VizieR

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Simple Target List Of Targets Fast Xmatch with large catalogs or Simbad

Target Name (resolved by Sesame) or Position:	Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)	Radius Box size

	J/ApJS/270/33	17891		MeerKAT Absorption Line Survey (MALS). I. DR1 (Deka+, 2024) ReadMe+ftp 2024ApJS..270...33D Similar Catalogs Post annotation
1.	J/ApJS/270/33/catalog		The complete MeerKAT Absorption Line Survey (MALS) DR1 (v2) radio source catalog (735646 rows) metaJ/ApJS/270/33/catalog

Simple Constraint List Of Constraints

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Column

Constraint

Explain (UCD)

recno

Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

IDPtg

[1/782] Pointing sequence number (id_x) (meta.id)

Pointing

(char)

MALS pointing ID (JHHMMSS.ss+DDMMSS.s) based on the position (J2000) of the central source in NVSS or SUMSS (pointing_name) (meta.id)

Date1

"Y:M:D"

⁽ⁿ⁾⁽ⁱ⁾ The date and time (UTC) of the start of L-band observing block (s) (ISO) (obs_datel) (time.start;meta.table)

Date2

"Y:M:D"

⁽ⁿ⁾Second date and time (UTC) of the start of L-band observing block (s) (ISO) if any (obs_datel_2) 62 A1 — Band Observing band (always "L") (obs_band) (time.start;meta.table)

FluxCal1

(char)

Calibrator used for flux density and bandpass calibration of the data set (fluxcal) (phot.flux.density;em.radio.750-1500MHz)

FluxCal2

(char)

Second calibrator used for flux density and bandpass calibration of the data set if any (fluxcal) (phot.flux.density;em.radio.750-1500MHz)

FluxSc

(char)

Flux density scales used for the flux density calibrators (fluxscale) (Note 1) (phot.flux.density;em.radio.750-1500MHz)

SPW/WB

(char)

Whether the continuum image is made using an SPW or the entire wideband (WB) (spw_id) (Note 2) (spect.line.width)

Freq

MHz

[1005.8/1381.2] Reference frequency of the continuum image (ref_freq) (em.freq)

Majaxis

arcsec

[7.6/22.2] Major axis of the restoring beam (maj_restoringbeam) (phys.angSize;instr.beam)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

Minaxis

arcsec

[6/11.7] Minor axis of the restoring beam (min_restoringbeam) (phys.angSize;instr.beam)

deg

[-86.5/89] Position angle of the restoring beam (pa_restoringbeam) (pos.posAng;instr.beam)

sigma1

uJy/beam

[15/1312] RMS noise measured from primary beam-uncorrected rms image in an annular ring at primary beam FWHM (sigma_1) (instr.det.noise)

sigma2

uJy/beam

[13/645] RMS noise measured from primary beam-uncorrected rms image in an annular ring at 2 times the primary beam FWHM (sigma_2) (instr.det.noise)

sigma20

uJy/beam

[26/2530] RMS noise at a cumulative fraction of 0.2 of the rms noise distribution of the primary beam-corrected rms image (see Wagenveld+ 2023 for details) (sigma_20) (instr.det.noise)

⁽ⁱ⁾ [735647/1471292] Identifier (source_id) (meta.id)

Name

(char)

⁽ⁱ⁾ MALS name of the source (JHHMMSS.ss+DDMMSS.s) (source_name) (meta.id;meta.main)

SepPtg

arcmin

[0.0003/86] Distance of the source from the pointing center (distance_pointing) (pos.angDistance)

SepNN

arcmin

[0.1/25] Distance of the source from the nearest neighbor in the field (distance_nn) (pos.angDistance)

Scode

(char)

[MS] The PyBDSF code defining the source structure (s_code) (Note 3) (meta.code)

Ngauss

[1/96] Number of Gaussian components fitted to the source (n_gauss) (meta.number)

GaussMax

arcsec

⁽ⁿ⁾ [0.08/450] Maximum separation between the Gaussian components (NULL for "S"-type sources) (maxsep_gauss) (pos.angDistance)

MajFWHM

arcsec

[5/366] FWHM of the major axis of the source (maj) (phys.angSize)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

e_MajFWHM

arcsec

[0.001/81] 1σ error on MajFWHM (maj_e) (stat.error)

MinFWHM

arcsec

[2/144] FWHM of the minor axis of the source (min) (phys.angSize)

e_MinFWHM

arcsec

[0.0005/29.3] 1σ error on MinFWHM (min_e) (stat.error)

MajPA

deg

[3.6e-5/180] Position angle of the major axis of the source measured east of north (PA) (pos.posAng)

e_MajPA

deg

[2.2e-5/180] 1σ error on MajPA (pa_e) (stat.error)

Maj0FWHM

arcsec

[0/366] FWHM of the deconvolved major axis of the source (dc_maj) (phys.angSize)

e_Maj0FWHM

arcsec

[0.001/81] 1σ error on Maj0FWHM (dc_maje) (stat.error)

Min0FWHM

arcsec

[0/143] FWHM of the deconvolved minor axis of the source (dc_min) (phys.angSize)

e_Min0FWHM

arcsec

[0.0005/29.3] 1σ error on Min0FWHM (dc_mine) (stat.error)

