ETC Request ID: STIS.sp.1007784
Exposure time (seconds) = 1,000.0000 at wavelength 1240.00 Å
gives: SNR = 8.8722 (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 7 pix) | (2 pix resel x 7 pix) | |
| Source | 0.040 | 80.76 | 8.99 |
| Background | 0.001 | 2.10 | 1.45 |
| Sky | 1.320e-12 | 2.64e-09 | 5.14e-05 |
| Dark Current | 0.001 | 2.10 | 1.45 |
| Total in selected region | 0.041 | 82.86 | 9.10 |
| Brightest Pixel (single exposure) (at 1215.75 Å) | 0.021 | 21.14 | |
| Count rate entire detector | 281.698 | ||
| Buffer Time (sec) | 7,099.80 | ||
| 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 | 48.364 | 48,364.385 | |
| Background (sky+dark) | 233.334 | 233,333.57 | |
| Encircled energy fraction | 0.77 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1222 |
| Grating: | [G140M] R ~ 10000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Flat in units of Fν |
| Extinction E(B-V): | None |
| Normalization: | Flux 1.9e-14 flam at 1530.0 Å |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 25.2
