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Table 2

Observations.

(a)
Date Type Telescope Instrument Filter CWL/FW(Å) PA* Exp. (s)

2014-Aug-27 Imaging Aristarchos1 – 2.3 m LN CCD Hα 6567/17 1800
Imaging Aristarchos – 2.3 m LN CCD [N ii] 6588/17 1800

2014-Nov-28 Spectroscopy SPM2 – 2.12 m MES Hα+[N ii] 6541/90 45° 1800
Spectroscopy SPM – 2.12 m MES Hα+[N ii] 6541/90 30° 1800
Spectroscopy SPM – 2.12 m MES [O iii] 4984/60 45° 1800
Spectroscopy SPM – 2.12 m MES [O iii] 4984/60 30° 1800

2015-Mar-27 Spectroscopy SPM – 2.12 m MES Hα+[N ii] 6541/90 9° 1800

2015-Mar-28 Spectroscopy SPM – 2.12 m MES Hα+[N ii] 6541/90 9° 1800
Spectroscopy SPM – 2.12 m MES [O iii] 4984/60 9° 1800

(b)

Date Type Telescope Instrument Filter/grism CWL/FW(Å) PA Exp. (s)

1995-Nov-8 Imaging HST3 – 2.4 m WFPC2 F658N 6591/29 1400
1997-Aug-1 Imaging HST3 – 2.4 m WFPC2 F658N 6591/29 1200

2007-Sep-3/5 Imaging NOT4 – 2.5 m ALFOSC Hα 6577/180 3600

2010-Feb-6/7 Imaging KPNO5 – 4 m CCD Mosaic Hα 6563/80 7440

2010-Feb-12 Imaging WISE6 – 40 cm Survey Camera B3 (12 μm)7 4422

2007-Sep-3 Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 31° 3600

2007-Sep-4 Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 86° 1800
Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 107° 1500
Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 312° 1800

2007-Sep-5 Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 49° 1800
Spectroscopy NOT – 2.5 m ALFOSC g17 6600/500 173° 1800

2010-Feb-10 Spectroscopy KPNO – 4 m RC-Spec BL400 5500/7000 89.7° 9600

Notes.(a) Are newly acquired for this work whereas (b) were obtained from data archives.

(1)

Aristarchos Telescope, Helmos Observatory;

(2)

San Pedro Mártir Observatory;

(3)

Hubble Space Telescope;

(4)

Nordic Optical Telescope;

(5)

Mayall Telescope, Kitt Peak National Observatory;

(6)

Wide-field Infrared Survey Explorer;

(7)

WISE band 3 has a resolution of 6.5′′.

(*)

PA = Position Angle.

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