ETC Request ID: STIS.ta.1362318

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.9133 seconds

gives: Time to Saturation (for a single exposure) = 135.70 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 2,285.440 2,087.26 45.69
    Background 0.667 0.61 0.78
        Sky 0.433 0.40 0.63
        Dark Current 0.234 0.21 0.46
    Read Out 25.20
Total in selected region 2,286.107 2,087.87 52.18
Brightest Pixel (single exposure) 884.298 807.62
Global Count Rates
    Source only 4,570.880 4,174.521
    Background (sky+dark) 54,873.474 50,115.18
Background per unit area
    Sky Background (arcsec-2) 19.260 17.589
    Dark Current (arcsec-2) 10.400 9.498
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 0.19
Effective Wavelength 7070.91 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models B0I 26001.6K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.45 applied before normalization
Normalization: Renormalized to vegamag = 16.0 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Earth Shine: Average
    Zodiacal Light: Average
    Air Glow: Average

Plots

These results were computed using: ETC version 27.1