ETC Request ID: STIS.sp.1407204
Exposure time (seconds) = 6,850.0000 at wavelength 2376.00 Å
gives: SNR = 174.4412 (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 11 pixels high) | (1 pix x 11 pix) | (2 pix resel x 11 pix) | |
| Source | 2.245 | 30,757.87 | 175.38 |
| Background | 0.024 | 331.68 | 18.21 |
| Sky | 9.948e-06 | 0.14 | 0.37 |
| Dark Current | 0.024 | 331.54 | 18.21 |
| Total in selected region | 2.269 | 31,089.55 | 176.32 |
| Brightest Pixel (single exposure) (at 2299.20 Å) | 0.859 | 5,885.38 | |
| Count rate entire detector | 4,254.342 | ||
| Buffer Time (sec) | 470.11 | ||
| 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 | 1,930.253 | 13,222,235.538 | |
| Background (sky+dark) | 2,324.088 | 15,920,004.91 | |
| Encircled energy fraction | 0.79 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X2 |
| Target: [point source] | |
| Spectrum: | Standard HST Star Spectra WD1657+343 (DAI, 16.1) [900.0, 300000.0] |
| 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 28.1
