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Table C.1.

Columns available in the catalogue, together with the units and brief description of the column content.

No Column Units Description
1 name Source designation (JHHMMSS.ss+DDMMSS.s) without IGAPS prefix.
2 RA deg J2000 RA (Gaia DR2 reference frame).
3 Dec deg J2000 Dec (Gaia DR2 reference frame).
4 gal_long deg Galactic longitude.
5 gal_lat deg Galactic latitude.
6 sourceID Unique source identification string (run-ccd-detectionnumber).
7 posErr arcsec Astrometric fit error (rms) across the CCD.
8 mergedClass 1=galaxy, 0=noise, −1=star, 99=if different filters don’t agree. See Sect. 7.1.
9 pStar Probability that the source is stellar.
10 pGalaxy Probability that the source is extended.
11 pNoise Probability that the source is noise.
12 i mag IPHAS i mag (Vega) using the 2.3 arcsec aperture.
13 iErr mag Random uncertainty for i. When r is not available and no colour term has been
used, 0.05 mag has been added in quadrature.
14 iAB mag IPHAS i mag (AB) using the 2.3 arcsec aperture.
15 iEll Ellipticity in the i-band.
16 iClass 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the i band.
17 iDeblend True if the i source is blended with a nearby neighbour.
18 iSaturated True if the i source is saturated.
19 iVignetted True if the i source is in a part of focal plane where there is vignetting.
20 iTrail True if the i source is close to a linear artifact.
21 iTruncated True if the i source is close to the CCD boundary.
22 iBadPix True if there are bad pixel(s) in the i source aperture.
23 iMJD Modified Julian Date at the start of the i-band exposure.
24 iSeeing arcsec Average FWHM in the i-band exposure.
25 iDetectionID Unique i-band detection identifier (run-ccd-detectionnumber).
26 iDeltaRA arcsec Position offset of the i-band detection in RA.
27 iDeltaDec arcsec Position offset of the i-band detection in Dec.
28 ha mag IPHAS H-alpha mag (Vega) using the 2.3 arcsec aperture.
29 haErr mag Random uncertainty for ha.
30 haAB mag IPHAS ha mag (AB) using the 2.3 arcsec aperture.
31 haEll Ellipticity in ha band.
32 haClass 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the ha band.
33 haDeblend True if the ha source is blended with a nearby neighbour.
34 haSaturated True if the ha source is saturated.
35 haVignetted True if the ha source is in a part of focal plane where there is vignetting.
36 haTrail True if the ha source is close to a linear artifact.
37 haTruncated True if the ha source is close to the CCD boundary.
38 haBadPix True if there are bad pixel(s) in the ha source aperture.
39 haMJD Modified Julian Date at the start of the ha exposure.
40 haSeeing arcsec Average FWHM in the ha exposure.
41 haDetectionID Unique ha detection identifier (run-ccd-detectionnumber).
42 haDeltaRA arcsec Position offset of the ha-band detection in RA.
43 haDeltaDec arcsec Position offset of the ha-band detection in Dec.
44 r_I mag IPHAS r mag (Vega) using the 2.3 arcsec aperture.
45 rErr_I mag Random uncertainty for r_I.
46 rAB_I mag IPHAS r mag (AB) using the 2.3 arcsec aperture.
47 rEll_I Ellipticity in r_I.
48 rClass_I 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the r_I band.
49 rDeblend_I True if the r_I source is blended with a nearby neighbour.
50 rSaturated_I True if the r_I source is saturated.
51 rVignetted_I True if the r_I source is in a part of focal plane where there is vignetting.
52 rTrail_I True if the r_I source is close to a linear artifact.
53 rTruncated_I True if the r_I source is close to the CCD boundary.
54 rBadPix_I True if there are bad pixel(s) in the r_I source aperture.
55 rMJD_I Modified Julian Date at the start of the r_I exposure.
56 rSeeing_I arcsec Average FWHM in the r_I exposure.
57 rDetectionID_I Unique r_I detection identifier (run-ccd-detectionnumber).
58 r_U mag UVEX r mag (Vega) using the 2.3 arcsec aperture.
59 rErr_U mag Random uncertainty for r_U.
60 rAB_U mag UVEX r mag (AB) using the 2.3 arcsec aperture.
61 rEll_U Ellipticity in r_U.
62 rClass_U 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the r_U band.
63 rDeblend_U True if the r_U source is blended with a nearby neighbour.
64 rSaturated_U True if the r_U source is saturated.
