ETC Request ID: STIS.ta.1362314

Requested Signal/Noise Ratio = 40.000

gives: Time = 9.2909 seconds

gives: Time to Saturation (for a single exposure) = 1,391.57 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 225.030 2,090.73 45.72
    Background 0.667 6.20 2.49
        Sky 0.433 4.03 2.01
        Dark Current 0.234 2.17 1.47
    Read Out 25.20
Total in selected region 225.697 2,096.93 52.27
Brightest Pixel (single exposure) 86.234 801.19
Global Count Rates
    Source only 450.060 4,181.460
    Background (sky+dark) 54,873.474 509,823.74
Background per unit area
    Sky Background (arcsec-2) 19.260 178.939
    Dark Current (arcsec-2) 10.400 96.625
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 7126.66 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: Pickles Models B0I 26001.6K
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.55 applied before normalization
Normalization: Renormalized to vegamag = 18.6 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1