ETC Request ID: STIS.ta.1004020

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.8209 seconds

gives: Time to Saturation (for a single exposure) = 186.67 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 1,135.897 2,068.36 45.48
    Background 0.163 0.30 0.54
        Sky 0.001 1.91e-03 0.04
        Dark Current 0.162 0.29 0.54
    Read Out 24.60
Total in selected region 1,136.060 2,068.65 51.71
Brightest Pixel (single exposure) 642.840 1,170.55
Global Count Rates
    Source only 2,271.795 4,136.715
    Background (sky+dark) 18,941.131 34,489.94
Background per unit area
    Sky Background (arcsec-2) 0.047 0.085
    Dark Current (arcsec-2) 7.200 13.110
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 3737.73 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: Kurucz Models K0V 5250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.1 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2