65 rVignetted_U True if the r_U source is in a part of focal plane where there is vignetting.
66 rTrail_U True if the r_U source is close to a linear artifact.
67 rTruncated_U True if the r_U is close to the CCD boundary.
68 rBadPix_U True if there are bad pixel(s) in the r_U source aperture.
69 rMJD_U Modified Julian Date at the start of the r_U exposure.
70 rSeeing_U arcsec Average FWHM in ther_U exposure.
71 rDetectionID_U Unique r_U detection identifier (run-ccd-detectionnumber).
72 rDeltaRA_U arcsec Position offset of the r_U detection in RA.
73 rDeltaDec_U arcsec Position offset of the r_U detection in Dec.
74 g mag UVEX g mag (Vega) using the 2.3 arcsec aperture.
75 gErr mag Random uncertainty for g. When r is not available and no colour term has been
used, 0.05 mag has been added in quadrature.
76 gAB mag UVEX g mag (AB) using the 2.3 arcsec aperture.
77 gEll Ellipticity in the g-band.
78 gClass 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the g band.
79 gDeblend True if the g source is blended with a nearby neighbour.
80 gSaturated True if the g source is saturated.
81 gVignetted True if the g source is in a part of focal plane where there is vignetting.
82 gTrail True if the g source is close to a linear artifact.
83 gTruncated True if the g source is close to the CCD boundary.
84 gBadPix True if there are bad pixel(s) in the g source aperture.
85 gmask Source located in the inner (1) or outer (2) degraded area in the g-band filter.
86 gMJD Modified Julian Date at the start of the g-band exposure.
87 gSeeing arcsec Average FWHM in the g-band exposure.
88 gDetectionID Unique g-band detection identifier (run-ccd-detectionnumber).
89 gDeltaRA arcsec Position offset of the g-band detection in RA.
90 gDeltaDec arcsec Position offset of the g-band detection in Dec.
91 U_RGO mag UVEX U_RGO mag (Vega) using the 2.3 arcsec aperture. Default pipeline calibration.
92 UErr mag Random uncertainty for U_RGO. Pipeline random error only.
93 UEll mag Ellipticity in U_RGO band.
94 UClass 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the U_RGO band.
95 UDeblend True if the U_RGO source is blended with a nearby neighbour.
96 USaturated True if the U_RGO source is saturated.
97 UVignetted True if the U_RGO source is in a part of focal plane where there is vignetting.
98 UTrail True if the U_RGO is close to a linear artifact.
99 UTruncated True if the U_RGO is close to the CCD boundary.
100 UBadPix True if there are bad pixel(s) in the U_RGO source aperture.
101 UMJD Modified Julian Date at the start of the U_RGO exposure.
102 USeeing arcsec Average FWHM in the U_RGO exposure.
103 UDetectionID Unique U_RGO detection identifier (run-ccd-detectionnumber).
104 UDeltaRA arcsec Position offset of the U_RGO-band detection in RA.
105 UDeltaDec arcsec Position offset of the U_RGO-band detection in Dec.
106 brightNeighb True if a very bright star is nearby.
107 deblend True if the source is blended with a nearby neighbour in one or more bands.
108 saturated True if saturated in one or more bands.
109 nBands Number of bands in which the source is detected.
110 errBits Bitmask indicating: bright neighbour (1), source blending (2), trail (4), saturation (8),
outer gmask (16), vignetting (64), inner gmask (128), truncation (256)
and bad pixels (32768).
111 nObs_I Number of repeat IPHAS observations of this source.
112 nObs_U Number of repeat UVEX observations of this source.
113 fieldID_I Survey field identifier in IPHAS, e.g. 0001, 0001o, 0002, etc.
114 fieldID_U Survey field identifier in UVEX, e.g. 0001, 0001o, 0002, etc.
115 fieldGrade_I Internal quality control score of the IPHAS field. A to D scale.
116 fieldGrade_U Internal quality control score of the UVEX field. A to D scale.
117 emitter 2 if good candidate for Hα line emission, 1 if marginal, 0 if tested and in main locus,
null if not tested.
118 variable True if difference between the IPHAS and UVEX r measurements exceeds
5σ and 0.2 mag.
119 2SourceID SourceID of the object in the second detection.
120 i2 mag IPHAS i mag (Vega) for the secondary detection.
121 i2Err mag Random uncertainty for i2. When r2 is not available and no colour term has been used,
0.05 mag has been added in quadrature.
122 i2Class 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the i2 band.
123 i2Seeing arcsec Average FWHM in the i2 exposure.
