Spectroscopy

Instrument/Contact	New documentation	Wavelength range (Å)	Dispersion (Å/mm)	Slit length	Detector	Comments
2.1m telescopio
Boller&Chivens Responsible: This email address is being protected from spambots. You need JavaScript enabled to view it.	User manual (2025)	3600 – 9900	43 – 326 depends on the grid.	5'	SI-2	"Classic" low and intermediate resolution. This spectrograph is owned by di Brera Astronomical Observatory. The range considers where the efficiency is greater than 0.1%.
Echelle Responsible: This email address is being protected from spambots. You need JavaScript enabled to view it.	Slit automation Flexion report Arc lamp spectral line identificacion	3000 – 11000	4 – 16 depends on the order. R=18000@5000A	6'.7	Marconi4	High resolution spectrograph. The slit length can be ajusted with masks.
Mezcal Responsible: This email address is being protected from spambots. You need JavaScript enabled to view it.	Control system upgrade	3900 – 9000	~2.2 @ Hαlpha	6'.5	SI-2	Nebular high resolution spectrograph.
FICUS Responsible: This email address is being protected from spambots. You need JavaScript enabled to view it.		NA	NA	NA	NA
CANHIS Responsible: This email address is being protected from spambots. You need JavaScript enabled to view it.		50 Å @ 4500 Å 140 Å @ 7800 Å	40,000-160,000		SI-2

Boller & Chivens spectrograph

The Boller & Chivens spectrograph is a classic-design instrument that offers low and intermediate resolutions, making it ideal for spectroscopic studies. Originally designed for the f/7 Cassegrain focus of a 1.37m telescope at the Osservatorio Astronomico di Brera, this spectrograph has been adapted and optimized for exclusive use on the 2.1m Telescope at OAN-SPM. Its combination with a next-generation CCD allows for high-quality data acquisition for detailed astrophysical studies.

Documents (Spanish version):

Contact:

Dra. Ilse Plauchu-Frayn

This email address is being protected from spambots. You need JavaScript enabled to view it.

0.84m Telescope

The primary mirror was designed and polished by the Institute of Astronomy - UNAM academic staff and has a secondary mirror f/15. It has been at OAN-SPM since 1972.

Most of its mechanical mount has been replaced.

Technical information

♦ Ritchey-Chretien design.

♦ Secondary: f/15 (~ 16.43 "/mm).

♦ AH limits: ± 5^h29^m (special sorftware for AH: ± 6^h).

♦ DEC limits: mechanical safe at +75º 00' 00'' (yoke obstructs at >+70º) y -39º 00' 00'' (with software for <-39º).

♦ 0.84m telescope user manual (Spanish version: August 2015)

♦ Provisional guide for the aperture of the 0.84m telescope (april 2009).

♦ Longitude = 115º 27' 58" West.

♦ Latitude = 31º 02' 42" North.

♦ Altitude = 2790m.

Available instruments for this telescope

Remote observations

Tel. 84cm remote operations manual (Spanish only)

Remommendations for remote use of the Tel. 84cm (Spanish only)

Tel. 84cm remote use (Spanish only)

User-Troubleshooting - Remote84 (Spanish only)

Additional information

CCDs.

Exposure time calculator: optical imaging, infrared imaging and spectroscopy.

A Quick guide to CCD imaging at the OAN-SPM.

Instrumentation department at Institute of Astronomy - Ensenada.

2.1m Telescope

The 2.1m telescope is the largest in the OAN-SPM. It was built between 1974 and 1979, and inaugurated on September 17, 1979.

Technical information

♦ Ritchey-Chretien design.

♦ Secondary: f/7.5 (~ 13.0 "/mm), f/13.5 (~ 7.15 "/mm), and f/30 (~ 3.25 "/mm).

♦ AH limit: ± 5^h30^m.

♦ DEC limit: +69º 40' 00'' and -40º 00' 00''.

♦ Manual rotating plate.

♦ Longitude = 115º 27' 49" West.

♦ Latitude = 31º 02' 39" North.

♦ Altitude = 2800m.

♦ Dome: The segment of the dome has two sections that can be put up or down (2 or 1) depending on the region of the sky observed. The next diagram shows the visible areas with the three configurations of the sections.

Available instruments for this telescope

Optical spectroscopy

♦ Boller & Chivens spectrograph.

♦ Echelle clásico REOSC spectrograph.

♦ Mezcal MES-SPM spectrograph.

♦ Scanning Fabry -Perot interferometer.

Infrared

♦ CAMILA: Near infrared camera (1 to 2.5 microns NICMOS detector) imaging mode.

♦ CID: Both imaging and spectroscopy. Near and mid-infrared (1 to 20 microns, InSb, BIB).

Optical imaging

♦ Italiana filter wheel.

Additional information

CCDs.

2m Telescope guider.

Exposure time calculator: optical imaging, infrared imaging and spectroscopy.

A Quick guide to CCD imaging at the OAN-SPM.

Instrumentation department at Institute of Astronomy - Ensenada.

1.5m Telescope

The 1.5m telescope was installed in the Sierra San Pedro Mártir in 1970, through a partnership with the University of Arizona; under the enthusiastic auspice of the astronomer Harold Johnson.

The primary mirror, originally aluminum, was replaced by a Cervit mirror. Most of its mechanical mount has been replaced.