. The optical tube is made of carbon fiber to minimize the moment of inertia to reach it maximum slewing speed and to reduce the focus changes for thermal expansion. It operates in an open air dome.

Imaging Camera Parameters

Filters Transmission Curves and CCD Quantum Efficiency

Photometric CCD: Andor iXon X3 EMCCD 888 (1024x1024 pixels)
CCD read noise: < 5 e-1 pixel-1
Image frame size: 1024 × 1024 pixels (10 × 10 arc-min)
Detector image scale : 3.63 mm arcmin-1
Pixel size and scale : 24 um; 0.59 arc-sec pixel-1
Frame rate max 26 fps full frame; 93 fps at 512 × 512 pixels
Filters: (SDSS) u', g', r', i', (UKIDSS) Z, Y
Filter u' g' r' i' Z Y
λeff [Å] 3551 4686 6165 7841 8817 10305
Filter Transmission (color solid curves) and CCD Quantum Efficiency (black dotted curve).

Transformations between SDSS (ugriz) and Kron-Cousisns (UBVRI) photometry

Exposure Time Estimator

Exposure Time
Signal to Noise ratio (S/N) vs exposure time for stars with various V magnitudes using BOOTES-5 at new Moon.

Peripherial Support

Clear Sky Chart for San Pedro Martir
BOOTES-5 Exterior Camera
BOOTES-5 Interior Camera


Maintained by David Hiriart ( and Ilse Plauchu-Frayn. Last modified: 06.05.2022.