J/MNRAS/428/1128 UDS/COSMOS HiZELS galaxies (Sobral+, 2013)
A large Hα survey at z = 2.23, 1.47, 0.84 and 0.40: the 11 Gyr evolution
of star-forming galaxies from HiZELS.
Sobral D., Smail I., Best P.N., Geach J.E., Matsuda Y., Stott J.P.,
Cirasuolo M., Kurk J.
<Mon. Not. R. Astron. Soc., 428, 1128-1146 (2013)>
=2013MNRAS.428.1128S 2013MNRAS.428.1128S
ADC_Keywords: Surveys ; Galaxy catalogs ; Photometry, H-alpha ;
Photometry, infrared
Keywords: galaxies: evolution - galaxies: high-redshift -
galaxies: luminosity function, mass function - cosmology: observations
Abstract:
This paper presents new deep and wide narrow-band surveys undertaken
with United Kingdom Infrared Telescope (UKIRT), Subaru and the Very
Large Telescope (VLT), a unique combined effort to select large,
robust samples of Hα star-forming galaxies at z = 0.40, 0.84,
1.47 and 2.23 (corresponding to look-back times of 4.2, 7.0, 9.2 and
10.6Gyr) in a uniform manner over ∼2deg2 in the Cosmological
Evolution Survey and Ultra Deep Survey fields. The deep multi-epoch
Hα surveys reach a matched 3σ flux limit of ∼3M☉/yr
out to z=2.2 for the first time, while the wide area and the coverage
over two independent fields allow us to greatly overcome cosmic
variance and assemble by far the largest samples of Hα emitters.
Catalogues are presented for a total of 1742, 637, 515 and 807
Hα emitters, robustly selected at z = 0.40, 0.84, 1.47 and 2.23,
respectively, and used to determine the Hα luminosity function
and its evolution.
Description:
Optical imaging data were obtained with Suprime-Cam using the NB921
narrow-band filter. The COSMOS field was observed in service mode in
2010 December with four different pointings covering the central
1.1deg2. Total exposure times were 2.9ks per pointing, composed
of individual exposures of 360s dithered over eight different
positions.
The UDS field has also been observed with the NB921 filter (see Ouchi
et al., 2010ApJ...723..869O 2010ApJ...723..869O), and these data have been extracted from
the archive.
The COSMOS and UKIDSS UDS fields were observed with WFCAM on UKIRT ,
using the NBJ, NBH and NBK narrow-band filters.
The UKIDSS UDS and COSMOS fields were observed with the HAWK-I
instrument on the VLT during 2009. A single dithered pointing was
obtained in each of the fields using the H2 filter, characterized by
λc=2.124um and δλ=0.030um (note that the filter
is slightly wider than that on WFCAM).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 135 9776 Catalogue of all Σ>3 NB921 narrow-band sources
selected in the UDS and COSMOS fields from HiZELS
tablea2.dat 130 1251 Catalogue of all Σ>3 NBJ narrow-band sources
selected in the UDS and COSMOS fields from HiZELS
tablea3.dat 130 1141 Catalogue of all Σ>3 NBH narrow-band sources
selected in the UDS and COSMOS fields from HiZELS
tablea4.dat 130 1758 Catalogue of all Σ>3 NBK narrow-band sources
selected in the UDS and COSMOS fields from HiZELS
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See also:
II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)
http://www.roe.ac.uk/ifa/HiZELS : HiZELS Home Page
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- --- [HiZELS-]
8- 34 A27 --- ID Name (COSMOS-NB921DTCS12-NNNNNN or
UDS-NB921DTCS12-NNNNNN)
36- 45 F10.6 deg RAdeg Right ascension (J2000)
47- 55 F9.6 deg DEdeg Declination (J2000)
57- 66 F10.6 --- Sig3 Significance of the narrow-band excess in
3" aperture
68- 77 F10.6 [mW/m2] logFlux [-17.1/-14.] Estimated flux (erg/s)
79- 91 F13.6 0.1nm EWHa Observed Hα equivalent width (Å)
93-101 F9.6 mag NB921 UKIRT/WFCAM NB921 marrow-band (0.9196µm)
magnitude (3" aperture, AB)
103-108 F6.4 mag e_NB921 rms uncertainty on NB921
110-118 F9.6 mag Zmag ?=99 UKIRT/WFCAM Z broad-band magnitude
(3" aperture, AB scale)
120-128 F9.6 mag e_Zmag ?=99 rms uncertainty on zmag
130 I1 --- Ha [0/1] Hα selection flag:
1 = classified as Hα emitter
132-133 I2 --- f1 [-1/1] Artifact flag (FCSTAR) caused by bright
stars, artifacts have value 1 (1)
135 I1 --- f2 [0/1] Spurious source flag (FLOWSN) in low S/N
regions, spurious have value 1 (1)
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Note (1): The cleanest list is obtained by setting FCSTAR<1.0 & FLOWSN<1.0.
