J/PAZh/33/657 JHKLM photometry of eight planetary nebulae (Taranova+, 2007)
Infrard photometry eight planetary nebulae.
Taranova O.G., Shenavrin V.I.
<Pis'ma Astron. Zh. 33, 657 (2007)>
=2007PAZh...33..657T 2007PAZh...33..657T
=2007AstL...33..584T 2007AstL...33..584T
ADC_Keywords: Planetary nebulae; Photometry, infrared
Abstract:
We discuss the infrared (IR) (1.25-5microns) photometry of eight
planetary nebulae performed in 1999-2006. For all of the nebulae under
study, we have firmly established IR brightness and color variations
on time scales shorter than one year and up to 6-8 years. The greatest
IR brightness variations were observed in IC 2149, IC 4997, and
NGC 7662. Their J magnitudes varied within 0.2-0.25mag. In the
remaining objects, the J magnitude variations did not exceed 0.15mag.
All of the planetary nebulae under study exhibited IR color
variations. Based on the IR photometry, we have classified the central
regions of planetary nebula NGC 1514 and of the northern part of
NGC 7635 seen through a 12" aperture as B(3-7) main-sequence star
(NGC 1514) and O9.5 upper-main-sequence star (NGC 7635). The nebulae
IC 4997 and NGC 7027 exhibited an excess emission (with respect to the
emission from a hot source) at wavelength more than 2.5micron.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 62 8 List of program PNe
table2.dat 84 84 JHKLM photometry for eight PNe in 1999-2006
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of planetary nebulae
10- 16 A7 --- Std Name of the star used as photometric standard
18- 19 I2 h RAh Right ascension (J2000)
21- 22 I2 min RAm Right ascension (J2000)
24- 28 F5.2 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 40 F4.1 arcsec DEs Declination (J2000)
42- 45 F4.2 mag E(B-V) Reddening
47- 51 F5.3 kpc Dist Distance
53- 57 F5.1 arcsec Diam Angular diameter
59- 62 F4.1 arcsec DiamKs ? Ks-band angular diameter
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of PN
11- 21 F11.3 d JD JD Observation date
24- 28 F5.2 mag Jmag ? J magnitude
31- 34 F4.2 mag e_Jmag ? Standard deviation in Jmag
37- 41 F5.2 mag Hmag ? H magnitude
44- 47 F4.2 mag e_Hmag ? Standard deviation in Hmag
50- 54 F5.2 mag Kmag ? K magnitude
57- 60 F4.2 mag e_Kmag ? Standard deviation in Kmag
63- 66 F4.2 mag Lmag ? L magnitude
69- 72 F4.2 mag e_Lmag ? Standard deviation in Lmag
75- 78 F4.2 mag Mmag ? M mean magnitude
81- 84 F4.2 mag e_Mmag ? Standard deviation in Mmag
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(End) Veta Avedisova [INASAN] 04-Apr-2008