ETC Request ID: STIS.ta.1297462
Exposure time (seconds) = 3.0000
gives: SNR = 141.8602
gives: Time to Saturation (for a single exposure) = 42.41 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 | 6,913.713 | 20,741.14 | 144.02 |
| Background | 0.227 | 0.68 | 0.82 |
| Sky | 0.002 | 4.69e-03 | 0.07 |
| Dark Current | 0.225 | 0.68 | 0.82 |
| Read Out | 25.20 | ||
| Total in selected region | 6,913.940 | 20,741.82 | 146.21 |
| Brightest Pixel (single exposure) | 2,829.268 | 8,487.80 | |
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| Global Count Rates | |||
| Source only | 13,827.427 | 41,482.280 | |
| Background (sky+dark) | 26,257.865 | 78,773.59 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 0.070 | 0.209 | |
| Dark Current (arcsec-2) | 10.000 | 30.000 | |
| 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 | 0.20 | ||
| Effective Wavelength | 6760.81 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F25ND3 |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: | medium |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: t5500feh150.dat |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 9.02 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 26.2
