ETC Request ID: STIS.sp.826455
Requested Signal/Noise Ratio = 10.000 at wavelength 1718.00 Å (per resolution element)
gives: Time = 547.4664 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 pix) | (2.0 pix resel x pix) | |
| Source | 0.114 | 125.11 | 11.19 |
| Background | 0.011 | 11.50 | 3.39 |
| Sky | 2.641e-11 | 2.89e-08 | 1.70e-04 |
| Dark Current | 0.011 | 11.50 | 3.39 |
| Total in selected region | 0.125 | 136.60 | 12.51 |
| Brightest Pixel (single exposure) (at 2319.51 Å) | 0.343 | 187.55 | |
| Count rate entire detector | 12,060.244 | ||
| Buffer Time (sec) | 165.83 | ||
| 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 | 8,257.784 | 4,520,859.118 | |
| Background (sky+dark) | 1,572.864 | 861,090.22 | |
| Encircled energy fraction | 0.92 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | NUVMAMA |
| Central Wavelength: | 1978 |
| Grating: | [E230M] R ~ 30000 |
| Aperture: | 0.2X0.2 |
| Target: [point source] | |
| Spectrum: | Castelli-Kurucz Models O7V 37000 4.0 |
| Extinction E(B-V): | LMC 30DorShell (Rv=2.76) = 0.56 applied before normalization |
| Normalization: | Renormalized to vegamag = 9.67 in filter Johnson/V |
| 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 24.2
