ETC Request ID: STIS.sp.1009265
Requested Signal/Noise Ratio = 10.000 at wavelength 1215.90 Å (per resolution element)
gives: Time = 19,146.7271 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 7 pix) | (2 pix resel x 7 pix) | |
| Source | 0.007 | 275.46 | 16.60 |
| Background | 0.013 | 483.33 | 21.98 |
| Sky | 0.012 | 443.12 | 21.05 |
| Dark Current | 0.001 | 40.21 | 6.34 |
| Total in selected region | 0.020 | 758.79 | 27.55 |
| Brightest Pixel (single exposure) (at 1215.80 Å) | 0.011 | 219.93 | |
| Count rate entire detector | 233.367 | ||
| Buffer Time (sec) | 8,570.20 | ||
| 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 | 0.033 | 635.290 | |
| Background (sky+dark) | 233.334 | 4,467,574.13 | |
| Encircled energy fraction | 0.76 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1222 |
| Grating: | [G140M] R ~ 10000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Empty |
| Extinction E(B-V): | None |
| Normalization: | None |
| Redshift: | None |
| Emission Lines: | |
| Line at | Center 1215.9 Å FWHM 0.16 Å Flux 1.2e-15 Fλ |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 25.2
