ETC Request ID: STIS.sp.826451
Requested Signal/Noise Ratio = 30.000 at wavelength 1450.00 Å (per resolution element)
gives: Time = 3,079.5487 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 | 0.169 | 1,039.88 | 32.25 |
| Background | 0.001 | 6.47 | 2.54 |
| Sky | 2.947e-14 | 1.82e-10 | 1.35e-05 |
| Dark Current | 0.001 | 6.47 | 2.54 |
| Total in selected region | 0.170 | 1,046.34 | 34.66 |
| Brightest Pixel (single exposure) (at 1435.96 Å) | 0.055 | 170.66 | |
| Count rate entire detector | 6,266.264 | ||
| Buffer Time (sec) | 319.17 | ||
| 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. | |||
|
|
|||
| Global Count Rates | |||
| Source only | 3,680.023 | 11,332,810.296 | |
| Background (sky+dark) | 157.420 | 484,783.48 | |
| Encircled energy fraction | 0.94 | ||
| Instrument name: | STIS |
| Mode: | spectroscopic |
| Detector: | FUVMAMA |
| Central Wavelength: | 1425 |
| Grating: | [E140M] R ~ 45800 |
| Aperture: | 0.2X0.2 |
| Glow region: | low |
| 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
