ETC Request ID: STIS.sp.1032629
Exposure time (seconds) = 13,600.0000 at wavelength 2906.00 Å
gives: SNR = 7.4871 (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 | 0.006 | 157.66 | 12.56 |
| Background | 0.011 | 285.75 | 16.90 |
| Sky | 5.518e-06 | 0.15 | 0.39 |
| Dark Current | 0.011 | 285.60 | 16.90 |
| Total in selected region | 0.016 | 443.41 | 21.06 |
| Brightest Pixel (single exposure) (at 2905.60 Å) | 0.004 | 52.25 | |
| Count rate entire detector | 1,574.745 | ||
| Buffer Time (sec) | 1,270.05 | ||
| 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 | 0.139 | 1,887.649 | |
| Background (sky+dark) | 1,574.606 | 21,414,647.35 | |
| Encircled energy fraction | 0.87 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | |
| Grating: | [G230L] R ~ 500 |
| Aperture: | 52X0.2 |
| Target: [point source] | |
| Spectrum: | User uploaded spectrum: spec_MgII.dat |
| Extinction E(B-V): | None |
| Normalization: | Renormalized to abmag = 24.3 in filter WFC3/UVIS1/F275W |
| Redshift: | z=0.038 |
| 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
