2 Observations

The IFU observations were performed using the Wide Field Spectrograph (WiFeS; Dopita et al., 2007; Dopita et al., 2010) mounted on the 2.3-m Australian National University (ANU) telescope on 2010 April 20. Table 1 presents an observation journal, including the exposure time used for each PN in our WiFeS observations (column 3), and information on the HST observations (columns 5-8).

Table 1: Journal of observations.

Object	Other name	WiFeS			HST
		Exp. (s)	Obs. Date		Filter	Exp. (s)	Obs. Date	Programme ID
Hen3-1333	PNG332.9$-$09.9	1200	2010 Apr 20		F606W	56	2002 Sep 17	9463
Hen2-113	PNG321.0$+$03.9	60,1200	2010 Apr 20		F814W	56	2003 Mar 09	9463

WiFeS is an image-slicing IFU developed and built for the ANU, feeding a double-beam spectrograph. It has a field-of-view (FOV) of 25 arcsec $\times$ 38 arcsec and a spatial resolution of 1 arcsec. We used the spectral resolution of $R\sim 7000$. The classical data accumulation mode was used, so a suitable sky window has been selected from the science data for the sky subtraction purpose. We also acquired series of bias, dome flat-field frames, twilight sky flats, arc lamp exposures, wire frames and standard stars for bias-subtraction, flat-fielding and calibrations (fully described by Danehkar, 2014).

Figure: HST images of Hen3-1333 (top panel) taken with the F606W filter, and Hen2-113 (bottom panel) taken with the F814W filter and ACS/HRC detector (Programme ID 9463, PI. R. Sahai). The image scale is shown by a solid line in each image. North is up and east is towards the left-hand side.

The WiFeS data were reduced using the IRAF pipeline WIFES (version 2.14). We utilized the same data reduction procedure described in detail by Danehkar et al. (2013) and Danehkar et al. (2014), which includes flat-fielding, bias-subtraction, wavelength calibration, spatial calibration and flux calibration.

Figure: From left to right, spatial distribution maps of flux intensity and LSR velocity of H$\alpha$ $\lambda$6563 for (a) Hen3-1333 and (b) Hen2-113. Flux unit is in $10^{-15}$ ergs${}^{-1}$cm${}^{-2}$spaxel${}^{-1}$ and velocities in kms${}^{-1}$. The white/black contour lines show the distribution of the narrow-band emission of H$\alpha$ in arbitrary unit obtained from the SuperCOSMOS H$\alpha$ Survey (Parker et al., 2005). North is up and east is towards the left-hand side.

(a) Hen3-1333

(b) Hen2-113