ETC Request ID: STIS.sp.1040055

Exposure time (seconds) = 1,846.0000 at wavelength 1215.00 Å

gives: SNR = 38.0752 (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 0.394 1,453.59 38.13
    Background 0.001 3.88 1.97
        Sky 7.172e-13 2.65e-09 5.15e-05
        Dark Current 0.001 3.88 1.97
Total in selected region 0.395 1,457.46 38.18
Brightest Pixel (single exposure) (at 1215.00 Å) 0.130 240.89
Count rate entire detector 202.541
Buffer Time (sec) 9,874.54
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 7.231 13,348.612
    Background (sky+dark) 195.310 360,542.23
Encircled energy fraction 0.75

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


Target: [point source]
Spectrum: Castelli-Kurucz Models K5V 4250 4.5
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.1 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 1215.0 Å    FWHM 0.65 Å   Flux 3.44e-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