ETC Request ID: STIS.ta.1021631
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.0854 seconds
gives: Time to Saturation (for a single exposure) = 12.22 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Result of the calculation 0.0853893 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 3 x 3 pixels) | |||
| Source | 24,220.870 | 2,068.20 | 45.48 |
| Background | 0.597 | 0.05 | 0.23 |
| Sky | 0.435 | 0.04 | 0.19 |
| Dark Current | 0.162 | 0.01 | 0.12 |
| Read Out | 24.60 | ||
| Total in selected region | 24,221.467 | 2,068.25 | 51.71 |
| Brightest Pixel (single exposure) | 9,817.578 | 838.32 | |
|
|
|||
| Global Count Rates | |||
| Source only | 48,441.740 | 4,136.405 | |
| Background (sky+dark) | 46,585.728 | 3,977.92 | |
|
|
|||
| Background per unit area | |||
| Sky Background (arcsec-2) | 19.330 | 1.651 | |
| Dark Current (arcsec-2) | 7.200 | 0.615 | |
| 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 | 6814.82 Å | ||
| Instrument name: | STIS |
| Mode: | Target Acquisition |
| Detector: | CCD |
| Acquisition Mode: | ACQ |
| Aperture: | F28X50LP |
| Gain: | 4.0 |
| # Frames: | 1 |
| Binning: | 1 |
| Dark: | medium |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: WD1134+300.etc |
| Extinction E(B-V): | None |
| Normalization: | None |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 25.2
