ETC Request ID: STIS.sp.733962
Exposure time (seconds) = 3,000.0000 at wavelength 1400.00 Å
gives: SNR = 38.1373 (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 | 0.243 | 1,460.73 | 38.22 |
| Background | 0.001 | 6.30 | 2.51 |
| Sky | 2.425e-12 | 1.45e-08 | 1.21e-04 |
| Dark Current | 0.001 | 6.30 | 2.51 |
| Total in selected region | 0.245 | 1,467.03 | 38.30 |
| Brightest Pixel (single exposure) (at 1241.10 Å) | 0.281 | 843.21 | |
| Count rate entire detector | 514.305 | ||
| 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 | 242.178 | 726,533.559 | |
| Background (sky+dark) | 272.128 | 816,382.58 | |
| Encircled energy fraction | 0.82 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: |
| 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
