ETC Request ID: STIS.sp.620466

Exposure time (seconds) = 3,000.0000 at wavelength 1425.00 Å

gives: SNR = 13.4238 (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 pix) (2.0 pix resel x pix)
    Source 0.031 186.29 13.65
    Background 0.001 6.30 2.51
        Sky 2.928e-12 1.76e-08 1.33e-04
        Dark Current 0.001 6.30 2.51
Total in selected region 0.032 192.59 13.88
Brightest Pixel (single exposure) (at 1350.30 Å) 0.012 35.23
Count rate entire detector 291.852
Buffer Time (sec)
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 18.526 55,579.281
    Background (sky+dark) 273.326 819,977.84
Encircled energy fraction 0.83

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength:
Grating: [G140L] R ~ 1000
Aperture: 52X0.2
Glow region:


Target: [point source]
Spectrum: User uploaded spectrum: 98s_100mpc.txt
Extinction E(B-V): Milky Way Diffuse (Rv=3.1) = 0.11 applied before normalization
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 22.2