ETC Request ID: STIS.ta.822658
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.0367 seconds
gives: Time to Saturation (for a single exposure) = 1.86 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Result of the calculation 0.0367497 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 32 x 32 pixels) | |||
| Source | 318,626.372 | 11,709.44 | 108.21 |
| Background | 24.789 | 0.91 | 0.95 |
| Sky | 5.333 | 0.20 | 0.44 |
| Dark Current | 19.456 | 0.72 | 0.85 |
| Read Out | 272.00 | ||
| Total in selected region | 318,651.161 | 11,710.35 | 292.74 |
| Brightest Pixel (single exposure) | 64,403.023 | 2,366.79 | |
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| Global Count Rates | |||
| Source only | 348,054.117 | 12,790.901 | |
| Background (sky+dark) | 20,093.594 | 738.43 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 33.330 | 1.225 | |
| Dark Current (arcsec-2) | 7.600 | 0.279 | |
| Extraction region | |||
| box of 32 x 32 pixels | |||
| Effective Sky Area (pixels) | 64.00 | ||
| Fraction of flux | 0.92 | ||
| Fraction of flux in brightest pixel | 0.19 | ||
| Effective Wavelength | 7304.53 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ/PEAK |
| Aperture: | 52X0.1 |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: dim.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 24.2
