RTT150 Telescope

As Türkiye's largest investment in fundamental science, forming the space sciences ecosystem,
we are an advanced research infrastructure founded in partnership between Atatürk University and TÜBİTAK.

High-resolution astrometric, photometric and spectroscopic observations are carried out with the RTT150 and its advanced focal plane instruments.

General Specifications

Mount Type	Tube Length	Weight	Mirror Diameter	Mirror Central Hole Diameter	Mirror Focal Ratio	Mirror Weight	Mirror Thickness	Mirror Carrier Weight	Mirror Coating	Optical Design	Focal Length	f Ratio	Field of View	Dome Diameter	Dome Slit	Dome Type	Observation λ**
Equ.	4970 mm	37 tons	1500 mm	580 mm	f/1.3	970 kg	24 cm	2460 kg	Al + SiO2	Ritchey Chrétien	11.6 m	7.7	13.3' x 13.3'	10.5 m (Outer)	3.35 m	Observa-DOME	VIS

**λ: Observation wavelengths VIS: Visible Region

Focal Plane Instruments

Configuration	Focal Ratio	Focal Distance (mm)	Focal Scale ("/mm)	Angular Field of View (')	Linear Field of View (mm)
Cassegrain	f/7.7	11611	17.8	26.7	90
Coude	f/48	72257	2.9	3.83	80
Photoelectric Guide Telescope	f/10	3590	57	76	80
Visual Guide Telescope	f/10	3590	57	76	80
Finder (2 units)	f/4.2	504	409	240	-

Name	Instrument
Cassegrain	TFOSC - TUG Faint Object Spectrograph and Camera
	TFOSC-Wollaston Prism (Polarimeter)
	TFOSC – MOS
	Andor iXon+ EMCCD Camera
	ANDOR DW436
Coude	COUDE + SAO RAS CCD (English)
	COUDE + I2 Cell
	COUDE + ANDOR CCD
	DEFPOS - Dual Etalon Fabry Perot Optical Spectrometer

Brand	Filter Name	λcent (nm)	FWHM (nm)
Andover	H-alpha	656.3	5.0
Andover	H-alpha	656.3	2.0
Andover	OIII	436.3	5.0
Andover	Near H-alpha	618.5	5.0
Asahi	H-beta	485.8	10.4
Asahi	HeII	468.4	10.4
Asahi	CaII K	392.7	10.2
Asahi	OII	373.1	10.2
Asahi	OIII	435.3	9.4
Asahi	Bessel U	369	52
Asahi	Bessel B	433	114
Asahi	Bessel V	519	100
Asahi	Bessel R	600	128
Asahi	Bessel I	782	347
Asahi	SDSS u'	353	50
Asahi	SDSS g'	486	175
Asahi	SDSS r'	626	150
Asahi	SDSS i'	767	165
Asahi	SDSS z'	835	>350
Asahi	ND 0.5
Asahi	ND 1.0
Asahi	ND 2.0

Type	Central Wavelength (nm)	FWHM (nm)	Transmission (%)	Size (mm)	Thickness (mm)
Wing 1	712	6	95	Ø=49	5.6
Wing 2	754	5	98	Ø=49	5.7
Wing 3	781	4	98	Ø=49	5.8
Wing 4	812	5	98	Ø=49	5.9
Wing 5	1035	10	95	Ø=49	5.1
Wing 6	1056	10	95	Ø=49	5.1
Hα	656.92	5.0	68	50 x 50	5
Hα	656.39	2.0	65	50 x 50	5
Hα cont.	644.6	13.0	92	50 x 50	5
S II	674.98	6.4	70	50 x 50	6.4
S II	672.8	7.0	85	50 x 50	6.4
S II cont.	696.4	30.0	85	50 x 50	6.4
Near Hα	619.44	5.0	70	50 x 50	5
Hβ	485.8	10.4	85	50 x 50	5
He II	468.4	10.4	85	50 x 50	5
O III	436.96	9.4	93	50 x 50	5
O III	500.7	5.6	42	50 x 50	5
Ca II K	392.7	10.2	90	50 x 50	5
O II	373.1	10.2	80	50 x 50	5
Bessell U	369	52	60	Ø=60	5
Bessell B	433	114	68	Ø=60	5
Bessell V	519	100	85	Ø=60	5
Bessell R	600	128	80	Ø=60	5
Bessell I	782	347	97	Ø=60	5
SDSS u'	353	50	65	Ø=60	5
SDSS g'	486	175	90	Ø=60	5
SDSS r'	626	150	93	Ø=60	5
SDSS i'	767	165	97	Ø=60	5
SDSS z'	835	>350	95	Ø=60	5

Type	Optical Density	Transmission (%)	Size (mm)	Thickness (mm)
03FNA010	0.5±0.04	31.62	50 x 50	2
03FNA020	1.0 ± 0.08	10.0	50 x 50	2
03FNA024	2.0 ± 0.16	1.0	50 x 50	2

#	Atlas Names
1	FeAr Atlas for the newly produced MOS
2	COUDE Th-Ar Line Atlas (SAO CCD)
3	COUDE Th-Ar Line Atlas (85 Order, ANDOR CCD)
4	COUDE Th-Ar Line Atlas (80 Order, ANDOR CCD)
5	TFOSC "Long Slit, Grism 15" Fe-Ar Line Distribution Atlas
6	TFOSC New Andor CCD Line Calibration Atlases
7	TFOSC Old CCD Line Calibration Atlases (Fairchild 447, used until 8 August 2017)

RTT150 Telescope

General Specifications

Focal Plane Instruments

Focal Plane Instruments

Transmission Data

TFOSC Filters

Neutral Density Filters

Line Atlases