ETC Request ID: STIS.ta.1038524

Exposure time (seconds) = 2.0000

gives: SNR = 63.3751

gives: Time to Saturation (for a single exposure) = 133.61 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 2,275.394 4,550.79 67.46
    Background 0.162 0.32 0.57
        Sky 8.945e-06 1.79e-05 4.23e-03
        Dark Current 0.162 0.32 0.57
    Read Out 24.60
Total in selected region 2,275.556 4,551.11 71.81
Brightest Pixel (single exposure) 898.170 1,796.34
Global Count Rates
    Source only 4,550.788 9,101.576
    Background (sky+dark) 18,874.616 37,749.23
Background per unit area
    Sky Background (arcsec-2) 3.975e-04 7.951e-04
    Dark Current (arcsec-2) 7.200 14.400
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 6962.17 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B3V 19000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.52 applied before normalization
Normalization: Renormalized to vegamag = 4.43 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2