ETC Request ID: STIS.sp.1005860
Exposure time (seconds) = 900.0000 at wavelength 1543.00 Å
gives: SNR = 21.1079 (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 | 0.249 | 447.43 | 21.15 |
| Background | 0.001 | 1.89 | 1.37 |
| Sky | 2.882e-12 | 5.19e-09 | 7.20e-05 |
| Dark Current | 0.001 | 1.89 | 1.37 |
| Total in selected region | 0.250 | 449.32 | 21.20 |
| Brightest Pixel (single exposure) (at 1554.95 Å) | 0.079 | 71.28 | |
| Count rate entire detector | 422.104 | ||
| Buffer Time (sec) | 4,738.17 | ||
| 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 | 264.817 | 238,335.423 | |
| Background (sky+dark) | 157.286 | 141,557.76 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1540 |
| Grating: | [G140M] R ~ 10000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models F0V 7250 4.0 |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to vegamag = 2.77 in filter Johnson/U |
| 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 25.2
