ETC Request ID: STIS.sp.415446
Exposure time (seconds) = 1,882.0000 at wavelength 1215.90 Å
gives: SNR = 23.3561 (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 | 0.146 | 549.43 | 23.44 |
| Background | 0.001 | 3.95 | 1.99 |
| Sky | 5.634e-08 | 2.12e-04 | 0.01 |
| Dark Current | 0.001 | 3.95 | 1.99 |
| Total in selected region | 0.147 | 553.38 | 23.52 |
| Brightest Pixel (single exposure) (at 1216.00 Å) | 0.065 | 121.89 | |
| Count rate entire detector | 200.887 | ||
| 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 | 4.820 | 9,071.765 | |
| Background (sky+dark) | 196.067 | 368,997.27 | |
| 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
