ETC Request ID: STIS.sp.1367858
Exposure time (seconds) = 2,500.0000 at wavelength 2500.00 Å
gives: SNR = 164.6128 (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 | 5.435 | 27,173.60 | 164.84 |
| Background | 0.015 | 76.44 | 8.74 |
| Sky | 0.001 | 6.44 | 2.54 |
| Dark Current | 0.014 | 70.00 | 8.37 |
| Total in selected region | 5.450 | 27,250.04 | 165.08 |
| Brightest Pixel (single exposure) (at 2155.20 Å) | 2.947 | 7,367.08 | |
| Count rate entire detector | 4,951.587 | ||
| Buffer Time (sec) | 403.91 | ||
| 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 | 2,837.274 | 7,093,185.392 | |
| Background (sky+dark) | 2,114.313 | 5,285,783.00 | |
| Encircled energy fraction | 0.86 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: J1825.etc |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to abmag = 14.6 in filter Galex/NUV |
| 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
