ETC Request ID: STIS.sp.1173362
Requested Signal/Noise Ratio = 10.000 at wavelength 2200.00 Å (per resolution element)
gives: Time = 839.7025 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 | 0.072 | 120.26 | 10.97 |
| Background | 0.011 | 17.63 | 4.20 |
| Sky | 5.433e-09 | 9.12e-06 | 3.02e-03 |
| Dark Current | 0.011 | 17.63 | 4.20 |
| Total in selected region | 0.082 | 137.89 | 12.03 |
| Brightest Pixel (single exposure) (at 2319.00 Å) | 0.040 | 33.37 | |
| Count rate entire detector | 2,677.719 | ||
| Buffer Time (sec) | 746.90 | ||
| 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 | 869.965 | 730,511.785 | |
| Background (sky+dark) | 1,572.864 | 1,320,737.94 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Flat in units of Fλ |
| Extinction E(B-V): | None |
| Normalization: | Flux 1e-13 flam at 5500.0 Å |
| 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 26.1
