Information regarding the following images:
These data were first described in E. W. Pellegrini et al., 
2010 ApJS 191 160, and their use should include a suitable referece.

1) Each pixel is 0.15 arcsec. 
2) The seeing is ~1 arcsec in the combined mosaics.
3) Units of each image are in Counts Per Second (CPS).
4) The central wave length of each filter is indicated in the file name.
   For example the redshifted [OIII] filter is centered at 5019Ang.

The width of each filter is taken to be the area integrated under the
transmission curve (Integral (T_lamda * d_Lamda)). To scale a continuum 
image in CPS to line image CPS use the following formulae:

6563 (Ha) continuum = 6850-drizzle.fits * 0.7343

6738 ([SII]) continuum = 6850-drizzle.fits * 0.4980

5019 ([OIII]) continuum = 5130-drizzle.fits * 0.2503.fits

Continnum subtracted images have been provided. To get the flux 
calibration constant to convert these to absolute fluxes please 
contact Eric Pellegrini.

Approximate saturation levels for each image are as follows:

5019-drizzle.fits : 340 cps
5130-drizzle.fits : 340 cps
6563-drizzle.fits : 470 cps
6738-drizzle.fits : 155 cps

If your target is saturated, a shorter, unsaturated exposure 
is most likely available and can be requested.

Eric Pellegrini