ETC Request ID: STIS.ta.1013603

Requested Signal/Noise Ratio = 40.000

gives: Time = 0.0150 seconds

gives: Time to Saturation (for a single exposure) = 0.77 seconds

Exposure time calculation HAD WARNINGS.

WARNING MESSAGE: Result of the calculation 0.014994 is less than the minimum exposure time for this detector (0.1)


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 32 x 32 pixels)
    Source 755,397.727 11,326.46 106.43
    Background 18.515 0.28 0.53
        Sky 0.083 1.25e-03 0.04
        Dark Current 18.432 0.28 0.53
    Read Out 262.40
Total in selected region 755,416.242 11,326.74 283.16
Brightest Pixel (single exposure) 156,266.185 2,343.06
Global Count Rates
    Source only 820,764.843 12,306.582
    Background (sky+dark) 18,874.451 283.00
Background per unit area
    Sky Background (arcsec-2) 33.243 0.498
    Dark Current (arcsec-2) 7.200 0.108
Extraction region
box of 32 x 32 pixels
    Effective Sky Area (pixels) 1.00
    Fraction of flux 0.92
    Fraction of flux in brightest pixel 0.19
Effective Wavelength 7155.81 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ/PEAK
Aperture: 0.1X0.03
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Castelli-Kurucz Models M2V 3500 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 12.497 in filter Johnson/U
Redshift: None
Emission Lines:
Line at Center 1215.14 Å    FWHM 0.5 Å   Flux 2.1e-12 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 25.2