ETC Request ID: STIS.ta.1326572

Exposure time (seconds) = 1.0000

gives: SNR = 319.8565

gives: Time to Saturation (for a single exposure) = 2.97 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 102,939.532 102,939.53 320.84
    Background 0.235 0.24 0.48
        Sky 0.001 1.09e-03 0.03
        Dark Current 0.234 0.23 0.48
    Read Out 25.20
Total in selected region 102,939.767 102,939.77 321.83
Brightest Pixel (single exposure) 40,451.696 40,451.70
Global Count Rates
    Source only 205,879.064 205,879.064
    Background (sky+dark) 27,332.314 27,332.31
Background per unit area
    Sky Background (arcsec-2) 0.048 0.048
    Dark Current (arcsec-2) 10.400 10.400
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 0.20
Effective Wavelength 6986.59 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: Castelli-Kurucz Models G2V 5750 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 5.67 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1