ETC Request ID: STIS.sp.820556
Exposure time (seconds) = 2,750.0000 at wavelength 1240.00 Å
gives: SNR = 27.9960 (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 pix) | (2.0 pix resel x pix) | |
| Source | 0.188 | 1,035.04 | 32.17 |
| Background | 0.001 | 5.78 | 2.40 |
| Sky | 9.232e-14 | 5.08e-10 | 2.25e-05 |
| Dark Current | 0.001 | 5.78 | 2.40 |
| Total in selected region | 0.189 | 1,040.81 | 36.97 |
| Brightest Pixel (single exposure) (at 1318.23 Å) | 0.142 | 390.89 | |
| Count rate entire detector | 11,200.195 | ||
| Buffer Time (sec) | 178.57 | ||
| 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 | 6,652.255 | 18,293,702.502 | |
| Background (sky+dark) | 157.420 | 432,905.83 | |
| Encircled energy fraction | 0.90 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: sk-69104IUE_coadded.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
