J/A+AS/125/293 NGC 2366, NGC 2403 & NGC 4236 HK' photometry (Pierini+ 1997)
New infrared H and K' surface photometry of three Tully-Fisher calibrators:
N 2366, N 2403 and N4236
Pierini D., Gavazzi G., Boselli A., Tuffs R.
<Astron. Astrophys. Suppl. Ser. 125, 293 (1997)>
=1997A&AS..125..293P 1997A&AS..125..293P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry ; Photometry, infrared
Keywords: galaxies: photometry - infrared: galaxies -
galaxies: individual: NGC 2366, NGC 2403, NGC 4236
Abstract:
Near Infrared H and K' surface photometry of the three nearby galaxies
NGC 2366, NGC 2403 and NGC 4236, used as local calibrators of the
Tully-Fisher relation, was obtained using the 2562 NICMOS3 IR array
MAGIC attached to the 2.2 m telescope of Calar Alto. The present
measurements are compared with the aperture photometry available in
the literature. Surface brightness profiles and integrated magnitudes
are given.
Objects:
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RA (2000) DE Designation(s)
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07 28 41 +69 11 26 NGC 2366
07 36 50 +65 36 16 NGC 2403
12 16 48 +69 28 NGC 4236
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Table1: Galaxy parameters
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Name RA (1950) DE a25 b25 type
arcmin
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NGC 2366 07 23 38.00 69 19 15.0 7.59 3.55 Irr
NGC 2403 07 32 05.00 65 42 42.0 17.78 10.96 Sc
NGC 4236 12 14 32.00 69 45 00.0 18.62 6.92 Irr
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Table2: Image characteristics
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Name band texp seeing sky rms
s arcsec mag/arcsec2
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NGC 2366 H 672 2.1 13.78 22.12
NGC 2366 K' 640 3.3 13.01 21.78
NGC 2403 H 126 2.1 13.86 20.77
NGC 2403 K' 240 2.7 13.11 20.64
NGC 4236 H 420 2.4 13.80 21.66
NGC 4236 K' 400 3.2 13.03 21.06
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Table3: Photometric parameters derived by AA80,
Aaronson et al. (1980ApJ...237..655A 1980ApJ...237..655A), and
in this work using circular aperture
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AA80 | This work
Name a-0.5 H-0.5 | H-0.5 K'-0.5 H-Tot K'-Tot
arcmin mag | mag mag mag mag
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NGC 2366 2.04 10.82 | 10.94 10.60 9.80±0.11 9.30±0.13
NGC 2403 5.13 6.45 | 6.65 6.47 6.27±0.10 6.03±0.10
NGC 4236 4.68 9.08 | 9.46 9.27 9.00±0.12 8.69±0.14
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4 48 154 Differential and integrated magnitudes derived
along elliptical annuli
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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1- 8 A8 --- NGC NGC name
10- 12 I3 deg PA Position angle of the galaxy major axis
(measured Eastwards from North)
14- 17 F4.2 --- Eps Ellipticity (1-(b/a)) of the rings
19- 23 F5.1 arcsec Rad Major semiaxis of the elliptical annulus
25- 29 F5.2 mag/arcsec SuBrH ? H band surface brightness
31- 35 F5.2 mag Hmag ? Integrated H magnitude
37- 41 F5.2 mag/arcsec SuBrK' ? K' band surface brightness
43- 47 F5.2 mag K'mag ? Integrated K' magnitude
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Acknowledgements: Daniele Pierini
(End) Patricia Bauer [CDS] 23-May-1997