RA Range: 10h - 15h

Constraint set (Typical seeing, Transparency,Airmass, FLI, Moon distance): 0.4, 2CLR, 2.0, 1.0, 30

Pre-imaging run?	No!	Chilean run?	No!	Special calibrations?	No!
Time critical?	No!	ToO?	No!	Carry-over run?	No!

 
 
  Single target program using one dichroic setting only. The primary
goal is to map the velocity field of neutral interstellar gas very
close (<1") to the nucleus of the active elliptical galaxy NGC4261
from the NaI D absorption lines near 5900 A, in order to estimate
the mass of central black holes. The blue frames are needed to map
emission line gas at 3727 and 5007 A.

  Observations consist of two 30min spectra to be taken along (more or
less) the disk major axis (PA=0) and two along the minor axis (PA=90)
of the target which has an elliptical dust patch in the center (about
1.7"x 0.8") oriented with major axis near PA=0.

  Very demanding program as far as seeing is concerned (user relaxed 
it from 0.4" to 0.5", but not more because the gravitational influence 
of the black hole can only be seen at this level of sub-arcsec scales).

  One spectral profile template star needs to be observed with exactly
the same instrumental setup used for the galaxy. P.I. has provided two
such stars, at different RA. Please choose just one.


 

Run status page 67.B-0429A

README of this run:

67.B-0429A.README