ETC Request ID: STIS.sp.824040
Exposure time (seconds) = 190.0000 at wavelength 1598.00 Å
gives: SNR = 17.2820 (per resolution element)
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Buffer time 32.1683 is less than minimum 99 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 | 0.845 | 320.92 | 17.91 |
| Background | 0.001 | 0.40 | 0.63 |
| Sky | 7.268e-15 | 2.76e-12 | 1.66e-06 |
| Dark Current | 0.001 | 0.40 | 0.63 |
| Total in selected region | 0.846 | 321.32 | 18.57 |
| Brightest Pixel (single exposure) (at 1497.71 Å) | 0.742 | 141.02 | |
| Count rate entire detector | 62,172.965 | ||
| Buffer Time (sec) | 32.17 | ||
| 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 | 32,812.369 | 6,234,350.105 | |
| Background (sky+dark) | 157.286 | 29,884.42 | |
| Encircled energy fraction | 0.94 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1598 |
| Grating: | [E140H] R ~ 114000 |
| Aperture: | 31X0.05NDA |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: cuvir.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
