ETC Request ID: STIS.ta.1301370

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2956 seconds

gives: Time to Saturation (for a single exposure) = 33.60 seconds


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Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 7,059.612 2,086.92 45.68
    Background 0.227 0.07 0.26
        Sky 0.002 4.63e-04 0.02
        Dark Current 0.225 0.07 0.26
    Read Out 25.20
Total in selected region 7,059.838 2,086.99 52.17
Brightest Pixel (single exposure) 3,571.827 1,055.88
Global Count Rates
    Source only 14,119.224 4,173.846
    Background (sky+dark) 26,257.865 7,762.20
Background per unit area
    Sky Background (arcsec-2) 0.070 0.021
    Dark Current (arcsec-2) 10.000 2.956
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 0.25
Effective Wavelength 5007.98 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B0V 30000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 9.04 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2