ETC Request ID: STIS.ta.1048625

Exposure time (seconds) = 0.1000

gives: SNR = 294.0528

gives: Time to Saturation (for a single exposure) = 0.33 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 1,316,805.607 131,680.56 362.88
    Background 18.432 1.84 1.36
        Sky 2.329e-04 2.33e-05 4.83e-03
        Dark Current 18.432 1.84 1.36
    Read Out 262.40
Total in selected region 1,316,824.039 131,682.40 447.81
Brightest Pixel (single exposure) 362,994.671 36,299.47
Global Count Rates
    Source only 1,383,570.791 138,357.079
    Background (sky+dark) 18,874.368 1,887.44
Background per unit area
    Sky Background (arcsec-2) 0.016 0.002
    Dark Current (arcsec-2) 7.200 0.720
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 6.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.26
Effective Wavelength 4611.66 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.3X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B0III 29000 3.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.07 applied before normalization
Normalization: Renormalized to vegamag = 2.77 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2