ETC Request ID: STIS.sp.636603
Exposure time (seconds) = 480.0000 at wavelength 2818.00 Å
gives: SNR = 48.8880 (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 | 2.502 | 2,402.07 | 49.01 |
| Background | 0.013 | 12.10 | 3.48 |
| Sky | 1.051e-07 | 1.01e-04 | 0.01 |
| Dark Current | 0.013 | 12.10 | 3.48 |
| Total in selected region | 2.515 | 2,414.17 | 49.13 |
| Brightest Pixel (single exposure) (at 2773.18 Å) | 1.097 | 526.45 | |
| Count rate entire detector | 4,742.923 | ||
| 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 | 2,855.474 | 1,370,627.626 | |
| Background (sky+dark) | 1,887.449 | 905,975.56 | |
| Encircled energy fraction | 0.87 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 2818 |
| Grating: | [G230M] R ~ 10000 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | Standard HST Star Spectra AGK+81°266 (sdO, 11.94) [1148.6, 24955.1 Å] |
| Extinction E(B-V): | None |
| Normalization: | None |
| 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 22.2
