ETC Request ID: STIS.sp.1368112
Requested Signal/Noise Ratio = 10.000 at wavelength 2376.00 Å (per resolution element)
gives: Time = 11,665.1724 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 | 0.010 | 237.53 | 15.41 |
| Background | 0.014 | 326.66 | 18.07 |
| Sky | 1.470e-06 | 0.03 | 0.19 |
| Dark Current | 0.014 | 326.62 | 18.07 |
| Total in selected region | 0.024 | 564.18 | 23.75 |
| Brightest Pixel (single exposure) (at 2798.40 Å) | 0.007 | 86.83 | |
| Count rate entire detector | 2,109.598 | ||
| Buffer Time (sec) | 948.05 | ||
| 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 | 8.151 | 95,085.719 | |
| Background (sky+dark) | 2,101.447 | 24,513,739.74 | |
| 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): | None |
| Normalization: | Renormalized to abmag = 20.0 in filter Sloan/R |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 27.2
