ETC Request ID: STIS.ta.1362307

Requested Signal/Noise Ratio = 18.000

gives: Time = 9.1249 seconds

gives: Time to Saturation (for a single exposure) = 870.42 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 549.200 5,011.42 70.79
    Background 27.220 248.38 15.76
        Sky 0.596 5.44 2.33
        Dark Current 26.624 242.94 15.59
    Read Out 268.80
Total in selected region 576.420 5,259.80 278.41
Brightest Pixel (single exposure) 137.865 1,258.01
Global Count Rates
    Source only 580.816 5,299.913
    Background (sky+dark) 27,263.572 248,778.51
Background per unit area
    Sky Background (arcsec-2) 33.127 302.279
    Dark Current (arcsec-2) 10.400 94.899
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 7.20
    Fraction of flux 0.95
    Fraction of flux in brightest pixel 0.24
Effective Wavelength 5612.74 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.09
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models B0I 26001.6K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.5 applied before normalization
Normalization: Renormalized to vegamag = 18.7 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1