J/A+A/563/A63 Optical spectra of new low-excitation PNs (Hsia+, 2014)
Discovery of new low-excitation planetary nebulae.
Hsia C.-H., Zhang Y.
<Astron. Astrophys. 563, A63 (2014)>
=2014A&A...563A..63H 2014A&A...563A..63H
ADC_Keywords: Stars, late-type ; Planetary nebulae ; Spectroscopy
Keywords: surveys - planetary nebulae: general - stars: AGB and post-AGB
Abstract:
We present mid-resolution spectroscopic observations of four new
planetary nebula (PN) candidates selected from the INT/WFC Photometric
H-alpha Survey of the Northern Galactic Plane (IPHAS) and Deep Sky
Hunter (DSH) catalogues. The PN status of these objects was confirmed
by mid-resolution spectra. Based on the locations of these objects in
the log(H-alpha/[NII]) versus log (H-alpha/[SII]) diagnostic
diagram, these sources are evolved low- excitation PNs.
Description:
Calibrated mid-resolution spectroscopic data of four new
low-excitation PNs. The observations were carried out with the
mid-dispersion OMR instrument at the NAOC 2.16m telescope with a
spectral resolution of ∼2Å/pixel. The data were taken from 2011
September 24 to 26. These spectra cover the wavelength range from
4750-7450Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
pne.dat 82 4 List of studied PNs
list.dat 91 8 List of FITS images
sp/* . 4 Individual observed line intensities
[F(Hα)=100] and identifications
fits/* . 8 Individual FITS images in Hα and [OIII]
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See also:
J/A+A/504/291 : Candidate Planetary Nebulae in IPHAS catalog (Viironen+, 2009)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix Scale Scale of the image
26- 29 I4 pix Nx Number of pixels along X-axis
30 A1 --- --- [x]
31- 33 I3 pix Ny Number of pixels along Y-axis
35- 52 A18 --- FITSfile Name of FITS file in subdirectory fits
54- 76 A23 --- Name PN name
78- 91 A14 --- Title Title of the file
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Byte-by-byte Description of file: pne.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name PN name
25- 26 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
28- 29 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
31- 35 F5.2 s RAs Simbad Second of Right Ascension (J2000.0)
37 A1 --- DE- Simbad Sign of the Declination (J2000.0)
38- 39 I2 deg DEd Simbad Degree of Declination (J2000.0)
41- 42 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
44- 48 F5.2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
50- 54 F5.2 mag Jmag ?=- 2MASS J band magnitude
56- 60 F5.2 mag Hmag ?=- 2MASS H band magnitude
62- 66 F5.2 mag Kmag ?=- 2MASS Ks band magnitude
68- 70 A3 --- Mcl Classical morphology: R=round, E=elliptical,
B=bipolar
72- 82 A11 --- SpFile Name of the spectroscopic file in
subdirectory sp
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
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2- 5 I4 0.1nm lambda [4861/7330] Wavelength λ in Angstroms
9- 16 A8 --- Ion The ion of the most probable identification
18- 22 F5.1 --- Flux ? Normalized line fluxes, F(lambda) (1)
26- 27 I2 % e_Flux ? Total flux uncertainty
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Note (1): Fluxes relatives to Hα=100.
The actual values of Hα fluxes are:
DSH 1941.3+2430 : F(Hα)=6.23x10-15erg/cm2/s=6.23fW/m2
IPHAS J194226.1+214522: F(Hα)=1.46x10-14erg/cm2/s=14.6fW/m2
IPHAS J195248.8+255359: F(Hα)=9.97x10-14erg/cm2/s=99.7fW/m2
IPHAS J232713.1+650923: F(Hα)=3.51x10-14erg/cm2/s=35.1fW/m2
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Acknowledgements:
Chih-Hao Hsia, xiazh(at)hku.hk
(End) Patricia Vannier [CDS] 13-Jan-2014