ETC Request ID: STIS.ta.1301932

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.3146 seconds

gives: Time to Saturation (for a single exposure) = 11.79 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 36,820.709 11,582.32 107.62
    Background 25.600 8.05 2.84
        Sky 2.326e-04 7.32e-05 8.55e-03
        Dark Current 25.600 8.05 2.84
    Read Out 268.80
Total in selected region 36,846.309 11,590.37 289.56
Brightest Pixel (single exposure) 10,179.112 3,201.94
Global Count Rates
    Source only 38,673.918 12,165.264
    Background (sky+dark) 26,214.400 8,246.00
Background per unit area
    Sky Background (arcsec-2) 0.016 0.005
    Dark Current (arcsec-2) 10.000 3.146
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 4576.10 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 B1V 25000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 6.66 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2