J/ApJS/264/40 The AstroSat UV GOODS-N Deep Field cat. (AUDFn) (Mondal+, 2023)
The AstroSat UV Deep Field north: the Far- and Near-UltraViolet photometric
catalog.
Mondal C., Saha K., Bhattacharya S., Borgohain A., Tandon S.N.,
Rafelski M., Jansen R.A., Windhorst R.A., Teplitz H.I., Smith B.M.
<Astrophys. J. Suppl. Ser., 264, 40 (2023)>
=2023ApJS..264...40M 2023ApJS..264...40M (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, ultraviolet; Galaxy catalogs
Keywords: Ultraviolet sources; High-redshift galaxies; Catalogs
Abstract:
We present deep UV imaging observations of the Great Observatories
Origins Survey Northern (GOODS-N) field with AstroSat/UVIT (AstroSat
UV Deep Field north-AUDFn), using one far-UV (FUV) (F154W, 34.0ks) and
two near-UV (NUV) filters (N242W, 19.2ks; N245M, 15.5ks). The nature
of the UV sky background was explored across the UVIT field, and a
global mean and rms were estimated for each filter. We reach 3σ
detection limits of mAB∼27.35, 27.28, and 27.02mag for a point
source in the F154W, N242W, and N245M bands respectively. The 50%
completeness limits of the FUV and NUV images are mAB=26.40 and
27.05mag respectively. We constructed point-spread functions for each
band and estimated their FWHM, which were found to be almost the same:
1.18" in F154W, 1.11" in N242W, and 1.24" in N245M. We used SExtractor
to separately identify sources in the FUV and NUV filters and produce
the UV source catalog of the entire AUDFn field. The source count
slope estimated in FUV and NUV is 0.57dex/mag (between 19 and 25mag)
and 0.44dex/mag (between 18 and 25mag), respectively. The catalog
contains 6839 and 16171 sources (brighter than the 50% completeness
limit) in the FUV and NUV, respectively. Our FUV and NUV flux
measurements of the identified sources complement existing multiband
data in the GOODS-N field, and enable us to probe rest-frame FUV
properties of galaxies at redshift z<1 and search for candidate Lyman
continuum leakers at redshift z>0.97.
Description:
We used the Ultra-Violet Imaging Telescope (UVIT) on board the
AstroSat satellite to observe the GOODS-N deep field. The UVIT
instrument consists of two telescopes, each with a circular field of
view with a diameter of 28'. One telescope observes in an FUV band
while the other operates both an NUV and a visible channel. We used
two broadband filters, F154W (1340-1800Å) for FUV and
N242W (1700-3050Å) for NUV, and one medium band filter,
N245M (2148-2711Å) for NUV to observe the GOODS-N field. The full
sequence of observations (proposal ID G08_077; PI, Kanak Saha) was
executed over 32 AstroSat orbits spanning UT 2018-March-10 to
2018-March-12.
Apart from the UVIT observations, we also make use of the HST CANDELS
photometric catalog of the GOODS-N field from
Barro+ (2019, J/ApJS/243/22) in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7a.dat 213 16761 The NUV catalog
table7b.dat 213 16001 The FUV catalog
table8.dat 149 27209 Content of the UV catalog for HST-detected
clean sources
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
II/261 : GOODS initial results (Giavalisco+, 2004)
J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
J/ApJ/592/728 : Lyman break galaxies at redshift z∼3 (Steidel+, 2003)
J/AJ/127/180 : The Hawaii Hubble Deep Field North (Capak+, 2004)
J/ApJ/617/240 : Oxygen abundances in GOODS-North field (Kobulnicky+, 2004)
J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006)
J/ApJ/653/1004 : Galaxies at 1.4≲z≲3.0 in GOODS-North Field (Reddy+, 2006)
J/ApJ/668/839 : Spectrophotometric redshifts for HUDF galaxies (Ryan+, 2007)
J/ApJ/675/234 : Stellar mass functions for 0<z<4 gal. (Perez-Gonzalez+, 2008)
J/ApJ/689/687 : GOODS-N spectroscopic survey (Barger+, 2008)
J/ApJS/188/178 : VLA 1.4GHz obs. of GOODS-North field (Morrison+, 2010)
J/ApJS/193/14 : DEEP3 Galaxy Redshift Survey: GOODS-N field (Cooper+, 2011)
J/PASJ/63/S379 : MOIRCS Deep Survey deep and wide catalogs (Kajisawa+, 2011)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)
J/ApJ/762/46 : SHARDS: GOODS-N spectrophot. survey (Perez-Gonzalez+, 2013)
J/ApJ/769/80 : Spitzer/IRAC observations of five deep fields (Ashby+, 2013)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
