ETC Request ID: STIS.ta.826496

Requested Signal/Noise Ratio = 40.000

gives: Time = 3.3170 seconds

gives: Time to Saturation (for a single exposure) = 641.78 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 632.086 2,096.65 45.79
    Background 0.172 0.57 0.76
        Sky 0.001 3.56e-03 0.06
        Dark Current 0.171 0.57 0.75
    Read Out 25.50
Total in selected region 632.258 2,097.23 52.42
Brightest Pixel (single exposure) 186.979 620.22
Global Count Rates
    Source only 1,264.173 4,193.309
    Background (sky+dark) 19,991.367 66,312.13
Background per unit area
    Sky Background (arcsec-2) 0.048 0.158
    Dark Current (arcsec-2) 7.600 25.209
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 0.15
Effective Wavelength 8313.76 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OIII
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Kurucz Models K4V 4560 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 11.33 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2