ETC Request ID: STIS.sp.1021625
Exposure time (seconds) = 1,000.0000 at wavelength 1300.00 Å
gives: SNR = 14.8532 (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 7 pix) | (2 pix resel x 7 pix) | |
| Source | 0.139 | 278.37 | 16.68 |
| Background | 0.001 | 2.10 | 1.45 |
| Sky | 8.390e-15 | 1.68e-11 | 4.10e-06 |
| Dark Current | 0.001 | 2.10 | 1.45 |
| Total in selected region | 0.140 | 280.47 | 18.74 |
| Brightest Pixel (single exposure) (at 1297.42 Å) | 0.049 | 48.94 | |
| Count rate entire detector | 4,457.265 | ||
| Buffer Time (sec) | 448.71 | ||
| 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 | 2,590.268 | 2,590,268.157 | |
| Background (sky+dark) | 157.419 | 157,418.51 | |
| Encircled energy fraction | 0.93 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: WD1844-223.etc |
| 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 25.2
