ETC Request ID: STIS.sp.1008264
Exposure time (seconds) = 740.0000 at wavelength 1450.00 Å
gives: SNR = 54.3665 (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 | 1.999 | 2,958.31 | 54.39 |
| Background | 0.002 | 2.59 | 1.61 |
| Sky | 6.238e-12 | 9.23e-09 | 9.61e-05 |
| Dark Current | 0.002 | 2.59 | 1.61 |
| Total in selected region | 2.001 | 2,960.90 | 54.41 |
| Brightest Pixel (single exposure) (at 1254.90 Å) | 5.127 | 3,794.25 | |
| Count rate entire detector | 2,550.185 | ||
| Buffer Time (sec) | 784.26 | ||
| 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 | 2,174.889 | 1,609,417.583 | |
| Background (sky+dark) | 375.296 | 277,719.00 | |
| Encircled energy fraction | 0.83 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | medium |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: mrk509fos.txt |
| 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