Maj0PA

deg

[0/180] Position angle of the deconvolved major axis of the source measured east of north (dc_pa) (pos.posAng)

e_Maj0PA

deg

[2.2e-5/180] 1σ error on Maj0PA (dc_pae) (stat.error)

RAJ2000

deg

⁽ⁱ⁾ Right ascension (J2000) of the mean intensity-weighted position of all pixels above the island threshold measured if source is fitted with multiple Gaussians (ra_mean) (pos.eq.ra;meta.main)

e_RAJ2000

deg

[5.5e-05/0.007] 1σ error on RAdeg using Equation 1 (ra_meane) (stat.error;pos.eq.ra)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

DEJ2000

deg

⁽ⁱ⁾ [-79/32.2] Declination (J2000) of the mean intensity-weighted position of all pixels above the island threshold measured if source is fitted with multiple Gaussians (dec_mean) (pos.eq.dec;meta.main)

e_DEJ2000

deg

[8.3e-5/0.01] 1σ error on DEdeg using Equation 1 (dec_meane) (stat.error;pos.eq.dec)

RAMdeg

deg

The R.A. (J2000) of the pixel corresponding to maximum flux density (ra_max) (pos.eq.ra)

e_RAMdeg

deg

[5.5e-5/0.007] 1σ error on RAMdeg using Equation 1 (ra_maxe) (stat.error)

DEMdeg

deg

[-79/32.2] The decl. (J2000) of the pixel corresponding to maximum flux density (dec_max) (pos.eq.dec)

e_DEMdeg

deg

[8.3e-5/0.01] 1σ error on DEMdeg using Equation 1 (dec_maxe) (stat.error)

Flux

mJy

[0.015/17901] Total integrated flux density of the source based on Gaussian component fits, i.e., corrected for primary beam and wideband effects (total_flux) (phot.flux.density;em.radio.750-1500MHz)

e_Flux

mJy

[0.009/968] 1σ error on Flux estimated using Equation 2 (total_fluxe) (stat.error;phot.flux)

ErrFlux

[0.007/549] The fitting error on total flux density to be taken into account to obtain e_Flux (see Section 4.2 and Equation 2) (total_fluxe_fit) (stat.error)

sErrFlux

[0.006/797] The systematic error to be taken into account to obtain e_Flux (see Section 4.2 and Equation 2) (total_fluxe_sys) (stat.error)

FluxAlt

mJy

[0.01/17473] Total integrated flux density of the source based on alternate primary beam model, i.e., plumber (Section 4.3) obtained by multiplying Flux and FluxCorr (total_fluxmeasured) (phot.flux.density;em.radio.750-1500MHz)

e_FluxAlt

mJy

[0.009/957] 1σ error on FluxAlt (total_fluxmeasured_e) (stat.error)

FluxPk

mJy/beam

[0.03/11876] Peak flux density of the source (peak_flux) (phot.flux.density;em.radio.750-1500MHz)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

e_FluxPk

mJy/beam

[0.006/46] 1σ error on FluxPk (peak_fluxe) (stat.error)

FluxIsl

mJy

[-0.03/17981] Total integrated flux density of the island in which the source is located (isl_totalflux) (phot.flux.density;em.radio.750-1500MHz)

e_FluxIsl

mJy

[0.009/236] 1σ error on FluxIsl (isl_totalflux_e) (stat.error)

rmsIsl

mJy/beam

[0.009/46] Average background rms noise of the island in which the source is located (isl_rms) (stat.stdev;instr.det.noise;stat.mean)

Isl

mJy/beam

[-22/23] Average background mean value of the island in which the source is located (isl_mean) (instr.background;stat.mean)

ResrmsIsl

mJy/beam

[0/51] Average residual background rms noise of the island in which the source is located (resid_islrms) (stat.fit.residual;instr.det.noise;stat.mean)

ResIsl

mJy/beam

[-25/35] Average residual background mean value of the island in which the source is located (resid_islmean) (instr.background;stat.mean)

FluxCorr

[0.9/1.1] The factor to be multiplied to flux density measurements and errors to obtain the values corresponding to the plumber beam model (see Section 4.3 and Appendix C) (flux_correction) (arith.factor)

Real

(char)

Whether a source is a real astrophysical source or an artifact (Always "True") (real_source) (meta.code)

Res

(char)

Whether a source is resolved based on the reliability envelope method (see Figure 10) (resolved) (meta.code)

SpWind

(char)

Spectral windows used for determining spectral index and curvature using the narrowband multifrequency synthesis (MFS) images (spectral_indexspwused) (Note 5) (meta.note)

Spwfit

⁽ⁿ⁾ [-50/45] Spectral index and curvature of the source based on Flux from narrowband (i.e., SPW-based) images (spectral_indexspwfit) (spect.index)

e_Spwfit

⁽ⁿ⁾ [0.006/7] 1σ error on Spwfit (spectral_indexspwfit_e) (stat.error)

SpMALS

⁽ⁿ⁾ [-2.6/2] Spectral index and curvature based on Flux from narrowband images from MALS and measurements from the literature (spectral_indexmals_lit) (spect.index)

e_SpMALS

⁽ⁿ⁾ [0.04/0.5] 1σ error on SpMALS (spectral_indexmals_lite) (stat.error)

SpIndLit

(char)

List of external surveys ("TGSS-ADR1", "L:9" or "L:2") used (spectral_indexlit) (meta.bib)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

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