ETC Request ID: STIS.ta.1362315

Requested Signal/Noise Ratio = 40.000

gives: Time = 8.6619 seconds

gives: Time to Saturation (for a single exposure) = 1,277.64 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 241.342 2,090.47 45.72
    Background 0.667 5.78 2.40
        Sky 0.433 3.75 1.94
        Dark Current 0.234 2.03 1.42
    Read Out 25.20
Total in selected region 242.009 2,096.25 52.26
Brightest Pixel (single exposure) 93.923 813.55
Global Count Rates
    Source only 482.683 4,180.940
    Background (sky+dark) 54,873.474 475,306.69
Background per unit area
    Sky Background (arcsec-2) 19.260 166.824
    Dark Current (arcsec-2) 10.400 90.083
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 7043.56 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) = 0.4 applied before normalization
Normalization: Renormalized to vegamag = 18.4 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.1