ETC Request ID: STIS.ta.825238
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.9855 seconds
gives: Time to Saturation (for a single exposure) = 123.44 seconds
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 3 x 3 pixels) | |||
| Source | 2,127.244 | 2,096.41 | 45.79 |
| Background | 0.171 | 0.17 | 0.41 |
| Sky | 8.950e-06 | 8.82e-06 | 2.97e-03 |
| Dark Current | 0.171 | 0.17 | 0.41 |
| Read Out | 25.50 | ||
| Total in selected region | 2,127.415 | 2,096.57 | 52.41 |
| Brightest Pixel (single exposure) | 972.124 | 958.03 | |
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| Global Count Rates | |||
| Source only | 4,254.488 | 4,192.813 | |
| Background (sky+dark) | 19,923.193 | 19,634.38 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 3.978e-04 | 3.920e-04 | |
| Dark Current (arcsec-2) | 7.600 | 7.490 | |
| 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 | 0.23 | ||
| Effective Wavelength | 5945.32 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F25ND5 |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: |
| Target: [point source] | |
| Spectrum: | Kurucz Models B1V 25400 3.9 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.04 applied before normalization |
| Normalization: | Renormalized to vegamag = 4.33 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 24.2
