ETC Request ID: STIS.ta.825915
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.0021 seconds
gives: Time to Saturation (for a single exposure) = 0.85 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Result of the calculation 0.00210201 is less than the minimum exposure time for this detector (0.1)
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 | 997,285.273 | 2,096.30 | 45.79 |
| Background | 0.608 | 1.28e-03 | 0.04 |
| Sky | 0.437 | 9.18e-04 | 0.03 |
| Dark Current | 0.171 | 3.59e-04 | 0.02 |
| Read Out | 25.50 | ||
| Total in selected region | 997,285.881 | 2,096.30 | 52.41 |
| Brightest Pixel (single exposure) | 141,087.073 | 296.57 | |
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| Global Count Rates | |||
| Source only | 997,285.273 | 2,096.303 | |
| Background (sky+dark) | 47,758.524 | 100.39 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 19.417 | 0.041 | |
| Dark Current (arcsec-2) | 7.600 | 0.016 | |
| Extraction region | |||
| box of 3 x 3 pixels | |||
| Effective Sky Area (pixels) | 9.00 | ||
| Effective Wavelength | 7163.38 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F28X50LP |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: |
| Target: [extended source] | |
| Source diameter (arcsec): | 0.15 |
| Spectrum: | Standard HST Star Spectra Solar Spectrum (G2V, -26.75) [1195.0, 26957.4 Å] |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to abmag = 5.9 in filter Sloan/R |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 24.2
