Telescope Data

Primary mirror diameter 1.20 m
Secondary mirror diameter 0.50 m
Effective unobstructed diameter 1.09 m
Focal length 8.40 m
f-ratio f/7
Mount type Altitude-Azimuth ("Alt-Az")
Platescale 24.56 arcsecs/mm
Speed of axes 10°/sec maximum
Telescope manufacturer Halfmann Machinenbau
M1+M2 mirror manufacturers

Lomo PLC/St. Petersburg

 

M3 mirror manufacturer

Berliner Glas KGaA/Berlin

 


 

Observatory Data

  MONET/North MONET/South MONET/Central
Site McDonald Observatory, Texas, USA Sutherland, Northern Cape, ZA Göttingen, Niedersachsen, DE
Latitude +30° 40' 17" = 30.6714° North -32° 22' 44"  =  32.3789° South +51° 33' 38" = 51.5606° North
Longitude -104° 1' 18" E  =  104.0217° West +20° 48' 39" E  =  20.8108° East +9° 56' 40" E  =  9.9444° East
Height 2000 m 1700 m 201 m
Time zone

Central Standard Time (CST)

UTC-7 (winter), UTC-6 (summer)

SA Standard Time (SAST)

UTC+2 (no summer time)

Middle European Time (MEZ)

UTC+1 (winter), UTC+2 (summer)

First light

December 2005

2008

2014

 



 Camera Data

Camera

Finger Lakes Instruments

ProLine PL230

(current South)

Santa Barbara Instruments

STF-8300 M

(current North)

Finger Lakes Instruments 

Microline 1108

(MORISOT)

Scientific Instruments

1100

(old)

Apogee

ALTA E47+ (old)

Chip

E2V 230-42 BI BBAR

back-illuminated

Q.E. 95% at 570 nm

KAF-8300

front-illuminated

Q.E. 57% at 550 nm

Hamamatsu  S10140-1108N 

back-illuminated

Q.E. 90% at 570 nm

 

 

E2V 230-42 BI BBAR

back-illuminated

Q.E. 95% at 570 nm

 E2V CCD47-10

back-illuminated

Q.E. 92% at 570 nm

Size 2048x2048 3326x2504 2048x250  2048x2048 1024x1024
Pixels 15 μm 5.4  μm 12 μm   15 μm 13 μm
Gain  1.83 e-/ADU  2.7 e-/ADU 1.97 e-/ADU   2.28 e-/ADU 1.3 e-/ADU
Readout-Noise 12.1 e- = 6.6 ADU  24.3 e- = 9.0 ADU 10.6 e- = 5.38 ADU   7.1 e- = 3.1 ADU  9.0 e- = 11.7 ADU
Bias level 997 ADU  1025 ADU 978 ADU   525 ADU  
Dark current 0.302 e-/pixel/s  0.02 e-/pixels/s ?   < 0.002 e-/pixel/s  0.2 e-/pixel/s
Scale (unbinned) 0.3684 arcssec/pixel 0.1326 arcsec/pixel (given by fibre diameters in IFU bundle)   0.3684 arcssec/pixel 0.3193 arcsec/pixel
Field 12.6 x 12.6 arcminutes 7.4 x 5.5 arcminutes (given by fibre positions in IFU bundle)   12.6 x 12.6 arcminutes 5.4 x 5.4 arcminutes
Saturation about 65000 ADU 64311 ADU 50200 ADU   about 45000 ADU  
Non-linear for...   > 57000 ADU      
Notes South starting spring 2017 Use 2x2 or 3x3 binned (spectroscopy)   No longer in use No longer in use

 


 

Filter Data

Name   Description Central Wavelength [nm] FWHM [nm] Peak Wavelength [nm] T_max [%]
clear  BG glass  (as CCD)  (as CCD)  (as CCD)  (as CCD)
Bessel U  ultraviolet  360  51  364  62
Bessel B  blue  440  94  431  66
Bessel V  green  550  109  520  93
Bessel R  red  660  142  600  83
Bessel I  far-red  800  156  805  94
Sloan g'  green  475  150  492  96
Sloan r'  red  619   132  629  96
Sloan z'  near IR  900    900  96
Halpha  neutral hydrogen  656  8.2  656  92
OIII twice ionised oxygen 498 11.7 498 87
Hcontinuum & once ionized sulfur        

 


 

Piggyback Telescopes

 

MONET/South is equipped with an auxiliary telescope called a "piggyback" because it is mounted on the main telescope's other Nasmyth port and looks in parallel with the science camera.  The piggyback is equipped with it's own derotator (Gemini from Optec Inc./USA), filterwheel (FW-8300 from Diffraction Ltd./SBIG), and CCD camera (STX-8300M from Diffraction Ltd./SBIG).  Originally intended as a means of autoguiding, the piggyback is not being prepared to provide photometry of objects being observed by the MORISOT spectrograph.

 

Telescope and Camera Data

Primary mirror diameter 0.25 m
Secondary mirror diameter 0.05 m
Effective unobstructed diameter 0.24 m
Focal length 2.00 m
f-ratio f/8
Mount type Altitude-Azimuth ("Alt-Az"), slaved to main telescope
Platescale 103.13 arcsecs/mm
Telescope manufacturer GSO/China
Platescale on STX-8300M camera 0.928 arcsecs/pixel
Field-of-View on STX-8300M camera 51.1 x 38.7 sqr-arcmins
Filters available clear,r,g,b