ETC Request ID: STIS.ta.1301984

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.1740 seconds

gives: Time to Saturation (for a single exposure) = 6.63 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 66,561.378 11,582.05 107.62
    Background 25.600 4.45 2.11
        Sky 2.326e-04 4.05e-05 6.36e-03
        Dark Current 25.600 4.45 2.11
    Read Out 268.80
Total in selected region 66,586.978 11,586.51 289.55
Brightest Pixel (single exposure) 18,088.488 3,147.50
Global Count Rates
    Source only 70,059.037 12,190.664
    Background (sky+dark) 26,214.400 4,561.45
Background per unit area
    Sky Background (arcsec-2) 0.016 0.003
    Dark Current (arcsec-2) 10.000 1.740
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 = 5.9 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2