ETC Request ID: STIS.ta.1454449

Exposure time (seconds) = 1.0000

gives: SNR = 194.8667

gives: Time to Saturation (for a single exposure) = 7.81 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 38,643.105 38,643.10 196.58
    Background 0.675 0.68 0.82
        Sky 0.432 0.43 0.66
        Dark Current 0.243 0.24 0.49
    Read Out 26.10
Total in selected region 38,643.780 38,643.78 198.31
Brightest Pixel (single exposure) 15,359.493 15,359.49
Global Count Rates
    Source only 77,286.209 77,286.209
    Background (sky+dark) 55,864.519 55,864.52
Background per unit area
    Sky Background (arcsec-2) 19.219 19.219
    Dark Current (arcsec-2) 10.800 10.800
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 0.20
Effective Wavelength 6924.05 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: User uploaded spectrum: sk68d15_sed_new.fits
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 28.2