ETC Request ID: STIS.sp.1012304

Requested Signal/Noise Ratio = 10.000 at wavelength 1393.80 Å (per resolution element)

gives: Time = 4,756.0812 seconds


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 0.013 125.56 11.21
    Background 0.001 9.99 3.16
        Sky 1.723e-14 1.64e-10 1.28e-05
        Dark Current 0.001 9.99 3.16
Total in selected region 0.014 135.55 12.56
Brightest Pixel (single exposure) (at 1215.97 Å) 0.139 661.21
Count rate entire detector 159.505
Buffer Time (sec) 12,538.81
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 1.257 5,977.456
    Background (sky+dark) 157.419 748,695.20
Encircled energy fraction 0.94

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1425
Grating: [E140M] R ~ 45800
Aperture: 0.2X0.2
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 0.03 Å   Flux 2.36e-13 Fλ
Line at Center 1393.8 Å    FWHM 0.03 Å   Flux 3.2e-15 Fλ
Line at Center 1548.2 Å    FWHM 3.0 Å   Flux 1.15e-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