ETC Request ID: STIS.ta.1007420

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.6410 seconds

gives: Time to Saturation (for a single exposure) = 97.98 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 3,226.902 2,068.41 45.48
    Background 0.597 0.38 0.62
        Sky 0.435 0.28 0.53
        Dark Current 0.162 0.10 0.32
    Read Out 24.60
Total in selected region 3,227.499 2,068.79 51.71
Brightest Pixel (single exposure) 1,224.748 785.05
Global Count Rates
    Source only 6,453.804 4,136.823
    Background (sky+dark) 46,585.728 29,860.98
Background per unit area
    Sky Background (arcsec-2) 19.330 12.390
    Dark Current (arcsec-2) 7.200 4.615
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 7173.30 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: Castelli-Kurucz Models G2V 5750 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 15.9 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2