Telescopes at Millikin
Parallax Instruments 20" Ritchey-Chrétien
| Model No. | PI500R, 20" |
| Clear Aperture | 508mm |
| Focal Ratio | F/8.1 |
| Focal Length | 4114mm |
| Primary & Secondary Mirror Substrate |
Zero Expansion Astrositall |
| Telescope Tube | Low Expansion Carbon Fiber |
| Secondary Amplification | 2.70X |
| Spacing (Approx.) | 40" |
| Mirror Coatings | AlSiO |
| Optical Tube Dia. | 24" |
| Optical Tube Length | 56" |
| Optical Tube Weight | 130lbs. |
| Focuser | 2.7" |
| Finder Scope | 7X50 |
| Tube Rings | Standard |
| Primary Cooling Fan | Standard (Quantity 3) |
| Slewing Handle | Standard |
| Tube C'wt Bar Assy. | Standard (Quantity 2) |
Meade LX 200 8" Schmidt-Cassegrain
| f | 6.3 | 10 |
| Focal Length | 1280mm | 2000mm |
| Aperture | 203mm | 203mm |
| Secondary | 88mm | 76mm |
| Obstruction | 43% | 37% |
| Type | SCT | SCT |
| Drive | Fully computer controlled; 64359 object library; automatic GO TO capability |
| Altaz | Yes |
| Polar | Yes with optional wedge |
| Eyepiece | 26mm Plossl |
| Finder | 8x50 |
| RS232 | Yes |
| Power | 18v DC (AC adapter included) |
| Weight | 41lbs | 41lbs |
| Tripod | Standard |
Cameras at Millikin
ST-7XME
| CCD | Kodak KAF-0402ME + TI TC-237 |
| Pixel Array | 765 x 510 pixels, 6.9 x 4.6 mm |
| Total Pixels | 390,000 |
| Pixel Size | 9 x 9 microns |
| Full Well Capactiy (ABG) | ~50,000 e- |
| Full Well Capactiy (NABG) | ~100,000 e- |
| Dark Current | 1e-/pixel/sec at 0C |
| Antiblooming | KAF-0402ME is NABG only ABG optional (KAF-0402LE) |
| Shutter | Electromechanical |
| Exposure | 0.11 to 36000 seconds, 10ms resolution |
| Correlated Double Sampling | Yes |
| A/D Converter | 16 bits |
| A/D Gain | 2.6e-/ADU |
| Read Noise | 15e-RMS |
| Binning Modes | 1 x 1, 2 x 2, 3 x 3 |
| Pixel Digitization Rate |
Up to 420,000 pixels per second |
| Full Frame Acquisition |
~35 seconds |
| Field of View | 12 x 8 arcminutes on f/10 Meade LX 200 |
| Pixel Size | .9 x .9 arcseconds on f/10 Meade LX 200 |
| Limiting Magnitude | Magnitude 14 in 1 second |
| (for 3 arcsec FWHM stars) | Magnitude 18 in 1 minute |
| Cooling - standard | Single Stage Thermoelectric, Active Fan, Water Assist Ready -45 C from Ambient Typical |
| Temperature Regulation | +-0.1 C |
| Power | 5 VDC at 1.5 amps, +-12 VDC at 0.5 amp desktop power supply included |
| Computer Interface | Parallel |
| Computer Compatibility |
Windows 98/2000/Me/NT/XP |
| Guiding | Dual CCD Self-Guiding |
STL-1001E
| Imaging CCD | Kodak Enhanced KAF-1001E |
| Pixel Array | 1024 x 1024 pixels, 24.6 x 24.6 mm |
| Total Pixels | 1.0 million |
| Pixel Size | 24 x 24 microns |
| Full Well Capacity (NAGB) |
200,000 e- |
| Dark Curent | 9 e-/pixel/second at 0 degrees C |
| Antiblooming | NAGB only |
| Shutter | Electromechanical |
| Exposure | 0.12 to 3600 seconds, 10 ms resolution |
| Correlated Double Sampling |
Yes |
| A/D Converter | 16 bits |
| A/D Gain | 2.0e-/ADU |
| Read Noise | 14.8e-RMS |
| Binning Modes | 1 x 1, 2 x 2, 3 x 3 |
| Full Frame Download |
40.8 seconds |
| Cooling - standard | Two-Stage Thermoelectric, Water Assist, -40 C from Ambient Typical |
| Temperature Regulation | +-0.1 degrees C |
| Power | 10-18VDC, 12VDC nominal, Universal AC to 12VDC desktop supply |
| Computer Interface | Parallel |
| Computer Compatibility | Windows 98/NT/2000/Me/XP/Mac OS-X |
| Guiding | Dual CCD Self-Guiding Standard, |
SGS-Self Guided Spectrograph
| Dispersion: | |
| Two gratings available, on a carousel for rapid selction 150 lines per mm (4.3 Angstroms per pixel) 600 lines per mm (1.0 Angstroms per pixel) |
|
| Slit Width | 100 microns wide Entrance Slit |
| Accptance cone angle: |
F/6.3 by F/10 |
| Resolution: | |
| Narrow slit & 600 lines/mm |
2.4 Angstroms |
| Narrow slit & 150 lines/mm |
10 Angstroms |
| Wide slit & 600 lines/mm |
10 Angstroms |
| Wide slit & 150 lines/mm |
38 Angstroms |
| Relative Sensitivity to Diffuse Sources: | |
| Narrow slit & 600 lines/mm | 1.0 |
| Narrow slit & 150 lines/mm | 4.0 |
| Wide slit & 600 lines/mm | 4.0 |
| Wide slit & 150/mm | 16.0 |
| Dispersion: | 1.07 or 4.3 Angstroms per pixel |
| Resolution | Emission line is recorded with 2.4, 10 or 38 Angstroms Full Width at Half Maximum |
| Spectral coverage per frame |
About 750 Angstroms with the high resolution grating, or 32000 with the low resolution grating |
| Center Wavelength Selection |
Calibrated Micrometer Adjustment |
| Wavelenght Range |
3800 to 7500 Angstroms |
| Sensitivity | Signal to noise ration of 10:1 for a 9th mag star, 20 minute exposure using a non-AGB ST-7 and a 10 inch (25 cm) apertaur in high resolution mode. An ABG ST-7 will reach magnitude 8. The low resolution mode will be 1.5 magnitudes more sensitive. |
| Entrance Slit | 18 micron (2.3 arcseconds wide with 63 inch focal length telescope or 72 microns |
| Uses: | Stellar Classification Analysis of Nebular Lines Indentification of spectroscopic binaries Measurement of Stellar proper motion to +/- km/sec accuracy Measurement of Emission Nebula Proper Motions Spectra of Laboratory and field sources |