ETC Request ID: STIS.sp.1368213
Exposure time (seconds) = 2,600.0000 at wavelength 1425.00 Å
gives: SNR = 9.7648 (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 | 0.022 | 115.22 | 10.73 |
| Background | 0.001 | 5.46 | 2.34 |
| Sky | 2.171e-14 | 1.13e-10 | 1.06e-05 |
| Dark Current | 0.001 | 5.46 | 2.34 |
| Total in selected region | 0.023 | 120.68 | 11.80 |
| Brightest Pixel (single exposure) (at 1297.42 Å) | 0.011 | 28.12 | |
| Count rate entire detector | 1,167.397 | ||
| Buffer Time (sec) | 1,713.21 | ||
| 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 | 608.420 | 1,581,892.795 | |
| Background (sky+dark) | 157.418 | 409,287.23 | |
| Encircled energy fraction | 0.94 | ||
| 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): | SMC Bar (Rv=2.74) = 0.04 applied before normalization |
| Normalization: | Renormalized to vegamag = 13.93 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 27.2
