ETC Request ID: STIS.sp.1368386
Requested Signal/Noise Ratio = 20.000 at wavelength 1807.00 Å (per resolution element)
gives: Time = 2,738.9150 seconds
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 | 0.093 | 509.31 | 22.57 |
| Background | 0.014 | 76.69 | 8.76 |
| Sky | 9.803e-12 | 5.37e-08 | 2.32e-04 |
| Dark Current | 0.014 | 76.69 | 8.76 |
| Total in selected region | 0.107 | 586.00 | 25.47 |
| Brightest Pixel (single exposure) (at 1887.41 Å) | 0.046 | 124.72 | |
| Count rate entire detector | 5,739.724 | ||
| Buffer Time (sec) | 348.45 | ||
| 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 | 2,323.076 | 6,362,707.226 | |
| Background (sky+dark) | 2,097.152 | 5,743,921.01 | |
| Encircled energy fraction | 0.92 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1763 |
| Grating: | [E230H] R ~ 114000 |
| Aperture: | 0.2X0.09 |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models A3V 8750 4.0 |
| Extinction E(B-V): | Milky Way Diffuse (Rv=3.1) = 0.03 applied before normalization |
| Normalization: | Renormalized to abmag = 11.9 in filter Galex/FUV |
| 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
