diff --git a/docs/source/index.md b/docs/source/index.md index 05ac7b79..f5184e2a 100644 --- a/docs/source/index.md +++ b/docs/source/index.md @@ -19,8 +19,10 @@ NGPS achieves these gains through: :hidden: :maxdepth: 2 -science/index -instrument/index -users-manual/index -cpp-api/library_root +Science +Technical Specifications +Users Manual +C++ API +Software Issue Reporting +Software Feature Request ``` diff --git a/docs/source/technical-specifications.md b/docs/source/technical-specifications.md new file mode 100644 index 00000000..320c1cf1 --- /dev/null +++ b/docs/source/technical-specifications.md @@ -0,0 +1,90 @@ +# Technical Specifications + +This page summarizes the NGPS technical specifications from the May 14, 2026 Version 2 specification sheet. + +## General Specifications + +| Category | Specification | +| --- | --- | +| Instrument type | 4-channel UV-NIR spectrograph | +| Wavelength coverage | 3050 to 10400 | +| Telescope focus | Cassegrain focus at P200, F/13.6, 2.54 arcsec/mm | +| Slit / IFU | 3-slit adjustable-width IFU | +| Slice length | 50 arcsec long | +| Slice width | 0.36 to 10 arcsec wide per slice | +| Spectral resolution | R > 4000 for the narrowest slit setting | +| Exposure timing | Common exposure time | +| Detector binning | Independently binned spatial and spectral directions | +| Readout mode | BOI mode | + +## Channel Performance + +| Channel | Bandpass | Max Efficiency, Slit | Spectral Resolution at 0.4 arcsec | Spatial Resolution | +| --- | ---: | ---: | ---: | --- | +| U | 3050 to 4430 | 65% | 4100 | Seeing limited | +| G | 4250 to 5960 | 60% | 4200 | Seeing limited | +| R | 5620 to 7950 | 74% | 4300 | Seeing limited | +| I | 7530 to 10400 | 74% | 4500 | Seeing limited | + +## Detector and Readout Properties + +| Channel | Plate Scale (arcsec/pixel) | Dispersion (A/pixel) | Read Noise (e rms) | Dark Current (e/pixel/hour) | +| --- | ---: | ---: | ---: | ---: | +| U | 0.193 | 0.340 | 2.8 | < 5.6 TBC | +| G | 0.189 | 0.435 | 7.8 | < 1.7 | +| R | 0.186 | 0.577 | 3.7 | < 1.2 | +| I | 0.186 | 0.713 | 4.6 | < 1.0 | + +## Detector Format and Cosmic-Ray Rate + +| Channel | Active Detector Region | Pixel Size | Cosmic-Ray Rate (% pixel/hour) | 2x1 Bin Readout Time (s) | +| --- | --- | --- | ---: | ---: | +| U | 1024 x 4102 | 15 um square pixels | 1.1 | 64 | +| G | 1020 x 4114 | 15 um square pixels | 2.8 | 31 | +| R | 1020 x 4114 | 15 um square pixels | 3.2 | 55 | +| I | 1020 x 4114 | 15 um square pixels | 2.1 | 55 | + +## Calibration System + +| Area | Specification | +| --- | --- | +| Calibration input | Telescope-mimicking f/14 telecentric input beam | +| Arc lamps | ThAr, FeAr | +| Continuum sources | Quartz halogen continuum, red; laser-pumped continuum, blue | +| Additional calibration sources | UV LEDs, etalon spectra | +| Calibration control | Concurrent calibration, individual lamp shutters, mechanical PWM control | +| Dome lamps | Palomar dome lamps: low, high, ultrahigh, He | + +## Acquisition and Guidance + +| Area | Specification | +| --- | --- | +| Acquisition and guidance system | Offset guider | +| Field of view | 4.44 x 4.15 | +| Pixel scale | 0.26 arcsec/pixel | +| Astrometry | Full-field solution | +| Filters | Photometric filters: g', r', i', clear | +| Camera mode | EMCCD mode | + +## Slice Viewing Cameras + +| Area | Specification | +| --- | --- | +| Configuration | Two fields of view adjacent to outer slices | +| Field of view | 21 x 50 arcsec each | +| Pixel scale | 0.060 arcsec/pixel | + +## Additional Features + +| Feature | +| --- | +| Exposure time calculator | +| Automated target acquisition | +| Guided afternoon calibration | +| Quick-look pipeline | +| Flexure compensation | +| Focus compensation | +| Observation Timeline Modeler (OTM) | +| Automatic binning adjustment | +| Frame transfer capability | +