ETC Request ID: STIS.ta.757128
Exposure time (seconds) = 3.0000
gives: SNR = 52.2479
gives: Time to Saturation (for a single exposure) = 308.34 seconds
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 3 x 3 pixels) | |||
| Source | 1,090.890 | 3,272.67 | 57.21 |
| Background | 0.171 | 0.51 | 0.72 |
| Sky | 8.973e-06 | 2.69e-05 | 5.19e-03 |
| Dark Current | 0.171 | 0.51 | 0.72 |
| Read Out | 25.50 | ||
| Total in selected region | 1,091.061 | 3,273.18 | 62.64 |
| Brightest Pixel (single exposure) | 389.182 | 1,167.55 | |
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| Global Count Rates | |||
| Source only | 2,181.779 | 6,545.338 | |
| Background (sky+dark) | 19,923.193 | 59,769.58 | |
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| Background per unit area | |||
| Sky Background (arcsec-2) | 3.988e-04 | 0.001 | |
| Dark Current (arcsec-2) | 7.600 | 22.800 | |
| 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 | 0.18 | ||
| Effective Wavelength | 7489.73 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: | Pickles Models K2V 4886.52K |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 5.57 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 23.2rc1
