ETC Request ID: STIS.sp.1009030

Exposure time (seconds) = 2,700.0000 at wavelength 1216.00 Å

gives: SNR = 8.6888 (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 0.021 112.16 10.59
    Background 0.001 5.67 2.38
        Sky 8.103e-14 4.38e-10 2.09e-05
        Dark Current 0.001 5.67 2.38
Total in selected region 0.022 117.83 12.91
Brightest Pixel (single exposure) (at 1215.72 Å) 0.008 21.33
Count rate entire detector 160.211
Buffer Time (sec) 12,483.57
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 1.682 4,541.238
    Background (sky+dark) 157.419 425,029.97
Encircled energy fraction 0.88

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: Pickles Models M4V 3111.72K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 7.63 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 1216.0 Å    FWHM 0.9 Å   Flux 3.4e-13 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 25.2