ETC Request ID: STIS.sp.1443469
Exposure time (seconds) = 1,000.0000 at wavelength 1400.00 Å
gives: SNR = 2.1591 (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 | 0.003 | 6.89 | 2.63 |
| Background | 0.002 | 3.30 | 1.82 |
| Sky | 3.719e-12 | 7.44e-09 | 8.62e-05 |
| Dark Current | 0.002 | 3.30 | 1.82 |
| Total in selected region | 0.005 | 10.19 | 3.19 |
| Brightest Pixel (single exposure) (at 1217.70 Å) | 0.011 | 10.92 | |
| Count rate entire detector | 274.375 | ||
| Buffer Time (sec) | 7,289.30 | ||
| 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 | 4.287 | 4,287.006 | |
| Background (sky+dark) | 270.088 | 270,087.75 | |
| Encircled energy fraction | 0.72 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Power Law with index -2.3 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 2.4 applied before normalization |
| Normalization: | Flux 1e-05 jy at 2000.0 Å |
| 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 28.2
