ETC Request ID: STIS.sp.733959
Exposure time (seconds) = 3,000.0000 at wavelength 2000.00 Å
gives: SNR = 43.5415 (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 | 0.326 | 1,956.90 | 44.24 |
| Background | 0.011 | 63.00 | 7.94 |
| Sky | 6.281e-08 | 3.77e-04 | 0.02 |
| Dark Current | 0.011 | 63.00 | 7.94 |
| Total in selected region | 0.337 | 2,019.90 | 44.94 |
| Brightest Pixel (single exposure) (at 2856.00 Å) | 0.320 | 961.43 | |
| Count rate entire detector | 2,049.825 | ||
| 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 | 475.166 | 1,425,497.446 | |
| Background (sky+dark) | 1,574.659 | 4,723,978.15 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| 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) = 0.06 applied before normalization |
| Normalization: | Flux 1e-14 flam at 1400.0 Å |
| Redshift: | z=0.0206 |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 23.2
