ETC Request ID: STIS.sp.1365718

Exposure time (seconds) = 1,000.0000 at wavelength 1307.00 Å

gives: SNR = 0.1973 (per resolution element)


Table of Source and Noise Counts per Pixel

Plots

Detailed Information Count rate Total counts Associated noise
(counts/s) (counts) (counts)
Counts (box 7 pixels high) (1 pix x 7 pix) (2 pix resel x 7 pix)
    Source 1.550e-04 0.31 0.56
    Background 0.001 2.10 1.45
        Sky 1.695e-15 3.39e-12 1.84e-06
        Dark Current 0.001 2.10 1.45
Total in selected region 0.001 2.41 1.57
Brightest Pixel (single exposure) (at 1403.90 Å) 0.151 150.89
Count rate entire detector 213.045
Buffer Time (sec) 9,387.70
For APT purposes, the recommended buffer time should be 4/5 of the buffer time calculated above. Please refer to the STIS Instrument Handbook for more details.
Global Count Rates
    Source only 31.638 31,637.531
    Background (sky+dark) 157.363 157,362.69
Encircled energy fraction 0.92

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1307
Grating: [E140H] R ~ 114000
Aperture: 0.2X0.09
Glow region: low


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


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 27.2