ETC Request ID: STIS.ta.1365708

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2052 seconds

gives: Time to Saturation (for a single exposure) = 27.88 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 10,169.487 2,086.91 45.68
    Background 0.235 0.05 0.22
        Sky 0.001 2.23e-04 0.01
        Dark Current 0.234 0.05 0.22
    Read Out 25.20
Total in selected region 10,169.722 2,086.96 52.17
Brightest Pixel (single exposure) 4,303.461 883.13
Global Count Rates
    Source only 20,338.974 4,173.823
    Background (sky+dark) 27,332.328 5,608.95
Background per unit area
    Sky Background (arcsec-2) 0.048 0.010
    Dark Current (arcsec-2) 10.400 2.134
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 6567.07 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Kurucz Models B1V 25400 3.9
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.63 applied before normalization
Normalization: Renormalized to vegamag = 8.19 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2