J/AJ/150/153 : Team Keck Redshift Survey 2 (TKRS2) (Wirth+, 2015)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)
J/MNRAS/471/210 : eMERGE Survey. I. VLA 5.5GHz sources (Guidetti+, 2017)
J/ApJS/243/22 : CANDELS/SHARDS multiwavelength cat. in GOODS-N (Barro+, 2019)
Byte-by-byte Description of file: table7[ab].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- ID Identification number in the catalog
(N1-N16761 for NUV or F1-F16001 for FUV)
8- 16 F9.4 pix Xpix Centroid of X pixel coordinate
18- 26 F9.4 pix Ypix Centroid of Y pixel coordinate
28- 37 F10.6 deg RAdeg [188.7/189.8] Right Ascension (J2000)
39- 47 F9.6 deg DEdeg [62/62.6] Declination (J2000)
49- 55 F7.4 mag N242kmag [16.4/36.5]?=99 N242W magnitude from kron
aperture (G1)
57- 66 F10.4 mag e_N242kmag [0.0017/6043]?=99 Uncertainty in N242kmag (G1)
68- 74 F7.4 mag N242cmag [16.3/37.7]?=99 N242W magnitude from 1.4"
circular aperture (G1) (1)
76- 85 F10.4 mag e_N242cmag [0.002/10629]?=99 Uncertainty in N242cmag (G1)
87- 93 F7.4 mag N245kmag [16.3/37.5]?=99 N245M magnitude from kron
aperture (G1)
95- 104 F10.4 mag e_N245kmag [0.003/15128]?=99 Uncertainty in N245kmag (G1)
106- 112 F7.4 mag N245cmag [16.2/36.5]?=99 N245M magnitude from 1.4"
circular aperture (G1) (1)
114- 123 F10.4 mag e_N245cmag [0.004/4581]?=99 Uncertainty in N245cmag (G1)
125- 131 F7.4 mag F154kmag [19.3/37.1]?=99 F154W magnitude from kron
aperture (G1)
133- 142 F10.4 mag e_F154kmag [0.01/12936]?=99 Uncertainty in F154kmag (G1)
144- 150 F7.4 mag F154cmag [19.6/37.9]?=99 F154W magnitude from 1.4"
circular aperture (G1) (1)
152- 161 F10.4 mag e_F154cmag [0.01/11446]?=99 Uncertainty in F154cmag (G1)
163- 168 F6.3 pix FRad [0/33] Radius that encloses 50% of object's
total N242W flux
170- 173 F4.2 --- KRad [0/10] Kron aperture radius in units of A or
B in N242W image
175- 180 F6.3 pix Aimg [0.5/15] Semi-major axis; A_IMAGE in
SExtractor
182- 188 F7.5 pix e_Aimg [0.008/2] Uncertainty in Aimg
190- 194 F5.3 pix Bimg [0.3/9.4] Semi-minor axis; B_IMAGE in
SExtractor
196- 202 F7.5 pix e_Bimg [0.007/0.7] Uncertainty in Bimg
204- 209 F6.2 deg PA [-90/90] Source position angle
211 I1 --- HST [0/1] HST flag (1=within the HST coverage)
213 I1 --- UV [0/1] AstroSat flag (1=also detected
in FUV/NUV image)
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Note (1): Including the aperture correction.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID [7/35451] CANDELS/GOODS-north catalog
identifier (<[BPC2019] NNNNN> in Simbad)
7- 16 F10.6 deg RAdeg [188.9/189.6] Right Ascension (J2000)
18- 26 F9.6 deg DEdeg [62/62.4] Declination (J2000)
28- 36 F9.6 mag F154c1mag [22/42]?=99 F154W magnitude from 0.7"
circular aperture (1)
38- 47 F10.6 mag e_F154c1mag [0.04/346]?=99 Uncertainty in F154c1mag
49- 57 F9.6 mag F154c2mag [21.2/39]?=99 F154W magnitude from 1.4"
circular aperture (1)
59- 67 F9.6 mag e_F154c2mag [0.02/89]?=99 Uncertainty in F154c2mag
69- 77 F9.6 mag N242c1mag [18.7/40.4]?=99 N242W magnitude from 0.7"
circular aperture (1)
79- 88 F10.6 mag e_N242c1mag [0.004/102]?=99 Uncertainty in N242c1mag
90- 98 F9.6 mag N242c2mag [18.2/40]?=99 N242W magnitude from 1.4"
circular aperture (1)
100- 108 F9.6 mag e_N242c2mag [0.003/72]?=99 Uncertainty in N242c2mag
110- 118 F9.6 mag N245c1mag [19.3/40.3]?=99 N245M magnitude from 0.7"
circular aperture (1)
120- 129 F10.6 mag e_N245c1mag [0.01/196]?=99 Uncertainty in N245c1mag
131- 139 F9.6 mag N245c2mag [18.7/36.7]?=99 N245M magnitude from 1.4"
circular aperture (1)
141- 149 F9.6 mag e_N245c2mag [0.009/39]?=99 Uncertainty in N245c2mag
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Note (1): Not aperture-corrected. The aperture correction magnitudes for both
the 0.7" and 1.4" apertures are listed in Table 6:
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Filt r=0.7" r=1.4"
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F154W 1.02 0.39
N242W 1.10 0.44
N245M 1.17 0.46
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Global notes:
Note (G1): The magnitude is given as '99' when the total background-subtracted
source-flux within that aperture is <0.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Mar-2023