ETC Request ID: STIS.sp.827811
Exposure time (seconds) = 2,000.0000 at wavelength 1300.00 Å
gives: SNR = 19.5978 (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 | 0.121 | 485.03 | 22.02 |
| Background | 0.001 | 4.20 | 2.05 |
| Sky | 8.434e-15 | 3.37e-11 | 5.81e-06 |
| Dark Current | 0.001 | 4.20 | 2.05 |
| Total in selected region | 0.122 | 489.23 | 24.75 |
| Brightest Pixel (single exposure) (at 1320.92 Å) | 0.044 | 88.92 | |
| Count rate entire detector | 3,856.997 | ||
| Buffer Time (sec) | 518.54 | ||
| 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 | 2,228.660 | 4,457,320.112 | |
| Background (sky+dark) | 157.420 | 314,840.60 | |
| 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: WD2149+021.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 24.2
