ETC Request ID: STIS.ta.823133

Requested Signal/Noise Ratio = 100.000

gives: Time = 7.8418 seconds

gives: Time to Saturation (for a single exposure) = 200.87 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Partial overlap between instrument throughput band and target spectrum. Please doublecheck the wavelength range covered by the selected spectrum, and the instrument documentation for the selected filter.


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 1,353.887 10,616.95 103.04
    Background 0.608 4.77 2.18
        Sky 0.437 3.43 1.85
        Dark Current 0.171 1.34 1.16
    Read Out 25.50
Total in selected region 1,354.495 10,621.72 106.17
Brightest Pixel (single exposure) 597.407 4,684.76
Global Count Rates
    Source only 2,707.774 21,233.907
    Background (sky+dark) 47,758.524 374,514.28
Background per unit area
    Sky Background (arcsec-2) 19.417 152.261
    Dark Current (arcsec-2) 7.600 59.598
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 0.22
Effective Wavelength 6247.27 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F28X50LP
Gain: 4.0
# Frames: 1
Binning: 1
Dark:


Target: [point source]
Spectrum: User uploaded spectrum: Mrk493_forETC_daeseong.dat
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 24.2