ETC Request ID: STIS.sp.1045283
Requested Signal/Noise Ratio = 24.000 at wavelength 1500.00 Å (per resolution element)
gives: Time = 5,603.2143 seconds
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 | 0.052 | 587.54 | 24.24 |
| Background | 0.001 | 11.77 | 3.43 |
| Sky | 1.932e-11 | 2.17e-07 | 4.65e-04 |
| Dark Current | 0.001 | 11.77 | 3.43 |
| Total in selected region | 0.053 | 599.30 | 24.48 |
| Brightest Pixel (single exposure) (at 1238.10 Å) | 0.096 | 537.20 | |
| Count rate entire detector | 527.589 | ||
| Buffer Time (sec) | 3,790.83 | ||
| 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 | 87.422 | 489,846.505 | |
| Background (sky+dark) | 440.166 | 2,466,345.67 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.5 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Non-stellar Objects QSO (SDSS based) [800, 8554.5 Å z=0] |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.1 applied before normalization |
| Normalization: | Flux 1.47e-15 flam at 2310.0 Å |
| Redshift: | z=0.018 |
| 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
