ETC Request ID: STIS.ta.1367866
Requested Signal/Noise Ratio = 40.000
gives: Time = 2.0495 seconds
gives: Time to Saturation (for a single exposure) = 305.71 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 | 1,018.661 | 2,087.73 | 45.69 |
| Background | 0.666 | 1.37 | 1.17 |
| Sky | 0.432 | 0.89 | 0.94 |
| Dark Current | 0.234 | 0.48 | 0.69 |
| Read Out | 25.20 | ||
| Total in selected region | 1,019.328 | 2,089.10 | 52.19 |
| Brightest Pixel (single exposure) | 392.530 | 804.48 | |
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| Global Count Rates | |||
| Source only | 2,037.322 | 4,175.461 | |
| Background (sky+dark) | 54,817.750 | 112,348.12 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 19.221 | 39.392 | |
| Dark Current (arcsec-2) | 10.400 | 21.315 | |
| 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 | 0.19 | ||
| Effective Wavelength | 7093.52 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F28X50LP |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: | medium |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: d6_6400_575.dat |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 17.0 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 27.2
