ETC Request ID: STIS.ta.1301898
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.0956 seconds
gives: Time to Saturation (for a single exposure) = 3.65 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Result of the calculation 0.095622 is less than the minimum exposure time for this detector (0.1)
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 32 x 32 pixels) | |||
| Source | 121,121.797 | 11,581.90 | 107.62 |
| Background | 25.600 | 2.45 | 1.56 |
| Sky | 2.326e-04 | 2.22e-05 | 4.72e-03 |
| Dark Current | 25.600 | 2.45 | 1.56 |
| Read Out | 268.80 | ||
| Total in selected region | 121,147.397 | 11,584.35 | 289.55 |
| Brightest Pixel (single exposure) | 32,915.617 | 3,147.46 | |
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| Global Count Rates | |||
| Source only | 127,486.490 | 12,190.507 | |
| Background (sky+dark) | 26,214.400 | 2,506.67 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 0.016 | 0.001 | |
| Dark Current (arcsec-2) | 10.000 | 0.956 | |
| Extraction region | |||
| box of 32 x 32 pixels | |||
| Effective Sky Area (pixels) | 6.00 | ||
| Fraction of flux | 0.95 | ||
| Fraction of flux in brightest pixel | 0.26 | ||
| Effective Wavelength | 4787.86 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ/PEAK |
| Aperture: | 0.3X0.05ND |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: | medium |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models B3V 19000 4.0 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 5.25 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 26.2
