ETC Request ID: STIS.ta.1348312

Requested Signal/Noise Ratio = 40.000

gives: Time = 16.3793 seconds

gives: Time to Saturation (for a single exposure) = 1,661.62 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 127.556 2,089.27 45.71
    Background 0.235 3.85 1.96
        Sky 0.001 0.02 0.13
        Dark Current 0.234 3.83 1.96
    Read Out 25.20
Total in selected region 127.791 2,093.12 52.23
Brightest Pixel (single exposure) 72.219 1,182.89
Global Count Rates
    Source only 255.111 4,178.545
    Background (sky+dark) 27,329.489 447,637.87
Background per unit area
    Sky Background (arcsec-2) 0.046 0.760
    Dark Current (arcsec-2) 10.400 170.345
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 0.28
Effective Wavelength 3739.19 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models K5V 4250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.47 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1