ETC Request ID: STIS.sp.1045281
Requested Signal/Noise Ratio = 25.000 at wavelength 2310.00 Å (per resolution element)
gives: Time = 2,000.1615 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 | 0.166 | 664.51 | 25.78 |
| Background | 0.011 | 42.01 | 6.48 |
| Sky | 1.557e-06 | 6.23e-03 | 0.08 |
| Dark Current | 0.011 | 42.00 | 6.48 |
| Total in selected region | 0.177 | 706.52 | 26.58 |
| Brightest Pixel (single exposure) (at 2849.60 Å) | 0.116 | 232.96 | |
| Count rate entire detector | 1,740.070 | ||
| Buffer Time (sec) | 1,149.38 | ||
| 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 | 162.850 | 325,726.683 | |
| Background (sky+dark) | 1,577.220 | 3,154,694.47 | |
| Encircled energy fraction | 0.85 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.5 |
| 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
