ETC Request ID: STIS.ta.1184854

Exposure time (seconds) = 0.1000

gives: SNR = 78.6372

gives: Time to Saturation (for a single exposure) = 4.35 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 67,643.987 6,764.40 82.25
    Background 0.659 0.07 0.26
        Sky 0.434 0.04 0.21
        Dark Current 0.225 0.02 0.15
    Read Out 25.20
Total in selected region 67,644.646 6,764.46 86.02
Brightest Pixel (single exposure) 27,616.341 2,761.63
Global Count Rates
    Source only 135,287.974 13,528.797
    Background (sky+dark) 53,877.858 5,387.79
Background per unit area
    Sky Background (arcsec-2) 19.296 1.930
    Dark Current (arcsec-2) 10.000 1.000
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 0.20
Effective Wavelength 6774.18 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: Standard HST Star Spectra AGK+81°266 (sdO, 11.94) [1148.6, 24955.1 Å]
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 26.1