ETC Request ID: STIS.ta.825088

Requested Signal/Noise Ratio = 40.000

gives: Time = 1.9600 seconds

gives: Time to Saturation (for a single exposure) = 198.37 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,069.658 2,096.51 45.79
    Background 0.172 0.34 0.58
        Sky 0.001 2.07e-03 0.05
        Dark Current 0.171 0.34 0.58
    Read Out 25.50
Total in selected region 1,069.830 2,096.85 52.41
Brightest Pixel (single exposure) 604.923 1,185.64
Global Count Rates
    Source only 2,139.316 4,193.021
    Background (sky+dark) 19,990.111 39,180.27
Background per unit area
    Sky Background (arcsec-2) 0.047 0.092
    Dark Current (arcsec-2) 7.600 14.896
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 0.28
Effective Wavelength 3726.87 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50OII
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: Non-stellar Objects Elliptical Galaxy [240, 34000 Å]
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.02 applied before normalization
Normalization: Renormalized to vegamag = 8.63 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2