Brief program summary and its significance:

	"Spectroscopic and Color Imaging of Planetary Nebulae" 
		    (Gruenwald, Viegas and de Souza)
	
	
	Abundances in Planetary Nebulae are usually obtained applying 
empirical methods and line intensity ratios observed with a given slit. 
Several conclusions are obtained regarding, for example, metal enrichment. 
Since high spatial resolution show that most of these objects are asymmetrical
and/or inomogeneous, abundances in these objects can not be obtained using  
empirical methods or spherically symmetrical photoionization models. 
Furthermore, temperature determinations imply the existence of condensations 
in these objects.  
	Our group recently developed a 3 dimensional photoionization code that 
provides a detailed analysis of asymmetrical and/or inomogeneous nebulae. 
The geometry can then be analised in detail, providing reliable abundances and 
testing the existence of the condensations. For this kind of analysis, we need
high spatial resolution spectroscopic imaging (requiring an IFU or a 
Fabry-Perot spectrograph) 


Needed instrumentation: IFU or Fabry-perot spectrograph

Required minimum field of view (arcmin): ~ 6'

Required psf (FWHM, profile details): psf <= 0.1" in order to resolve 
condensations

Typical target separation if multiple targets per exposure: ---

Signal/noise required per resolution element: > 10

Typical exposure time for this S/N & lunar phase: 1 hour; dark time

Anticipated photometric dynamic range required: ---

What additional photometric calibrations are required? ---

If IR, is tip/tilt feasible (consider isoplanatic patch)? yes

Anticipated number of separate pointings to complete program: --- 

Can this program execute in a queue? yes

Anticipated post-focus instrumentation requirements (filters, gratings,
etc.): B, V ; I, J, H, K filters

Required instruments (spectral R, filters, wavelength range): 
	R > 5000
	3000 - 7500A
        1 - 2.5 microns

How soon might you need to revisit this target with another instrument? ---

Why can't this program execute on the Blanco 4m?  -> we need high spatial 
resolution

References (for non-mainstream applications): ---