124 i2MJD Modified Julian Date at the start of the i2 exposure.
125 i2DeltaRA arcsec Position offset of the i2-band detection in RA.
126 i2DeltaDec arcsec Position offset of the i2-band detection in Dec.
127 i2DetectionID Unique i2 detection identifier (run-ccd-detectionnumber).
128 i2ErrBits Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
vignetting (64), truncation (256) and bad pixels (32768) for i2.
129 ha2 mag IPHAS H-alpha mag (Vega) for secondary detection.
130 ha2Err mag Random uncertainty for ha2.
131 ha2Class 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the ha2 band.
132 ha2Seeing arcsec Average FWHM in the ha2 exposure.
133 ha2MJD Modified Julian Date at the start of the ha2 exposure.
134 ha2DeltaRA arcsec Position offset of the ha2-band detection in RA.
135 ha2DeltaDec arcsec Position offset of the ha2-band detection in Dec.
136 ha2DetectionID Unique ha2 detection identifier (run-ccd-detectionnumber).
137 ha2ErrBits Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
vignetting (64), truncation (256) and bad pixels (32768) for ha2.
138 r2_I mag IPHAS r mag (Vega) for the secondary detection.
139 r2Err_I mag Random uncertainty for r2_I.
140 r2Class_I 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the r2_I band.
141 r2Seeing_I arcsec Average FWHM in the r2_I exposure.
142 r2MJD_I Modified Julian Date at the start of the r2_I exposure.
143 r2DeltaRA_I arcsec Position offset of the r2_I-band detection in RA.
144 r2DeltaDec_I arcsec Position offset of the r2_I-band detection in Dec.
145 r2DetectionID_I Unique r2_I detection identifier (run-ccd-detectionnumber).
146 r2ErrBits_I Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
vignetting (64), truncation (256) and bad pixels (32768) for r2_I.
147 r2_U mag UVEX r mag (Vega) for the secondary detection.
148 r2Err_U mag Random uncertainty for r2_U.
149 r2Class_U 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the r2_U band.
150 r2Seeing_U arcsec Average FWHM in the r2_U exposure.
151 r2MJD_U Modified Julian Date at the start of the r2_U exposure.
152 r2DeltaRA_U arcsec Position offset of the r2_U-band detection in RA.
153 r2DeltaDec_U arcsec Position offset of the r2_U-band detection in Dec.
154 r2DetectionID_U Unique r2_U detection identifier (run-ccd-detectionnumber).
155 r2ErrBits_U Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
vignetting (64), truncation (256) and bad pixels (32768) for r2_U.
156 g2 mag UVEX g mag (Vega) for the secondary detection.
157 g2Err mag Random uncertainty for g2. When r2 is not available and no colour term has been used,
0.05 mag has been added in quadrature.
158 g2Class 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the g2 band.
159 g2Seeing arcsec Average FWHM in the is exposure.
160 g2MJD Modified Julian Date at the start of the g2 exposure.
161 g2DeltaRA arcsec Position offset of the g2-band detection in RA.
162 g2DeltaDec arcsec Position offset of the g2-band detection in Dec.
163 g2DetectionID Unique g2 detection identifier (run-ccd-detectionnumber).
164 g2ErrBits Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
outer gmask (16), vignetting (64), inner gmask (128), truncation (256) and
bad pixels (32768) for g2.
165 U_RGO2 mag UVEX U_RGO mag (Vega) for the secondary detection. Default pipeline calibration.
166 U2Err mag Random uncertainty for U_RGO2.
167 U2Class 1=galaxy, 0=noise, −1=star, −2=probableStar, −3=probableGalaxy for the U_RGO2 band.
168 U2Seeing arcsec Average FWHM in the U_RGO2 exposure.
169 U2MJD Modified Julian Date at the start of the U_RGO2 exposure.
170 U2DeltaRA arcsec Position offset of the U_RGO2-band detection in RA.
171 U2DeltaDec arcsec Position offset of the U_RGO2-band detection in Dec.
172 U2DetectionID Unique U_RGO2 detection identifier (run-ccd-detectionnumber).
173 U2ErrBits Bitmask indicating bright neighbour (1), source blending (2), trail (4), saturation (8),
vignetting (64), truncation (256) and bad pixels (32768) for U_RGO2.
174 errBits2 Global bitmask for the second detection indicating: bright neighbour (1), source blending (2),
trail (4), saturation (8), outer gmask (16), vignetting (64), inner gmask (128),
truncation (256) and bad pixels (32768).

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