ETC Request ID: STIS.sp.825100
Exposure time (seconds) = 1,119.0000 at wavelength 1445.00 Å
gives: SNR = 3.9941 (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 | 0.008 | 18.03 | 4.25 |
| Background | 0.001 | 2.35 | 1.53 |
| Sky | 3.320e-12 | 7.43e-09 | 8.62e-05 |
| Dark Current | 0.001 | 2.35 | 1.53 |
| Total in selected region | 0.009 | 20.38 | 4.51 |
| Brightest Pixel (single exposure) (at 1217.70 Å) | 0.014 | 15.55 | |
| Count rate entire detector | 280.292 | ||
| Buffer Time (sec) | 7,135.41 | ||
| 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 | 8.298 | 9,285.692 | |
| Background (sky+dark) | 271.994 | 304,361.15 | |
| Encircled energy fraction | 0.83 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Non-stellar Objects QSO (FOS based) [100, 3387 Å z=0] |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.02 applied before normalization |
| Normalization: | Renormalized to abmag = 20.13 in filter Galex/FUV |
| Redshift: | z=1.67 |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 24.2
