ETC Request ID: STIS.ta.1439507

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.9781 seconds

gives: Time to Saturation (for a single exposure) = 98.03 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 2,162.729 2,115.42 45.99
    Background 0.244 0.24 0.49
        Sky 0.001 1.02e-03 0.03
        Dark Current 0.243 0.24 0.49
    Read Out 26.10
Total in selected region 2,162.973 2,115.65 52.89
Brightest Pixel (single exposure) 1,224.073 1,197.29
Global Count Rates
    Source only 4,325.457 4,230.831
    Background (sky+dark) 28,377.923 27,757.11
Background per unit area
    Sky Background (arcsec-2) 0.046 0.045
    Dark Current (arcsec-2) 10.800 10.564
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 0.28
Effective Wavelength 3739.27 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: User uploaded spectrum: AV393_STIS_E230M_c1978_sed.fits
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.6 in filter Johnson/U
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 28.1