ETC Request ID: STIS.ta.1166041

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.5950 seconds

gives: Time to Saturation (for a single exposure) = 80.57 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,507.760 2,086.96 45.68
    Background 0.225 0.13 0.37
        Sky 8.928e-06 5.31e-06 2.30e-03
        Dark Current 0.225 0.13 0.37
    Read Out 25.20
Total in selected region 3,507.985 2,087.10 52.17
Brightest Pixel (single exposure) 1,489.383 886.12
Global Count Rates
    Source only 7,015.521 4,173.929
    Background (sky+dark) 26,214.648 15,596.57
Background per unit area
    Sky Background (arcsec-2) 3.968e-04 2.361e-04
    Dark Current (arcsec-2) 10.000 5.950
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 0.21
Effective Wavelength 6547.37 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 A0V 9500 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 3.73 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1