ETC Request ID: STIS.sp.904142
Exposure time (seconds) = 8,000.0000 at wavelength 1550.00 Å
gives: SNR = 3.9469 (per resolution element)
Table of Source and Noise Counts per Pixel
| Detailed Information | Count rate | Total counts | Associated noise |
| (counts/s) | (counts) | (counts) | |
| Counts (box 7 pixels high) | (1 pix x pix) | (2.0 pix resel x pix) | |
| Source | 0.002 | 25.74 | 5.07 |
| Background | 0.001 | 16.80 | 4.10 |
| Sky | 4.943e-11 | 7.91e-07 | 8.89e-04 |
| Dark Current | 0.001 | 16.80 | 4.10 |
| Total in selected region | 0.003 | 42.54 | 6.52 |
| Brightest Pixel (single exposure) (at 1217.70 Å) | 0.011 | 88.56 | |
| Count rate entire detector | 271.846 | ||
| Buffer Time (sec) | 7,357.11 | ||
| For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details. | |||
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| Global Count Rates | |||
| Source only | 0.012 | 92.845 | |
| Background (sky+dark) | 271.834 | 2,174,673.45 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Flat in units of Fλ |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 25.0 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | |
| Line at | Center 1550.0 Å FWHM 1.0 Å Flux 2e-16 Fλ |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 25.1
