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Table 1.

Example of entries in the LoTSS-DR1 source catalogue.

Source ID RA Dec Speak Sint Maj Min DC_Maj DC_Min PA rms Type Mosaic Number Masked Arte-
(mJy beam−1) (mJy) (″) (″) (″) (″) (°) (mJy beam−1) pointings fraction fact
ILTJ140629.07 211.6211° 54.0190° 0.3 0.6 9.0 7.3 6.7 4.1 89 0.08 S P209+55 2 0.00 ×
+540108.3 ±1.2″ ±0.8″ ±0.1 ±0.1 ±2.9 ±2.0 ±2.9 ±2.0 ±64
ILTJ113833.90 174.6413° 52.4434° 0.4 0.5 7.7 5.2 0.0 0.0 87 0.06 S P12Hetdex11 4 0.00 ×
+522636.3 ±0.6″ ±0.3″ ±0.1 ±0.1 ±1.3 ±0.6 ±1.3 ±0.6 ±19
ILTJ114532.75 176.3864° 47.9582° 0.4 0.4 7.3 5.8 4.2 0.0 61 0.06 S P15Hetdex13 4 0.00 ×
+475729.5 ±0.6″ ±0.5″ ±0.1 ±0.1 ±1.5 ±0.9 ±1.5 ±0.9 ±36
ILTJ114443.86 176.1827° 46.5350° 1.4 2.2 8.7 6.2 6.3 1.7 168 0.11 S P15Hetdex13 2 0.77 ×
+463206.0 ±0.2″ ±0.4″ ±0.1 ±0.2 ±0.8 ±0.5 ±0.8 ±0.5 ±12
ILTJ134204.70 205.5196° 49.5226° 1.0 1.1 6.8 6.0 0.0 0.0 87 0.06 S P42Hetdex07 3 1.00 ×
+493121.4 ±0.2″ ±0.2″ ±0.1 ±0.1 ±0.5 ±0.4 ±0.5 ±0.4 ±21
ILTJ111452.35 168.7181° 54.7318° 0.5 0.4 5.9 5.4 0.0 0.0 121 0.08 S P169+55 3 0.71 ×
+544354.6 ±0.4″ ±0.3″ ±0.1 ±0.1 ±0.9 ±0.8 ±0.9 ±0.8 ±70
ILTJ122721.08 186.8378° 50.8748° 0.6 3.0 17.3 10.2 16.2 8.3 18 0.06 S P26Hetdex03 4 0.60 ×
+505229.1 ±0.4″ ±0.7″ ±0.1 ±0.1 ±1.8 ±0.9 ±1.8 ±0.9 ±10
ILTJ121124.15 182.8506° 47.0435° 1.9 8.0 27.5 5.5 0.0 0.0 177 0.11 M P19Hetdex17 3 0.93 ×
+470236.5 ±1.8″ ±0.2″ ±0.1 ±0.3 ±4.2 ±0.4 ±4.2 ±0.4 ±6
ILTJ143026.91 217.6121° 48.0969° 0.5 0.6 7.3 6.2 4.2 1.7 135 0.06 S P217+47 3 0.70 ×
+480548.8 ±0.4″ ±0.4″ ±0.1 ±0.1 ±1.0 ±0.7 ±1.0 ±0.7 ±35
ILTJ124531.14 191.3797° 53.6874° 0.4 0.7 10.6 6.2 8.8 1.7 46 0.06 S P191+55 4 0.59 ×
+534114.7 ±0.7″ ±0.7″ ±0.1 ±0.1 ±2.1 ±0.8 ±2.1 ±0.8 ±17
ILTJ144630.58 221.6274° 52.8271° 0.6 7.4 25.7 17.0 25.0 15.9 61 0.30 S P223+52 3 1.00
+524937.5 ±3.6″ ±2.8″ ±0.2 ±0.2 ±9.2 ±5.7 ±9.2 ±5.7 ±47
ILTJ115435.71 178.6488° 49.2769° 0.3 0.4 9.9 5.0 0.0 0.0 102 0.06 S P18Hetdex03 5 0.00 ×
+491636.8 ±1.0″ ±0.4″ ±0.1 ±0.1 ±2.5 ±0.7 ±2.5 ±0.7 ±15
ILTJ134314.24 205.8093° 51.0778° 0.3 0.6 8.5 7.7 6.0 4.8 166 0.06 S P206+52 4 0.00 ×
+510440.1 ±0.6″ ±0.7″ ±0.1 ±0.1 ±1.8 ±1.5 ±1.8 ±1.5 ±87
ILTJ150957.26 227.4886° 54.5732° 0.4 1.9 15.8 11.4 14.6 9.7 99 0.14 S P227+53 2 0.00 ×
+543423.6 ±2.5″ ±1.6″ ±0.1 ±0.2 ±5.9 ±3.8 ±5.9 ±3.8 ±56

Notes. The entire catalogue contains 325 694 sources. The entries in the catalogue are as follows: source identifier (ID), J2000 right ascension (RA), J2000 declination (Dec), peak brightness (Speak), integrated flux density (Sint), major axis (Maj), minor axis (Min), deconvolved major axis (DC Maj), deconvolved minor axis (DC Min), position angle (PA), local noise at the position of the source (rms), type of source as classified by PyBDSF (Type–where “S” indicates an isolated source that is fit with a single Gaussian; “C” represents sources that are fit by a single Gaussian but are within an island of emission that also contains other sources; and “M” is used for sources that are extended and fitted with multiple Gaussians), the mosaic identifier (Mosaic), the number of pointings that are mosaiced at the position of the source (Number pointings), the fraction of pointings in which the source is in the deconvolution mask (Masked fraction), and whether or not the entry is believed to be an artefact (Artefact). Only 2590 entries have been identified as artefacts (see Williams et al. 2019). The errors in the catalogue are the uncertainties obtained from the PyBDSF source fitting. Additional uncertainties on the source extensions, astrometry, and flux scale are described in Sect. 3.

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