ETC Request ID: STIS.ta.822657

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0099 seconds

gives: Time to Saturation (for a single exposure) = 1.57 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.00985824 is less than the minimum exposure time for this detector (0.1)

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 212,645.015 2,096.31 45.79
    Background 0.608 5.99e-03 0.08
        Sky 0.437 4.31e-03 0.07
        Dark Current 0.171 1.69e-03 0.04
    Read Out 25.50
Total in selected region 212,645.623 2,096.31 52.41
Brightest Pixel (single exposure) 76,418.141 753.35
Global Count Rates
    Source only 425,290.030 4,192.612
    Background (sky+dark) 47,758.524 470.82
Background per unit area
    Sky Background (arcsec-2) 19.417 0.191
    Dark Current (arcsec-2) 7.600 0.075
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 0.18
Effective Wavelength 7453.21 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: dim.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