ETC Request ID: STIS.ta.1364725

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.2463 seconds

gives: Time to Saturation (for a single exposure) = 258.11 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,674.548 2,087.06 45.68
    Background 0.235 0.29 0.54
        Sky 0.001 1.36e-03 0.04
        Dark Current 0.234 0.29 0.54
    Read Out 25.20
Total in selected region 1,674.783 2,087.36 52.18
Brightest Pixel (single exposure) 464.914 579.44
Global Count Rates
    Source only 3,349.096 4,174.127
    Background (sky+dark) 27,332.328 34,065.50
Background per unit area
    Sky Background (arcsec-2) 0.048 0.060
    Dark Current (arcsec-2) 10.400 12.962
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 0.14
Effective Wavelength 8553.42 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 F5I 7000 1.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.769 applied before normalization
Normalization: Renormalized to vegamag = 10.56 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2