ETC Request ID: STIS.ta.1301962
Requested Signal/Noise Ratio = 40.000
gives: Time = 0.0712 seconds
gives: Time to Saturation (for a single exposure) = 2.72 seconds
Exposure time calculation HAD WARNINGS.
WARNING MESSAGE: Result of the calculation 0.0712124 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 | 162,638.105 | 11,581.86 | 107.62 |
| Background | 25.600 | 1.82 | 1.35 |
| Sky | 2.326e-04 | 1.66e-05 | 4.07e-03 |
| Dark Current | 25.600 | 1.82 | 1.35 |
| Read Out | 268.80 | ||
| Total in selected region | 162,663.705 | 11,583.68 | 289.55 |
| Brightest Pixel (single exposure) | 44,197.929 | 3,147.44 | |
|
|
|||
| Global Count Rates | |||
| Source only | 171,184.392 | 12,190.458 | |
| Background (sky+dark) | 26,214.400 | 1,866.79 | |
|
|
|||
| Background per unit area | |||
| Sky Background (arcsec-2) | 0.016 | 0.001 | |
| Dark Current (arcsec-2) | 10.000 | 0.712 | |
| 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 = 4.93 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 26.2
