Observation Summary

OBSID:1342215660
Instrument:PACS
AOR label:Bright 1 - OFFPOS 1 - HOPS 085 - dither 3
Proposal:KPOT_tmegeath_2
Target:OFFPOS 1
Actual RA:5h 32m 18.93s
Actual Dec.:-6° 24' 26.52''
Purpose:Undefined
Concat.:---
OD:664
Start:2011-03-09T03:37:03.000000 TAI (1678333023000000)
Duration:989.0 seconds (incl. spacecraft on-target slew time)

AOT and instrument configuration:

AOT:PacsRangeSpec
Mode:Pointed, unchopped grating scan
Bands:B3A R1 (prime diffraction orders selected)
Sampling:Nyquist (with spectral dithering if range repetition > 1)
Nod cycles:1

Observation block summary

Name(*)CameraIDBand(*)ReqWaveMin(*)ReqWaveMax(*)WaveMinWaveMaxRepetitions(*)ActualRepCapacitanceOutOfBandChannel
micrometermicrometermicrometermicrometerpF
Range 1blue2B3A57.00071.00056.82971.067220.14Noprime
-red102R1--170.443213.155220.14Noparallel
(*) = requested in HSPOT

System configuration summary

SPG pipeline version:SPG v14.2.0
SPG pipeline products creation date:2016-07-24T23:06:53.861000 TAI (1848092813861000)
Mission configuration:MC_H66ASTR_P60ASTR_S61ASTR_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 1342215659
The offset between the central spaxel and the requested sky coordinates is  2.79" 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.