ETC Request ID: STIS.ta.1165991

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2447 seconds

gives: Time to Saturation (for a single exposure) = 34.36 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 8,528.807 2,086.92 45.68
    Background 0.227 0.06 0.24
        Sky 0.002 3.83e-04 0.02
        Dark Current 0.225 0.06 0.23
    Read Out 25.20
Total in selected region 8,529.034 2,086.97 52.17
Brightest Pixel (single exposure) 3,492.547 854.59
Global Count Rates
    Source only 17,057.614 4,173.832
    Background (sky+dark) 26,257.865 6,425.04
Background per unit area
    Sky Background (arcsec-2) 0.070 0.017
    Dark Current (arcsec-2) 10.000 2.447
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 6756.98 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models G2V 5750 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 8.75 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1