ETC Request ID: STIS.ta.821163

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.2334 seconds

gives: Time to Saturation (for a single exposure) = 9.90 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 50,173.889 11,709.71 108.21
    Background 19.457 4.54 2.13
        Sky 0.001 3.31e-04 0.02
        Dark Current 19.456 4.54 2.13
    Read Out 272.00
Total in selected region 50,193.346 11,714.25 292.74
Brightest Pixel (single exposure) 12,127.133 2,830.26
Global Count Rates
    Source only 53,139.814 12,401.900
    Background (sky+dark) 19,922.945 4,649.67
Background per unit area
    Sky Background (arcsec-2) 0.142 0.033
    Dark Current (arcsec-2) 7.600 1.774
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 4.00
    Fraction of flux 0.94
    Fraction of flux in brightest pixel 0.23
Effective Wavelength 5955.96 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.2X0.05ND
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: User uploaded spectrum: t5250feh250.dat
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.03 applied before normalization
Normalization: Renormalized to vegamag = 8.38 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2