ETC Request ID: COS.im.1370090

Exposure time (seconds) = 20.0000

gives: SNR = 38.8504


Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (circle with radius 0.0434 arcsec)
    Source 75.477 1,509.55 38.85
    Background 0.010 0.19 0.44
        Sky 1.827e-05 3.65e-04 0.02
        Dark Current 0.010 0.19 0.44
Total in selected region 75.487 1,509.74 38.86
Brightest Pixel (single exposure) 13.096 261.92
Count rate entire detector 1,013.963
Buffer Fill Time (sec) 2,326
For APT purposes, the recommended buffer time is 2/3 of the buffer fill time calculated above. Please refer to Chapter 5.4 in the COS Instrument Handbook for more details.
Extraction region
circle with radius 0.0434 arcsec
    Effective Sky Area (pixels) 10.72
    Fraction of flux 0.80
    Fraction of flux in brightest pixel 0.14
Effective Wavelength 2234.84 Å

Instrument name: COS
Mode: imaging
Detector: NUV
Mirror: Mirror A
Aperture: Bright Object Aperture


Target: [point source]
Spectrum: Castelli-Kurucz Models O3V 45000 4.5
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.3 applied before normalization
Normalization: Renormalized to vegamag = 13.5 in filter Johnson/V
Redshift: None
Emission Lines: None


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 27.2