README web version of /home/usg/OPS/MTS/readme_xml/readme_80040501
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
This is a long-slit spectroscopy programme aimed to measure the
kinematic signature (i.e. local minimum in the radial profile of the
Gauss-Hermite h4 moment) that a peanut-shaped bar produces in face-on
barred galaxies.
We plan to take:
1) 4x45min LSS spectra along the bar major axis of NGC4262 and NGC4838
with the galaxy nucleus centered in the slit.
2) 4x42min LSS spectra along the bar major axis of NGC4477
with the galaxy nucleus centered in the slit.
3) LSS spectra of 2 bright stars to be used as kinematical templates.
The position angle of the bar major axis of NGC4262 (PA=16.6 deg),
NGC4477 (PA=13.0deg), and NGC4838 (PA=46.5deg) has been measured
from the available surface photometry.
Obtaining the 4 spectra for each sample galaxy is crucial to get the
required SNR in order to fulfill our scientific aim. Instead of having 2
spectra for 2 different galaxies, we need to have 4 spectra for the
same target. Therefore, if it is possible, all the OBs related to the
same galaxy have to be completed before selecting a new target from
this programme.
The offset for nodding target galaxies on the slit are specified in
the repeated spectra. NGC4262 and NGC4838 fit in the field of view
of "master" CCD of FORS2. NGC4477 fits in the field of view of FORS2.
Spectra of kinematical template stars have to be obtained with the
slit oriented according to the parallacting angle.
Kinematical template stars are:
name alpha(2000.0) delta(2000.0) type B
--------- ------------- ------------- ------ ----
SAO101053 14:29:53.688 16:12:31.550 K5III 9.04
SAO119387 12:25:22.478 05:54:28.950 K0III 10.64
Please check that their spectra have high SNR but do not
saturate. Indeed exposure times have been estimated with ETC (v.3.1.1)
to be useful in a wide range of seeing, airmass, and lunar phase.
Waiver Requests
Critical Observing Condition Constraints
Time-Critical Aspects
Special Execution Requirements
NGC4262 and NGC4838 fit the field of view of the "master" CCD of FORS2.
After centering the galaxy nucleus in the slit, we apply an offset
of about +200 arcsec in the CCD Y direction to put the galaxy nucleus
close to the center of the field of view of the "master" CCD of FORS2.
On the contrary, NGC4477 fits the field of view of FORS2 and the
galaxy nucleus is centered on it.
Special Calibration Information
ToO Information
ToO Activators List
Is this a Pre-imaging run ?
Pre-imaging Requirements
Source(s) of Pre-imaging
Pre-imaging sources not listed above
Do all your OBs comply with the instrument-specific requirements listed
on the instrument-specific Phase 2 web page ?
If this is a pre-imaging run, did you select PRE-IMAGING for the Observing
Category for each Observing Template ?
Do all your finding charts comply with both the general and instrument-specific
Phase 2 Web Pages ?
If you submitted OBs for standard stars, did you specify the magnitude
and spectral type of all standard stars in the OBs ?
Have you included OBs for any calibrations that you need but which are
not part of the Calibration Plan ?
If you are observing Moving Targets, have you attached suitable ephemeris
files to your OBs?
If you have preferences which OBs should be executed first, did you make
use of the User Priority field in the OBs ?
If this is a run that requires coordinated observations with other facilities,
did you give proper instructions in the Time-Critical Aspects Section ?
If you have prepared your finding charts with tools other than FIMS,
do they comply with the specifications on the FORS1 Phase 2 web page ?
Last creation of page: Tue Oct 6 15:40:21 2009
If you have comments, please contact usd-help@eso.org