Observation Summary
| OBSID: | 1342231298 |
| Instrument: | PACS |
| AOR label: | NGC_2440_B2A_off2 |
| Proposal: | OT1_rrubin_1 |
| Target: | NGC 2440 Off |
| Actual RA: | 7h 41m 54.76s |
| Actual Dec.: | -18° 14' 28.87'' |
| Purpose: | offSelector |
| Concat.: | 1342231297,1342231298 |
| OD: | 890 |
| Start: | 2011-10-21T01:21:26.000000 TAI (1697851286000000) |
| Duration: | 1001.0 seconds (incl. spacecraft on-target slew time) |
AOT and instrument configuration:
| AOT: | PacsRangeSpec |
| Mode: | Pointed, unchopped grating scan |
| Bands: | B2A R1 (prime diffraction orders selected) |
| Sampling: | Nyquist (with spectral dithering if range repetition > 1) |
| Nod cycles: | 3 |
System configuration summary
| SPG pipeline version: | SPG v14.2.0 |
| SPG pipeline products creation date: | 2016-07-26T05:25:30.935000 TAI (1848201930935000) |
| Mission configuration: | MC_H90ASTR_P67ASTR_S63ASTR_RP |
| Processed to level: | RED: 2.0 BLUE: 2.0 |
| Quality Control: | PASSED |
| Action: | NONE |
Quality comments
Off source observation in an unchopped range-scan pair; matched with the on-source observation 1342231297
The offset between the central spaxel and the requested sky coordinates is 2.28" in the dispersion direction.
If the target is point-like and is offset from the centre of a spaxel in the dispersion direction, the spectral line
profiles will develop a skew. This skewed Gaussian profile becomes more extreme as the offset increases.
Be aware that this can be confused with real velocity structure.
This will affect spectra from a single spaxel of a rebinned cube (products with filenames "..hps3dr[r|b].."),
and combined spaxel-spectra, i.e. added rebinned cube spaxels, or single spaxels from an interpolated or projected cube
(products with filenames "..hps3di[r|b].." or "..hps3dp[r|b].."). See the "PACS Handbook" for more information.