J/MNRAS/443/41 Deep NIR photometry of HI galaxies in ZoA (Williams+, 2014)
Deep NIR photometry of HI galaxies in the Zone of Avoidance.
Williams W.L., Kraan-Korteweg R.C., Woudt P.A.
<Mon. Not. R. Astron. Soc., 443, 41-57 (2014)>
=2014MNRAS.443...41W 2014MNRAS.443...41W
ADC_Keywords: Galaxies, photometry ; Photometry, infrared
Keywords: surveys - dust, extinction - galaxies: photometry - infrared: galaxies
Abstract:
Current studies of the peculiar velocity flow field in the local
Universe are limited by either the lack of detection or accurate
photometry for galaxies at low Galactic latitudes. The contribution to
the dynamics of the Local Group of the largely unknown mass
distribution in this 'Zone of Avoidance' (ZoA) remains controversial.
We present here the results of a pilot project to obtain deep
near-infrared (NIR) observations of galaxies detected in the
systematic Parkes deep HI survey of the ZoA (HIZOA) - 578 galaxies with
recession velocities out to 6000km/s were observed with the 1.4m
InfraRed Survey Facility SIRIUS (Simultaneous InfraRed Imager for
Unbiased Surveys) camera providing J, H and Ks
imaging 2mag deeper than 2MASS. After star subtraction, the resulting
isophotal magnitudes and inclinations of ZoA galaxies are of
sufficient accuracy (magnitude errors under 0.1mag even at high
extinction) to ultimately be used to determine cosmic flow fields 'in'
the ZoA via the NIR Tully-Fisher relation. We further used the
observed NIR colours to assess the ratio of the true extinction to the
Diffuse Infrared Background Experiment/IRAS extinction deep into
the dust layers of the Milky Way. The derived ratio was found to be
0.87 across the HIZOA survey region with no significant variation with
Galactic latitude or longitude. This value is in excellent agreement
with the completely independently derived factor of 0.86 by Schlafly &
Finkbeiner (2010ApJ...725.1175S 2010ApJ...725.1175S) based on Sloan data far away from the
Milky Way.
Description:
The imaging data were acquired with the Japanese InfraRed Survey
Facility (IRSF), a 1.4m Alt-Azimuth Cassegrain telescope situated at
the South African Astronomical Observatory site in Sutherland, South
Africa. The IRSF is equipped with the Simultaneous InfraRed Imager for
Unbiased Surveys (SIRIUS) capable of simultaneous imaging in the three
NIR bands J, H and Ks. The camera consists of three 1024x1024 pixel
HgCdTe (HAWAII) arrays each with a gain of 5.5e-/ADU and a read-out
noise of 30e-, cooled to 80K. The field of view is
7.7-arcminx7.7-arcmin and the pixel scale is 0.45arcsec/pix.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 890 548 IRSF galaxy catalog
table5.dat 9 157 HI sources with no likely NIR counterpart
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See also:
J/A+A/505/29 : HI observations of 2MASS galaxies in ZoA (van Driel+, 2009)
J/A+AS/110/269 : Galaxies in the "zone of avoidance". I. (Weinberger+, 1995)
J/A+AS/117/1 : Galaxies in the "zone of avoidance". II. (Seeberger+, 1996)
J/A+AS/117/369 : Galaxies in the "zone of avoidance". III. (Lercher+, 1996)
