ETC Request ID: STIS.sp.1040058

Exposure time (seconds) = 1,821.0000 at wavelength 2796.25 Å

gives: SNR = 11.1559 (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 0.043 157.95 12.57
    Background 0.011 38.24 6.18
        Sky 1.037e-09 3.78e-06 1.94e-03
        Dark Current 0.011 38.24 6.18
Total in selected region 0.054 196.19 14.16
Brightest Pixel (single exposure) (at 2796.00 Å) 0.033 60.46
Count rate entire detector 1,580.932
Buffer Time (sec) 1,265.08
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 6.901 12,567.316
    Background (sky+dark) 1,572.864 2,864,185.45
Encircled energy fraction 0.93

Instrument name: STIS
Mode: spectroscopic
Detector: NUVMAMA
Central Wavelength: 2713
Grating: [E230H] R ~ 114000
Aperture: 0.2X0.09


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 2796.0 Å    FWHM 0.5 Å   Flux 2.04e-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