ETC Request ID: STIS.sp.1009027

Exposure time (seconds) = 1,800.0000 at wavelength 2795.50 Å

gives: SNR = 34.3828 (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 0.347 1,249.95 35.35
    Background 0.011 37.80 6.15
        Sky 1.040e-09 3.74e-06 1.94e-03
        Dark Current 0.011 37.80 6.15
Total in selected region 0.358 1,287.75 36.35
Brightest Pixel (single exposure) (at 2795.50 Å) 0.132 236.90
Count rate entire detector 1,591.079
Buffer Time (sec) 1,257.01
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 15.582 28,047.575
    Background (sky+dark) 1,572.864 2,831,155.30
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: Pickles Models M4V 3111.72K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 10.69 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 2795.5 Å    FWHM 0.3 Å   Flux 5.1e-13 Fλ
Line at Center 2802.7 Å    FWHM 0.3 Å   Flux 3.6e-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