README web version of /home/usg/OPS/MTS/readme_xml/readme_76029600

Principal Investigator Email Address

• jaffe@strw.leidenuniv.nl

Estimated Total Execution Time (hours, including overheads)

• 1

General Description

• We want two SOFI spectra (H-and J-band) of line emission from a linear
   string of knots in the Helix Planetary Nebula, headed by a knot known as Knot 38.
    The finding chart, a 10-sec SOFI image taken with the NB_H2_S1 filter shows knot
   38 and the linear feature extending to the left (North-East) and the desired position
   of the slit.  We have specified a 200s acq. image with the same filter, so the feature
   should be clear.  In the initial ON position on the slit, the knot should be positioned
   about 3/4 down the slit, toward the Southern end. PA of slit on sky is 41deg;equals
   Rotation Offset on sky? Because there is emission everywhere in the nebula (see
   finding chart) the OFF position in the nodding along the slit must be at least 7'
   from the ON position.  We have specified 420" as the nod length and combined offset=T.
    If guiding is not possible with this throw length then the observation should be
   done with tracking only. In the K-band spectra we are interested in the ratio of
   the 1-0S0,1 and 2 lines at 2.22,2.12 and 2.03 mu and 2-1S3 at 2.07 mu, and Pa-Beta:1.28mu
   in the J-band (Pa-alpha in in a sky absorption hole and Br-gamma is very weak  in
   this source. cf. 76.C-0296(B)

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• none

Special Execution Requirements

• none

Special Calibration Information

• none

ToO Information

• none

ToO Activators List

• n.a.

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• none

Source(s) of Pre-imaging

• ---(Empty)---

Pre-imaging sources not listed above

• ---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing
 Category for each Observing Template ?

• N/A

Do all your finding charts comply with both the general and instrument-specific
 Phase 2 Web Pages ?

• YES

If you submitted OBs for standard stars, did you specify the magnitude
 and spectral type of all standard stars in the OBs ?

• N/A

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• N/A

If you are observing Moving Targets, have you attached suitable ephemeris
 files to your OBs?

• N/A

If you have preferences which OBs should be executed first, did you make
 use of the User Priority field in the OBs ?

• N/A

If this is a run that requires coordinated observations with other facilities,
 did you give proper instructions in the Time-Critical Aspects Section ?

• N/A