J/A+AS/126/247 : Galaxies in the "zone of avoidance". IV. (Saurer+, 1997)
J/A+AS/127/101 : Galaxies in the "zone of avoidance". V. (Seeberger+ 1998)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/555] Sequential number (id)
5- 7 A3 --- --- [ZOA]
8- 27 A20 --- ZOA ZOA designation (HHMMSS.sss+DDMMSS.ss, J2000)
from the co-add centroid (designation)
29- 37 A9 --- OName Old HI catalogue name (JHHMM+DD) (Jname_old)
39- 47 A9 --- JName HI catalogue name (JHHMM+DD) (Jname)
49- 58 A10 "date" ObsDate Observaiton date (YYYY-MM-DD) (date)
60 I1 --- Ctp [0/5] Counterpart number (cntpart_number) (1)
61 A1 --- n_Ctp [*] * if counterpart is confirmed
63- 71 F9.5 deg RAdeg Right ascension (J2000) (ra)
73- 81 F9.5 deg DEdeg Declination (J2000) (dec)
83- 91 F9.5 deg GLON Galactic longitude (l)
93-101 E9.5 deg GLAT Galactic latitude (b)
103-107 F5.3 --- Jell [0/1] J-band ellipticity (1-b/a) (j_ell)
109-113 F5.3 --- e_Jell [0/1]? rms uncertainty on Jell (jellsig)
115-121 F7.3 deg Jphi [-90/90] J-band position angle (east of north)
(j_phi)
123-129 F7.3 deg e_Jphi [0/238]? rms uncertainty on Jphi (jphisig)
131-135 F5.3 --- Hell [0/1] H-band ellipticity (1-b/a) (h_ell)
137-141 F5.3 --- e_Hell [0/1]? rms uncertainty on Hell (hellsig)
143-149 F7.3 deg Hphi [-90/90] H-band position angle (east of north)
(h_phi)
151-157 F7.3 deg e_Hphi [0/123]? rms uncertainty on Hphi (hphisig)
159-163 F5.3 --- Kell [0/1] K-band ellipticity (1-b/a) (k_ell)
165-169 F5.3 --- e_Kell [0/1]? rms uncertainty on Kell (kellsig)
171-177 F7.3 deg Kphi [-90/90] K-band position angle (east of north)
(k_phi)
179-185 F7.3 deg e_Kphi [0/224]? rms uncertainty on Kphi (kphiell)
187-193 F7.3 arcsec rJ20e J20e fiducial isophotal radius (r_j20e)
195-200 F6.3 mag J20e ? J-band isophotal magnitude (jmj20e)
202-206 F5.3 mag e_J20e ? rms uncertainty on J20e (jmsigj20e)
208-214 F7.3 arcsec rH20e H20e fiducial isophotal radius (r_h20e)
216-221 F6.3 mag H20e ? H-band isophotal magnitude (hmh20e)
223-227 F5.3 mag e_H20e ? rms uncertainty on H20e (hmsigh20e)
229-235 F7.3 arcsec rK20e K20e fiducial isophotal radius (r_k20e)
237-242 F6.3 mag K20e ? K-band isophotal magnitude (kmk20e)
244-248 F5.3 mag e_K20e ? rms uncertainty on K20e (kmsigk20e)
250-256 F7.3 arcsec rJ21e J21e fiducial isophotal radius (r_j21e)
258-263 F6.3 mag J21e ? J-band isophotal magnitude (jmj21e)
265-269 F5.3 mag e_J21e ? rms uncertainty on J21e (jmsigj21e)
271-277 F7.3 arcsec rH21e H21e fiducial isophotal radius (r_h21e)
279-284 F6.3 mag H21e ? H-band isophotal magnitude (hmh21e)
286-290 F5.3 mag e_H21e ? rms uncertainty on H21e (hmsigh21e)
292-298 F7.3 arcsec rK21e ? K21e fiducial isophotal radius (r_k21e)
300-305 F6.3 mag K21e ? K-band isophotal magnitude (kmk21e)
307-311 F5.3 mag e_K21e ? rms uncertainty on K21e (kmsigk21e)
313-319 F7.3 arcsec rJ22e J22e fiducial isophotal radius (r_j22e)
321-326 F6.3 mag J22e ? J-band isophotal magnitude (jmj22e)
328-332 F5.3 mag e_J22e ? rms uncertainty on J22e (jmsigj22e)
334-340 F7.3 arcsec rH22e H22e fiducial isophotal radius (r_h22e)
342-347 F6.3 mag H22e ? H-band isophotal magnitude (hmh22e)
