ETC Request ID: STIS.ta.826464

Requested Signal/Noise Ratio = 100.000

gives: Time = 4.3868 seconds

gives: Time to Saturation (for a single exposure) = 111.63 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 2,419.406 10,613.38 103.02
    Background 0.173 0.76 0.87
        Sky 0.002 6.89e-03 0.08
        Dark Current 0.171 0.75 0.87
    Read Out 25.50
Total in selected region 2,419.579 10,614.14 106.13
Brightest Pixel (single exposure) 1,074.977 4,715.68
Global Count Rates
    Source only 4,838.813 21,226.766
    Background (sky+dark) 19,966.577 87,588.81
Background per unit area
    Sky Background (arcsec-2) 0.070 0.306
    Dark Current (arcsec-2) 7.600 33.339
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 0.22
Effective Wavelength 6187.88 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Castelli-Kurucz Models O7V 37000 4.0
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.56 applied before normalization
Normalization: Renormalized to vegamag = 10.09 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2