Out of the 9776 sources, there are 1463 sources flagged as artifacts due to
bright stars (or with their flux little to heavily affected by artifacts
caused by bright stars) and 949 spurious sources.
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Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- --- [HiZELS-]
8- 34 A27 --- ID Name (COSMOS-NBJDTCS12-NNNNNN or
UDS-NBJDTCS12-NNNNNN)
36- 45 F10.6 deg RAdeg Right ascension (J2000)
47- 55 F9.6 deg DEdeg Declination (J2000)
57- 66 F10.6 --- Sig2 Significance of the narrow-band excess
(2" aperture)
68- 77 F10.6 [mW/m2] logFlux [-16.2/-14.9] Estimated flux (erg/s)
79- 91 F13.6 0.1nm EWHa Observed Hα equivalent width
93-101 F9.6 --- NBJ UKIRT/WFCAM NB_J narrow-band (1.211µm)
magnitude (2" aperture, Vega scale)
103-108 F6.4 --- e_NBJ rms uncertainty on NBJ
110-118 F9.6 --- Jmag UKIRT/WFCAM J Broad-band magnitude
(2" aperture, Vega scale)
120-128 F9.6 --- e_Jmag rms uncertainty on Jmag
130 I1 --- Ha [0/1] Hα selection flag:
1 = classified as Hα emitter
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- --- [HiZELS-]
8- 34 A27 --- ID Name (COSMOS-NBHDTCS12-NNNNNN or
UDS-NBHDTCS12-NNNNNN)
36- 45 F10.6 deg RAdeg Right ascension (J2000)
47- 55 F9.6 deg DEdeg Declination (J2000)
57- 66 F10.6 --- Sig2 Significance of the narrow-band excess
(2" aperture)
68- 77 F10.6 [mW/m2] logFlux [-16.5/-14.3] Estimated flux (erg/s)
79- 91 F13.6 0.1nm EWHa Observed Hα equivalent width
93-101 F9.6 --- NBH UKIRT/WFCAM NB_H narrow-band (1.617µm)
magnitude (2" aperture, Vega scale)
103-108 F6.4 --- e_NBH rms uncertainty on NBH
110-118 F9.6 --- Hmag UKIRT/WFCAM H broad-band magnitude
(2" aperture, Vega scale)
120-128 F9.6 --- e_Hmag rms uncertainty on Hmag
130 I1 --- Ha [0/1] Hα selection flag:
1 = classified as Hα emitter
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- --- [HiZELS-]
8- 34 A27 --- ID Name (COSMOS-NBKDTCS12-NNNNNN or
UDS-NBKDTCS12-NNNNNN)
36- 45 F10.6 deg RAdeg Right ascension (J2000)
47- 55 F9.6 deg DEdeg Declination (J2000)
57- 66 F10.6 --- Sig2 Significance of the narrow-band excess
(2" aperture )
68- 77 F10.6 [mW/m2] logFlux [-16.7/-14.6] Estimated flux (erg/s)
79- 91 F13.6 0.1nm EWHa Observed Hα equivalent width
93-101 F9.6 --- NBK UKIRT/WFCAM NB_K narrow-band (2.121µm)
magnitude (2" aperture, Vega scale)
103-108 F6.4 --- e_NBK rms uncertainty on NBK
110-118 F9.6 --- Kmag ?=99 UKIRT/WFCAM K broad-band magnitude
(2" aperture, Vega scale)
120-128 F9.6 --- e_Kmag ?=99 rms uncertainty on Kmag
130 I1 --- Ha [0/1] Hα selection flag:
1 = classified as Hα emitter
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Jan-2014