Observation Summary
| OBSID: | 1342248675 |
| Instrument: | PACS |
| AOR label: | PSpecR-Per-emb21-B2B |
| Proposal: | GT1_rvavrek_1 |
| Target: | Per-emb21 |
| Actual RA: | 3h 29m 10.5s |
| Actual Dec.: | 31° 18' 20.66'' |
| Purpose: | offSelector |
| Concat.: | 1342248672,1342248673,1342248674,1342248675,1342248676,1342248677 |
| OD: | 1172 |
| Start: | 2012-07-29T05:14:17.000000 TAI (1722230057000000) |
| Duration: | 2652.0 seconds (incl. spacecraft on-target slew time) |
AOT and instrument configuration:
| AOT: | PacsRangeSpec |
| Mode: | Pointed, unchopped grating scan |
| Bands: | B2B R1 (prime diffraction orders selected) |
| Sampling: | Nyquist (with spectral dithering if range repetition > 1) |
| Nod cycles: | 1 |
Observation block summary
| Name(*) | Camera | ID | Band(*) | ReqWaveMin(*) | ReqWaveMax(*) | WaveMin | WaveMax | Repetitions(*) | ActualRep | Capacitance | OutOfBand | Channel |
| | | | micrometer | micrometer | micrometer | micrometer | | | pF | | |
SED B2B | red | 102 | R1 | 140.000 | 220.000 | 139.585 | 210.285 | 4 | 2 | 0.14 | No | prime |
- | blue | 2 | B2B | - | - | 69.810 | 105.189 | 4 | 2 | 0.14 | Yes, partly | parallel |
(*) = requested in HSPOT
System configuration summary
| SPG pipeline version: | SPG v14.2.2 |
| SPG pipeline products creation date: | 2017-01-18T08:39:11.794000 TAI (1863419951794000) |
| Mission configuration: | MC_H100ASTR_P70ASTR_S66ASTR_RP |
| Processed to level: | RED: 2.5 BLUE: 2.5 |
| Quality Control: | PASSED |
| Action: | NONE |
Quality comments
Normally, for this observation the background spectrum is subtracted using its related off-source observation, and the results placed in Level 2.5. However, due to an oversight this was not done in SP 14.0. You can use a Useful script in HIPE to do this instead. The problem will be fixed in the 14.2 SPG products.
On source observation in an unchopped range-scan pair; matched with the off-source observation 1342248673
The offset between the central spaxel and the requested sky coordinates is 2.39" 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.