ETC Request ID: STIS.sp.1009017

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

gives: SNR = 27.9102 (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 0.232 835.33 28.90
    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 0.243 873.13 29.93
Brightest Pixel (single exposure) (at 2795.50 Å) 0.088 159.21
Count rate entire detector 1,604.574
Buffer Time (sec) 1,246.44
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 27.126 48,826.998
    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: Bruzual Synthetic Stellar Spectra M2 V
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 9.8 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 2795.5 Å    FWHM 0.3 Å   Flux 3.4e-13 Fλ
Line at Center 2802.7 Å    FWHM 0.3 Å   Flux 2.4e-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