ETC Request ID: STIS.ta.1406440

Requested Signal/Noise Ratio = 40.000

gives: Time = 24.0131 seconds

gives: Time to Saturation (for a single exposure) = 3,448.29 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 88.497 2,125.10 46.10
    Background 0.675 16.22 4.03
        Sky 0.432 10.38 3.22
        Dark Current 0.243 5.84 2.42
    Read Out 26.10
Total in selected region 89.173 2,141.32 53.13
Brightest Pixel (single exposure) 34.800 835.65
Global Count Rates
    Source only 176.995 4,250.198
    Background (sky+dark) 55,864.519 1,341,480.47
Background per unit area
    Sky Background (arcsec-2) 19.219 461.518
    Dark Current (arcsec-2) 10.800 259.342
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 6994.69 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: Black body at 10000.0K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.04 applied after normalization
Normalization: Renormalized to vegamag = 19.0 in filter WFC3/UVIS1/F218W
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 28.1