ETC Request ID: STIS.sp.1010546

Exposure time (seconds) = 900.0000 at wavelength 1215.97 Å

gives: SNR = 19.3322 (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 0.209 375.61 19.38
    Background 0.001 1.89 1.37
        Sky 2.396e-08 4.31e-05 6.57e-03
        Dark Current 0.001 1.89 1.37
Total in selected region 0.210 377.50 19.43
Brightest Pixel (single exposure) (at 1215.95 Å) 0.069 62.26
Count rate entire detector 196.098
Buffer Time (sec) 10,198.96
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 0.789 709.664
    Background (sky+dark) 195.310 175,778.98
Encircled energy fraction 0.76

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1222
Grating: [G140M] R ~ 10000
Aperture: 52X0.1
Glow region: low


Target: [point source]
Spectrum: Empty
Extinction E(B-V): None
Normalization: None
Redshift: None
Emission Lines:
Line at Center 1215.97 Å    FWHM 0.12 Å   Flux 3.7e-14 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2