ETC Request ID: STIS.ta.1421053

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2459 seconds

gives: Time to Saturation (for a single exposure) = 24.65 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 8,601.074 2,115.31 45.99
    Background 0.244 0.06 0.24
        Sky 0.001 2.56e-04 0.02
        Dark Current 0.243 0.06 0.24
    Read Out 26.10
Total in selected region 8,601.318 2,115.37 52.88
Brightest Pixel (single exposure) 4,867.593 1,197.11
Global Count Rates
    Source only 17,202.149 4,230.614
    Background (sky+dark) 28,377.923 6,979.13
Background per unit area
    Sky Background (arcsec-2) 0.046 0.011
    Dark Current (arcsec-2) 10.800 2.656
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 3737.99 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: Castelli-Kurucz Models G8V 5500 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 8.226 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.1