ETC Request ID: STIS.sp.1407202
Exposure time (seconds) = 6,850.0000 at wavelength 1425.00 Å
gives: SNR = 194.4323 (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 | 2.761 | 37,826.50 | 194.49 |
| Background | 0.002 | 22.61 | 4.75 |
| Sky | 4.480e-11 | 6.14e-07 | 7.83e-04 |
| Dark Current | 0.002 | 22.61 | 4.75 |
| Total in selected region | 2.763 | 37,849.11 | 194.55 |
| Brightest Pixel (single exposure) (at 1272.30 Å) | 1.455 | 9,964.68 | |
| Count rate entire detector | 4,747.051 | ||
| Buffer Time (sec) | 421.31 | ||
| 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 | 3,461.751 | 23,712,992.666 | |
| Background (sky+dark) | 1,285.300 | 8,804,304.54 | |
| Encircled energy fraction | 0.72 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X2 |
| Glow region: | low |
| 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
