ETC Request ID: STIS.ta.824079
Exposure time (seconds) = 5.0000
gives: SNR = 69.0707
gives: Time to Saturation (for a single exposure) = 257.48 seconds
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 3 x 3 pixels) | |||
| Source | 1,070.247 | 5,351.23 | 73.15 |
| Background | 0.171 | 0.86 | 0.92 |
| Sky | 8.950e-06 | 4.47e-05 | 6.69e-03 |
| Dark Current | 0.171 | 0.85 | 0.92 |
| Read Out | 25.50 | ||
| Total in selected region | 1,070.418 | 5,352.09 | 77.47 |
| Brightest Pixel (single exposure) | 466.049 | 2,330.24 | |
|
|
|||
| Global Count Rates | |||
| Source only | 2,140.493 | 10,702.467 | |
| Background (sky+dark) | 19,923.193 | 99,615.96 | |
|
|
|||
| Background per unit area | |||
| Sky Background (arcsec-2) | 3.978e-04 | 0.002 | |
| Dark Current (arcsec-2) | 7.600 | 38.000 | |
| 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 | 0.22 | ||
| Effective Wavelength | 6357.57 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: | Castelli-Kurucz Models B8V 12000 4.0 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 5.02 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 24.2
