ETC Request ID: STIS.ta.1003655

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.2443 seconds

gives: Time to Saturation (for a single exposure) = 199.31 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 1,662.253 2,068.30 45.48
    Background 0.163 0.20 0.45
        Sky 0.001 1.36e-03 0.04
        Dark Current 0.162 0.20 0.45
    Read Out 24.60
Total in selected region 1,662.416 2,068.50 51.71
Brightest Pixel (single exposure) 602.082 749.16
Global Count Rates
    Source only 3,324.507 4,136.597
    Background (sky+dark) 18,944.019 23,571.55
Background per unit area
    Sky Background (arcsec-2) 0.049 0.060
    Dark Current (arcsec-2) 7.200 8.959
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 7413.92 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
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 = 10.2 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

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These results were computed using: ETC version 25.2