ETC Request ID: STIS.ta.1004163

Exposure time (seconds) = 3.0000

gives: SNR = 231.3613

gives: Time to Saturation (for a single exposure) = 18.13 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 18,042.332 54,127.00 232.65
    Background 0.163 0.49 0.70
        Sky 0.001 3.28e-03 0.06
        Dark Current 0.162 0.49 0.70
    Read Out 24.60
Total in selected region 18,042.495 54,127.49 233.95
Brightest Pixel (single exposure) 6,619.025 19,857.08
Global Count Rates
    Source only 36,084.664 108,253.993
    Background (sky+dark) 18,944.019 56,832.06
Background per unit area
    Sky Background (arcsec-2) 0.049 0.146
    Dark Current (arcsec-2) 7.200 21.600
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 7349.17 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: Pickles Models K0V 5188.00K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.65 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