349-353 F5.3 mag e_H22e ? rms uncertainty on H22e (hmsigh22e)
355-361 F7.3 arcsec rK22e K22e fiducial isophotal radius (r_k22e)
363-368 F6.3 mag K22e ? K-band isophotal magnitude (kmk22e)
370-374 F5.3 mag e_K22e ? rms uncertainty on K22e (kmsigk22e)
376-382 F7.3 arcsec rk20fe Radius k20fe (r_k20fe)
384-389 F6.3 mag Jk20fe ? J-band magnitude at radius rk20fe (jmk20fe)
391-395 F5.3 mag e_Jk20fe ? rms uncertainty on Jk20fe (jmsigk20fe)
397-402 F6.3 mag Hk20fe ? H-band magnitude at radius rk20fe (hmk20fe)
404-408 F5.3 mag e_Hk20fe ? rms uncertainty on Hk20fe (hmsigk20fe)
410-415 F6.3 mag KHk20fe ? K-band magnitude at radius rk20fe (kmk20fe)
417-421 F5.3 mag e_KHk20fe ? rms uncertainty on KHk20fe (kmsigk20fe)
423-429 F7.3 arcsec rj21fe Radius j21fe (r_j21fe)
431-436 F6.3 mag Jj21fe ? J-band magnitude at radius rj21fe (jmj21fe)
438-442 F5.3 mag e_Jj21fe ? rms uncertainty on Jj21fe (jmsigj21fe)
444-449 F6.3 mag Hj21fe ? H-band magnitude at radius rj21fe (hmj21fe)
451-455 F5.3 mag e_Hj21fe ? rms uncertainty on Hj21fe (hmsigj21fe)
457-462 F6.3 mag Kj21fe ? K-band magnitude at radius rj21fe (kmj21fe)
464-468 F5.3 mag e_Kj21fe ? rms uncertainty on Kj21fe (kmsigj21fe)
470-476 F7.3 mag Jext ? J-band extrapolated total magnitude (jmext)
477 A1 --- u_Jext [I] I for infinity
480-485 F6.3 mag Hext ? H-band extrapolated total magnitude (hmext)
486 A1 --- u_Hext [I] I for infinity
490-496 F7.3 mag Kext ? K-band extrapolated total magnitude (kmext)
497 A1 --- u_Kext [I] I for infinity
499-504 F6.3 mag e_Jext ? rms uncertainty on Jext (jmsigext)
506 A1 --- f_Jext [I] I for infinity
509-513 F5.3 mag e_Hext ? rms uncertainty on Hext (hmsigext)
515 A1 --- f_Hext [I] I for infinity
517-522 F6.3 mag e_Kext ? rms uncertainty on Kext (kmsigext)
524 A1 --- f_Kext [I] I for infinity
527-532 F6.3 mag jdmext ? J-band difference between total magnitude
and the measured outer magnitude (jdmext)
533 A1 --- u_jdmext [I] I for infinity
536-541 F6.3 mag hdmext ? H-band difference between total magnitude
and the measured outer magnitude (hdmext)
542 A1 --- u_hdmext [I] I for infinity
545-550 F6.3 mag kdmext ? K-band difference between total magnitude
and the measured outer magnitude (kdmext)
551 A1 --- u_kdmext [I] I for infinity
554-559 F6.3 mag Jmag3 J-band magnitude 3" aperture (j_m3)
561-565 F5.3 mag e_Jmag3 rms uncertainty on Jmag3 (j_msig3)
567-572 F6.3 mag Jmag5 ? J-band magnitude 5" aperture (j_m5)
574-579 F6.3 mag e_Jmag5 ? rms uncertainty on Jmag5 (j_msig5)
581-586 F6.3 mag Jmag7 ? J-band magnitude 7" aperture (j_m7)
588-592 F5.3 mag e_Jmag7 ? rms uncertainty on Jmag7 (j_msig7)
594-599 F6.3 mag Jmag10 ? J-band magnitude 10" aperture (j_m10)
601-605 F5.3 mag e_Jmag10 rms uncertainty on Jmag10 (j_msig10)
607-612 F6.3 mag Jmag15 ? J-band magnitude 15" aperture (j_m15)
614-619 F6.3 mag e_Jmag15 rms uncertainty on Jmag15 (j_msig15)
621-626 F6.3 mag Hmag3 H-band magnitude 3" aperture (h_m3)
628-632 F5.3 mag e_Hmag3 rms uncertainty on Hmag3 (h_msig3)
634-639 F6.3 mag Hmag5 H-band magnitude 5" aperture (h_m5)
