ETC Request ID: STIS.sp.821465
Requested Signal/Noise Ratio = 60.000 at wavelength 1392.00 Å (per resolution element)
gives: Time = 10,608.9635 seconds
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 | 0.171 | 3,622.14 | 60.18 |
| Background | 0.001 | 22.28 | 4.72 |
| Sky | 2.310e-12 | 4.90e-08 | 2.21e-04 |
| Dark Current | 0.001 | 22.28 | 4.72 |
| Total in selected region | 0.172 | 3,644.42 | 60.37 |
| Brightest Pixel (single exposure) (at 1215.30 Å) | 1.615 | 17,131.89 | |
| Count rate entire detector | 538.494 | ||
| Buffer Time (sec) | 3,714.06 | ||
| 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 | 266.500 | 2,827,291.734 | |
| Background (sky+dark) | 271.994 | 2,885,573.11 | |
| Encircled energy fraction | 0.82 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: Mrk493_forETC_daeseong.dat |
| 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
