ETC Request ID: STIS.ta.1301365

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.5503 seconds

gives: Time to Saturation (for a single exposure) = 20.98 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 21,048.556 11,582.77 107.62
    Background 25.600 14.09 3.75
        Sky 2.326e-04 1.28e-04 0.01
        Dark Current 25.600 14.09 3.75
    Read Out 268.80
Total in selected region 21,074.156 11,596.85 289.57
Brightest Pixel (single exposure) 5,720.099 3,147.70
Global Count Rates
    Source only 22,154.613 12,191.416
    Background (sky+dark) 26,214.400 14,425.47
Background per unit area
    Sky Background (arcsec-2) 0.016 0.009
    Dark Current (arcsec-2) 10.000 5.503
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 6.00
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.26
Effective Wavelength 4787.86 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.3X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B3V 19000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.15 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2