ETC Request ID: STIS.ta.756304
Exposure time (seconds) = 0.1000
gives: SNR = 222.2670
gives: Time to Saturation (for a single exposure) = 0.66 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Partial overlap between instrument throughput band and target spectrum. Please doublecheck the wavelength range covered by the selected spectrum, and the instrument documentation for the selected filter.
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 3 x 3 pixels) | |||
| Source | 500,445.864 | 50,044.59 | 223.71 |
| Background | 0.609 | 0.06 | 0.25 |
| Sky | 0.438 | 0.04 | 0.21 |
| Dark Current | 0.171 | 0.02 | 0.13 |
| Read Out | 25.50 | ||
| Total in selected region | 500,446.472 | 50,044.65 | 225.16 |
| Brightest Pixel (single exposure) | 181,904.932 | 18,190.49 | |
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| Global Count Rates | |||
| Source only | 1,000,891.727 | 100,089.173 | |
| Background (sky+dark) | 47,816.621 | 4,781.66 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 19.457 | 1.946 | |
| Dark Current (arcsec-2) | 7.600 | 0.760 | |
| Extraction region | |||
| box of 3 x 3 pixels | |||
| Effective Sky Area (pixels) | 9.00 | ||
| Fraction of flux | 0.50 | ||
| Fraction of flux in brightest pixel | 0.18 | ||
| Effective Wavelength | 7396.03 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F28X50LP |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: rylup_ascii.dat |
| Extinction E(B-V): | None |
| Normalization: | None |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version ???
