ETC Request ID: STIS.sp.415432
Exposure time (seconds) = 1,751.0000 at wavelength 1215.90 Å
gives: SNR = 14.7380 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Partial overlap between instrument throughput band and input spectrum.
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 | 0.063 | 220.83 | 14.86 |
| Background | 0.001 | 3.68 | 1.92 |
| Sky | 5.634e-08 | 1.97e-04 | 0.01 |
| Dark Current | 0.001 | 3.68 | 1.92 |
| Total in selected region | 0.064 | 224.50 | 14.98 |
| Brightest Pixel (single exposure) (at 1215.95 Å) | 0.029 | 50.87 | |
| Count rate entire detector | 197.463 | ||
| Buffer Time (sec) | |||
| 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 | 1.396 | 2,445.191 | |
| Background (sky+dark) | 196.067 | 343,312.55 | |
| Encircled energy fraction | 0.76 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1222 |
| Grating: | [G140M] R ~ 10000 |
| Aperture: | 52X0.1 |
| Glow region: |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum |
| Extinction E(B-V): | None |
| Normalization: | None |
| 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 20.2
