GALEX Target Field of View Simulator
====================================

The attached PDF files show a 5 x 5 degree region of the sky centered on
the input coordinates. The field name and field center J2000 Ecliptic
and Galactic coordinates are shown above the plot.

The GALEX field of view, circular with diameter 1.25 degrees, is
centered on the input coordinates and is plotted in black.

Circles in blue show the position of planned GALEX observations, annotated
with the target ID. Pink circles show planned GIP cycle 2 observations.
Small red circles show the position of the science targets supplied in
the phase-II xml file.

The background grayscale image shows the diffuse 100 micron emission
(MJy/sr) taken from the COBE normalized IRAS cirrus maps of Schlegel,
Finkbeiner, & Davis (1998). The maximum, minimum, and median 100
micron emission in the 5x5 region is given at the top of the page.
The graysacle is on a linear scale from the minimum (white) to maximum
(black) levels.

I100 = 0.73 MJy/sr corresponds to: E(B-V) ~ 0.015 
                                   AV ~ 0.0465 
                                   nHI ~ 9 x 10^19 cm-2 

I100 = 1.07 MJy/sr corresponds to: E(B-V) ~ 0.02
                                   AV ~ 0.062
                                   nHI ~ 1.2 x 10^20 cm-2

The positions of stars in the 5x5 degree target field are extracted
from three catalogs: TD-1 (Thompson et al. 1978), Tycho2 (Hog et
al. 2000), and SK2 (Myers et al. 2002). These positions are plotted
using 2 symbols:

Small green diamonds - stars with GALEX NUV fluxes estimated to be
                       < 5000 counts/second and so pose no threat to 
                       GALEX detectors.

Blue stars - Stars with GALEX NUV fluxes estimated to be >= 5000 cts/s.
             The size of the stars indicates the estimated NUV count 
             rate (on a logarithmic scale). The scale for the blue 
             stars is given below the plot.

Also shown are the regions around the blue stars (hashed blue circles)
that must be avoided by the GALEX field of view to pass the star
brightness limits:

NUV Count Rate (counts/sec) / Distance from center of GALEX field 
                              of view (degrees)

      5000 / 0.75
     50000 / 0.88
    200000 / 1.00
    500000 / 1.50
   1000000 / 2.00
                                                         
Stars that fail any of these brightness limits are plotted in red and
the outer circle of the exclusion region is over-plotted with a red
dashed line.

Note that observations to be made in the petal pattern mode now have 
a point source count rate limit for the NUV detector of 30000 cts/s.
Other count rate limits remain the same.

REFERENCES

Schlegel, D.J., Finkbeiner, D.P., & Davis, M. ApJ, 500, 525 (1998)
   "Maps of Dust IR Emission for Use in Estimation of Reddening and 
   CMBR Foregrounds"
   
Thompson, G.I., Nandy, K., Jamar, C., Monfils, A., Houziaux, L.,
Carnochan, D.J., & Wilson, R. (1978) The Science Research Council, U.K.
   "A compilation of absolute  stellar fluxes measured by the Sky Survey 
   Telescope (S2/68) aboard the ESRO satellite TD-1", 
   http://cdsweb.u-strasbg.fr/viz-bin/Cat?II/59B
   http://adsabs.harvard.edu/cgi-bin/bib_query?1982A&AS...49..427W

Hog E., Fabricius C., Makarov V.V., Urban S., Corbin T., Wycoff G., 
Bastian U., Schwekendiek P., Wicenec A., Astron. Astrophys. 355, L27 (2000)
   The Tycho-2 Catalogue of the 2.5 Million Brightest Stars, 
   http://www.astro.ku.dk/~erik/Tycho-2/

Myers et al. (2002) Goddard Space Flight Center, Flight Dynamics Division:
   SKY2000 Master Catalog, Version 4:
   http://mmfd.gsfc.nasa.gov/dist/generalProducts/attitude/ATT_SKY2KV1_aiaa_fnl.h