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Celebrating 75 Years of Discovery
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Palomar High Angular Resolution Observer (PHARO) Technical Specifications
View the original specs page.
Status: Observatory Instrument
- Detector chip
- Wavelength range, limiting spatial resolution
- Imaging scale
- Filters
- Resolving power
- Slits
- Coronographic Observations
Contents
1. Detector Chip
- Rockwell, 1024 × 1024 HAWAII HgCdTe
- 1 to 2.5 µm
- Read noise < 10 e−
2. Wavelength Range, Limiting Spatial Resolution
| Band | P200 diffraction limit |
|---|---|
| J-band (1.25 µm) | 0.052″ |
| H-band (1.65 µm) | 0.068″ |
| K-band (2.22 µm) | 0.092″ |
3. Imaging Scale
- 0.040″/pixel
- 0.025″/pixel
4. Filters
- J, H, H cont, K, K cont, Ks.
- assorted narrow-band (~1%); Brγ, CH4 short, CH4 long, Fe II, ND 1%, ND 0.1%.
5. Resolving Power (grism mode, 0.040″/pixel)
1500 (spanning any one of J or H or K bands) with narrow slit.
6. Slits
- 0.13″
- 0.26″
- 0.52″
7. Coronographic Observations
- Focal-plane (circular occulting) masks; 0.41″, 0.91″.
- Pupil-plane stops.
For more detailed instrument specs go to Pharo Page.
Questions? We've answered many common observing and operations questions in our observer FAQ page.
Please share your feedback on this page or any other Palomar topic at the
COO Feedback portal.
PHARO Specs / v 2.0.1
Last updated: 31 March 2019 ACM
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