ETC Request ID: STIS.sp.1368385
Requested Signal/Noise Ratio = 10.000 at wavelength 1613.00 Å (per resolution element)
gives: Time = 2,144.5655 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 | 0.026 | 111.14 | 10.54 |
| Background | 0.001 | 4.50 | 2.12 |
| Sky | 1.024e-13 | 4.39e-10 | 2.10e-05 |
| Dark Current | 0.001 | 4.50 | 2.12 |
| Total in selected region | 0.027 | 115.64 | 11.11 |
| Brightest Pixel (single exposure) (at 1595.01 Å) | 0.010 | 21.34 | |
| Count rate entire detector | 857.454 | ||
| Buffer Time (sec) | 2,332.49 | ||
| 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 | 489.632 | 1,050,046.849 | |
| Background (sky+dark) | 157.286 | 337,310.99 | |
| Encircled energy fraction | 0.94 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1562 |
| Grating: | [E140H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models A3V 8750 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.03 applied before normalization |
| Normalization: | Renormalized to abmag = 11.9 in filter Galex/FUV |
| 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 27.2
