ETC Request ID: STIS.ta.1364699

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.6738 seconds

gives: Time to Saturation (for a single exposure) = 394.78 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,246.917 2,087.13 45.69
    Background 0.235 0.39 0.63
        Sky 0.001 1.82e-03 0.04
        Dark Current 0.234 0.39 0.63
    Read Out 25.20
Total in selected region 1,247.152 2,087.52 52.18
Brightest Pixel (single exposure) 303.968 508.79
Global Count Rates
    Source only 2,493.833 4,174.252
    Background (sky+dark) 27,332.328 45,749.67
Background per unit area
    Sky Background (arcsec-2) 0.048 0.081
    Dark Current (arcsec-2) 10.400 17.408
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 0.12
Effective Wavelength 8966.41 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 G0I 5500 1.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.558 applied before normalization
Normalization: Renormalized to vegamag = 10.944 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2