ETC Request ID: STIS.ta.825531
Exposure time (seconds) = 4.0000
gives: SNR = 166.9995
gives: Time to Saturation (for a single exposure) = 50.77 seconds
| Detailed Information | Count rate | Total counts | Associated noise |
| (e-/s) | (e-) | (e-) | |
| Counts (box of 3 x 3 pixels) | |||
| Source | 7,131.314 | 28,525.26 | 168.89 |
| Background | 0.171 | 0.68 | 0.83 |
| Sky | 8.950e-06 | 3.58e-05 | 5.98e-03 |
| Dark Current | 0.171 | 0.68 | 0.83 |
| Read Out | 25.50 | ||
| Total in selected region | 7,131.485 | 28,525.94 | 170.81 |
| Brightest Pixel (single exposure) | 2,363.419 | 9,453.68 | |
|
|
|||
| Global Count Rates | |||
| Source only | 14,262.629 | 57,050.515 | |
| Background (sky+dark) | 19,923.193 | 79,692.77 | |
|
|
|||
| Background per unit area | |||
| Sky Background (arcsec-2) | 3.978e-04 | 0.002 | |
| Dark Current (arcsec-2) | 7.600 | 30.400 | |
| 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 | 0.17 | ||
| Effective Wavelength | 7832.28 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 K3-4II 4255.98K |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.08 applied before normalization |
| Normalization: | Renormalized to vegamag = 3.9 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
These results were computed using: ETC version 24.2
