ETC Request ID: STIS.sp.1003064
Exposure time (seconds) = 2,439.0000 at wavelength 1549.00 Å
gives: SNR = 4.3233 (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 | 0.005 | 22.88 | 4.78 |
| Background | 0.001 | 5.12 | 2.26 |
| Sky | 5.136e-11 | 2.51e-07 | 5.01e-04 |
| Dark Current | 0.001 | 5.12 | 2.26 |
| Total in selected region | 0.006 | 28.00 | 5.29 |
| Brightest Pixel (single exposure) (at 1215.30 Å) | 0.088 | 214.38 | |
| Count rate entire detector | 271.442 | ||
| Buffer Time (sec) | 7,368.05 | ||
| 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 | 1.004 | 2,448.732 | |
| Background (sky+dark) | 270.438 | 659,599.08 | |
| Encircled energy fraction | 0.84 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | |
| Grating: | [G140L] R ~ 1000 |
| Aperture: | 52X0.2 |
| Glow region: | low |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: G249-11_scaled.dat |
| Extinction E(B-V): | None |
| Normalization: | None |
| 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
