ETC Request ID: STIS.ta.1301336

Requested Signal/Noise Ratio = 40.000

gives: Time = 21.1085 seconds

gives: Time to Saturation (for a single exposure) = 2,681.98 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 99.004 2,089.83 45.71
    Background 0.225 4.75 2.18
        Sky 8.928e-06 1.88e-04 0.01
        Dark Current 0.225 4.75 2.18
    Read Out 25.20
Total in selected region 99.229 2,094.58 52.25
Brightest Pixel (single exposure) 44.743 944.46
Global Count Rates
    Source only 198.008 4,179.662
    Background (sky+dark) 26,214.648 553,352.70
Background per unit area
    Sky Background (arcsec-2) 3.968e-04 0.008
    Dark Current (arcsec-2) 10.000 211.085
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 0.23
Effective Wavelength 6046.75 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND5
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models B3V 19000 4.0
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.63 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.2