ETC Request ID: STIS.sp.1371733
Exposure time (seconds) = 2,707.0000 at wavelength 1550.00 Å
gives: SNR = 14.4406 (per resolution element)
Table of Source and Noise Counts per Pixel
| 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 | 0.044 | 236.05 | 15.36 |
| Background | 0.001 | 5.68 | 2.38 |
| Sky | 3.260e-13 | 1.76e-09 | 4.20e-05 |
| Dark Current | 0.001 | 5.68 | 2.38 |
| Total in selected region | 0.045 | 241.73 | 16.35 |
| Brightest Pixel (single exposure) (at 1320.92 Å) | 0.055 | 149.94 | |
| Count rate entire detector | 5,589.118 | ||
| Buffer Time (sec) | 357.84 | ||
| 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. | |||
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| Global Count Rates | |||
| Source only | 3,272.106 | 8,857,591.431 | |
| Background (sky+dark) | 157.418 | 426,130.97 | |
| Encircled energy fraction | 0.95 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models O3V 45000 4.5 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.2 applied before normalization |
| Normalization: | Renormalized to vegamag = 12.8 in filter Johnson/V |
| Redshift: | None |
| Emission Lines: | None |
| Selected background: | |
| Sky Background: | |
| Level: |
Table of Source and Noise Counts per Pixel
These results were computed using: ETC version 27.2