641-645 F5.3 mag e_Hmag5 rms uncertainty on Hmag5 (h_msig5)
647-652 F6.3 mag Hmag7 H-band magnitude 7" aperture (h_m7)
654-658 F5.3 mag e_Hmag7 rms uncertainty on Hmag7 (h_msig7)
660-665 F6.3 mag Hmag10 ? H-band magnitude 10" aperture (h_m10)
667-671 F5.3 mag e_Hmag10 ? rms uncertainty on Hmag10 (h_msig10)
673-678 F6.3 mag Hmag15 ? H-band magnitude 15" aperture (h_m15)
680-684 F5.3 mag e_Hmag15 ? rms uncertainty on Hmag15 (h_msig15)
686-691 F6.3 mag Kmag3 K-band magnitude 3" aperture (k_m3)
693-697 F5.3 mag e_Kmag3 rms uncertainty on Kmag3 (k_msig3)
699-704 F6.3 mag Kmag5 K-band magnitude 5" aperture (k_m5)
706-710 F5.3 mag e_Kmag5 rms uncertainty on Kmag5 (k_msig5)
712-717 F6.3 mag Kmag7 ? K-band magnitude 7" aperture (k_m7)
719-723 F5.3 mag e_Kmag7 rms uncertainty on Kmag7 (k_msig7)
725-730 F6.3 mag Kmag10 ? K-band magnitude 10" aperture (k_m10)
732-736 F5.3 mag e_Kmag10 ? rms uncertainty on Kmag10 (k_msig10)
738-743 F6.3 mag Kmag15 ? K-band magnitude 15" aperture (k_m15)
745-749 F5.3 mag e_Kmag15 ? rms uncertainty on Kmag15 (k_msig15)
751-756 F6.3 mag Jsbc ? J-band core surface brightness (jsbcore)
758-763 F6.3 mag Hsbc H-band core surface brightness (hsbcore)
765-770 F6.3 mag Ksbc K-band core surface brightness (ksbcore)
772-777 F6.3 mag Jpeak Peak J-band magnitude (j_peak)
779-784 F6.3 mag Hpeak Peak H-band magnitude (h_peak)
786-791 F6.3 mag Kpeak Peak K-band magnitude (k_peak)
793-798 F6.3 mag Jbg Sky background in J-band (j_back)
800-805 F6.3 mag Hbg Sky background in H-band (h_back)
807-812 F6.3 mag Kbg Sky background in K-band (k_back)
814-817 I4 pix Xpos [109/1208] X position on image (im_nx)
819-822 I4 pix Ypos [109/1208] Y position on image (im_nu)
824 I1 --- fp [0/8] Photometric quality flag (Photflag)
826 I1 --- fJ [0/1] J-band surface brightness flag (j_sbflag)
828 I1 --- fH [0/1] H-band surface brightness flag (h_sbflag)
830 I1 --- fK [0/1] K-band surface brightness flag (k_sbflag)
832-837 F6.3 mag Jzp J-band zero-point magnitude (j_magzp)
839-844 F6.3 mag Hzp H-band zero-point magnitude (h_magzp)
846-851 F6.3 mag Kzp K-band zero-point magnitude (k_magzp)
853-857 F5.3 arcsec Jsee [0.9/2.9] Seeing in J-band (j_see)
859-863 F5.3 arcsec Hsee [0.9/2.9] Seeing in H-band (h_see)
865-869 F5.3 arcsec Ksee [0.9/2.9] Seeing in K-band (k_see)
871-872 I2 --- nJ [12/24] Number of exposures in J-band (j_expos)
874-875 I2 --- nH [12/24] Number of exposures in H-band (h_expos)
877-878 I2 --- nK [12/24] Number of exposures in K-band (k_expos)
880-884 F5.2 mag E(B-V) Galactic reddening along the line of sight
(Schlegel et al., 1998ApJ...500..525S 1998ApJ...500..525S) (Ebv)
886-890 F5.3 [-] SD [3.4/5.4] Sellar density (SD) (2)
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Note (1): can be greater than 1 where more than one possible counterpart was
identified in the IRSF field of view.
Note (2): SD is log(N(K<14)/deg2), number of stars brighter than 14mag
in Ks detected with the IRSF per square degree
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- JName HI name (JHHMM+DDA)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Mar-2015