ETC Request ID: STIS.ta.1045275

Requested Signal/Noise Ratio = 100.000

gives: Time = 2.0443 seconds

gives: Time to Saturation (for a single exposure) = 61.23 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 5,172.234 10,573.49 102.83
    Background 0.597 1.22 1.10
        Sky 0.435 0.89 0.94
        Dark Current 0.162 0.33 0.58
    Read Out 24.60
Total in selected region 5,172.831 10,574.71 105.73
Brightest Pixel (single exposure) 1,959.796 4,006.37
Global Count Rates
    Source only 10,344.469 21,146.982
    Background (sky+dark) 46,585.728 95,234.23
Background per unit area
    Sky Background (arcsec-2) 19.330 39.516
    Dark Current (arcsec-2) 7.200 14.719
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 7182.02 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: Non-stellar Objects QSO (IRTF based) [5801, 35095.4 Å z=0]
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.1 applied before normalization
Normalization: Renormalized to vegamag = 15.5 in filter Johnson/V
Redshift: z=0.018
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2