ETC Request ID: STIS.ta.825240

Exposure time (seconds) = 0.1000

gives: SNR = 94.7309

gives: Time to Saturation (for a single exposure) = 1.42 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 306,418.779 30,641.88 175.05
    Background 19.456 1.95 1.39
        Sky 2.336e-04 2.34e-05 4.83e-03
        Dark Current 19.456 1.95 1.39
    Read Out 272.00
Total in selected region 306,438.235 30,643.82 323.46
Brightest Pixel (single exposure) 84,275.576 8,427.56
Global Count Rates
    Source only 322,046.004 32,204.600
    Background (sky+dark) 19,922.944 1,992.29
Background per unit area
    Sky Background (arcsec-2) 0.016 0.002
    Dark Current (arcsec-2) 7.600 0.760
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 4640.08 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:


Target: [point source]
Spectrum: Kurucz Models B1V 25400 3.9
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.04 applied before normalization
Normalization: Renormalized to vegamag = 4.33 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2