ETC Request ID: STIS.ta.1029813

Exposure time (seconds) = 0.7000

gives: SNR = 236.5227

gives: Time to Saturation (for a single exposure) = 3.89 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 80,774.086 56,541.86 237.79
    Background 0.163 0.11 0.34
        Sky 0.001 7.65e-04 0.03
        Dark Current 0.162 0.11 0.34
    Read Out 24.60
Total in selected region 80,774.249 56,541.97 239.05
Brightest Pixel (single exposure) 30,841.177 21,588.82
Global Count Rates
    Source only 161,548.172 113,083.721
    Background (sky+dark) 18,944.019 13,260.81
Background per unit area
    Sky Background (arcsec-2) 0.049 0.034
    Dark Current (arcsec-2) 7.200 5.040
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 0.19
Effective Wavelength 7141.39 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Kurucz Models G8V 5570 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 5.95 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.2