ETC Request ID: STIS.sp.822448
Exposure time (seconds) = 56,800.0000 at wavelength 1850.00 Å
gives: SNR = 26.4257 (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 | 0.012 | 1,377.91 | 37.12 |
| Background | 0.011 | 1,192.80 | 34.54 |
| Sky | 1.160e-11 | 1.32e-06 | 1.15e-03 |
| Dark Current | 0.011 | 1,192.80 | 34.54 |
| Total in selected region | 0.023 | 2,570.71 | 52.14 |
| Brightest Pixel (single exposure) (at 2080.35 Å) | 0.037 | 2,109.18 | |
| Count rate entire detector | 3,356.442 | ||
| Buffer Time (sec) | 595.87 | ||
| 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 | 1,201.876 | 68,266,530.788 | |
| Background (sky+dark) | 1,572.864 | 89,338,675.29 | |
| Encircled energy fraction | 0.92 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1963 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models F2V 7000 4.0 |
| Extinction E(B-V): | None |
| Normalization: | Flux 3e-13 flam at 1850.0 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 24.2
