ETC Request ID: STIS.sp.1369383

Exposure time (seconds) = 10,000.0000 at wavelength 1216.00 Å

gives: SNR = 607.1183 (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 18.431 368,613.66 607.14
    Background 0.001 21.00 4.58
        Sky 2.731e-08 5.46e-04 0.02
        Dark Current 0.001 21.00 4.58
Total in selected region 18.432 368,634.66 607.15
Brightest Pixel (single exposure) (at 1216.00 Å) 6.096 60,960.38
Count rate entire detector 1,531.245
Buffer Time (sec) 1,306.13
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 1,298.095 12,980,953.252
    Background (sky+dark) 233.149 2,331,492.72
Encircled energy fraction 0.76

Instrument name: STIS
Mode: spectroscopic
Detector: FUVMAMA
Central Wavelength: 1222
Grating: [G140M] R ~ 10000
Aperture: 52X0.2
Glow region: low


Target: [point source]
Spectrum: Pickles Models K5III 4008.67K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 0.86 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 1216.0 Å    FWHM 2.5 Å   Flux 4.7e-11 Fλ


Selected background:
  Sky Background:
    Level:

Table of Source and Noise Counts per Pixel

Plots

These results were computed using: ETC version 27.2