ETC Request ID: STIS.ta.1301399

Requested Signal/Noise Ratio = 40.000

gives: Time = 3.4826 seconds

gives: Time to Saturation (for a single exposure) = 434.50 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 599.375 2,087.37 45.69
    Background 0.225 0.78 0.89
        Sky 8.928e-06 3.11e-05 5.58e-03
        Dark Current 0.225 0.78 0.89
    Read Out 25.20
Total in selected region 599.600 2,088.15 52.18
Brightest Pixel (single exposure) 276.179 961.81
Global Count Rates
    Source only 1,198.750 4,174.737
    Background (sky+dark) 26,214.648 91,294.47
Background per unit area
    Sky Background (arcsec-2) 3.968e-04 0.001
    Dark Current (arcsec-2) 10.000 34.826
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 0.23
Effective Wavelength 5873.39 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
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 = 5.7 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2