ETC Request ID: STIS.ta.1430937

Exposure time (seconds) = 0.2000

gives: SNR = 183.6906

gives: Time to Saturation (for a single exposure) = 1.98 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 172,051.683 34,410.34 185.50
    Background 0.675 0.14 0.37
        Sky 0.432 0.09 0.29
        Dark Current 0.243 0.05 0.22
    Read Out 26.10
Total in selected region 172,052.358 34,410.47 187.33
Brightest Pixel (single exposure) 60,646.703 12,129.34
Global Count Rates
    Source only 344,103.366 68,820.673
    Background (sky+dark) 55,864.519 11,172.90
Background per unit area
    Sky Background (arcsec-2) 19.219 3.844
    Dark Current (arcsec-2) 10.800 2.160
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 7547.42 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: Castelli-Kurucz Models K7V 4000 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.1 in bandpass defined above.
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.1