J/A+A/691/A104 Globular Cluster Pop. in NGC3640 Galaxy Group (Mirabile+, 2024)
VEGAS-SSS: Tracing globular cluster populations in the interacting NGC 3640
galaxy group.
Mirabile M., Cantiello M., Lonare P., Ragusa R., Paolillo M., Hazra N.,
La Marca A., Iodice E., Spavone M., Mieske S., Rejkuba M., Hilker M.,
Riccio G., Habas R.A., Brocato E., Schipani P., Grado A., Limatola L.
<Astron. Astrophys. 691, A104 (2024)>
=2024A&A...691A.104M 2024A&A...691A.104M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, globular ; Galaxies ; Photometry, SDSS ; Surveys
Keywords: galaxies: evolution - galaxies: groups: individual: NGC 3640 -
galaxies: peculiar - galaxies: star clusters: general -
galaxies: stellar content - galaxies: structure
Abstract:
Globular clusters (GCs) are among the oldest stellar systems in the
universe. As such, GCs population are valuable fossil tracers of
galaxy formation and interaction history. This paper is part of the
VEGAS-SSS series, which focuses on studying the properties of small
stellar systems (SSSs) in and around bright galaxies.
We use the multi-band wide-field images obtained with the VST to study
the properties of the globular cluster (GC) population in an
interacting pair of galaxies.
We derived ugri photometry over 1.5x1.5 sq. degrees centred on the
galaxy group composed by two elliptical galaxies: NGC 3640 and its
fainter companion NGC 3641. We studied the GC system properties from
both the ugri and gri matched catalogs. GC candidates were identified
based on a combination of photometric properties (colors, magnitudes)
and morphometric criteria (concentration index, elongation, FWHM,
etc.), using sources with well-defined classifications from
spectroscopic or imaging data available in the literature and
numerical simulations as references. The selection criteria were also
applied to empty fields to determine a statistical background
correction for the number of identified GC candidates.
The 2D density maps of GCs appear to align with the diffuse light
patches resulting from merging events of the galaxies. The highest
density peak of GCs is observed to be on NGC 3641 rather than NGC
3640, despite the latter being the more massive galaxy. The azimuthal
averaged radial density profiles in both galaxies reveal that the GC
population extends beyond the galaxy light profile and indicate the
likely presence of an intra-group GC component. A color bimodality in
(u-r) and (g-i) is observed for NGC 3641, whereas NGC 3640 shows a
broad unimodal distribution. Analysis of the GC Luminosity Function
indicates that both galaxies are roughly located at the same distance
(∼27Mpc). We provide an estimate of the total number of GCs, and
determine the specific frequency for NGC 3640, SN=2.0±0.6, which
aligns with expectations, while for NGC 3641 we find a large
SN=4.5±1.6.
Description:
Catalogues associated with our study on the GC population in the group
of galaxies around NGC3640. Our analysis is based on multi-wavelength
u, g, r, i data. The catalogues contain the photometric and
morphometric properties of all the sources across the field.
The reported magnitudes are not extinction corrected. The extinction
correction can be applied using the E(B-V) and the reddening
coefficients from Schlafly & Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S).
Researchers using this catalogue should cite our associated publication:
M. Mirabile, M. Cantiello, P. Lonare et al. 2024 'VEGAS-SSS: Tracing
Globular Cluster Populations in the Interacting NGC3640 Galaxy Group'
For any questions or additional information, please contact Marco
Mirabile at marco.mirabile(at)inaf.it.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
11 20 48.00 +03 20 00.0 NAME NGC 3640 Group = GHCG 76
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gcc_ugri.dat 1117 769 Galaxy Group candidates ugri matched catalog
gcc_gri.dat 910 4944 Galaxy Group candidates gri matched catalog
cat_u.dat 341 37885 Complete u-band catalog
cat_g.dat 341 186999 Complete g-band catalog
cat_r.dat 341 326699 Complete r-band catalog
cat_i.dat 341 198671 Complete i-band catalog
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Byte-by-byte Description of file: gcc_ugri.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- Sequ u band SExtractor Number
7- 17 F11.7 deg RAudeg u band Right Ascension (J2000)
19- 29 F11.7 deg DEudeg u band Declination (J2000)
31- 40 F10.4 pix Ximgu u band X position
42- 51 F10.4 pix Yimgu u band Y position
53- 59 F7.4 mag magAutou u band Automated magnitude (G1)
61- 66 F6.4 mag e_magAutou u band Error on automated
magnitude (G1)
68- 74 F7.4 mag magAperu u band Aperture magnitude
within 4 pixels diameter (G1)
76- 82 F7.4 mag magAper1u u band Aperture magnitude
within 6 pixels diameter (G1)
84- 90 F7.4 mag magAper2u u band Aperture magnitude
within 8 pixels diameter (G1)
92- 98 F7.4 mag magAper3u u band Aperture magnitude
within 19.04 pixels diameter (G1)
100- 106 F7.4 mag magAper4u u band Aperture magnitude
within 32 pixels diameter (G1)
108- 113 F6.4 mag e_magAperu u band Aperture magnitude error
within 4 pixels diameter (G1)
115- 120 F6.4 mag e_magAper1u u band Aperture magnitude error
within 6 pixels diameter (G1)
122- 127 F6.4 mag e_magAper2u u band Aperture magnitude error
within 8 pixels diameter (G1)
129- 135 F7.4 mag e_magAper3u u band Aperture magnitude error
within 19.04 pixels diameter (G1)
137- 143 F7.4 mag e_magAper4u u band Aperture magnitude error
within 32 pixels diameter (G1)
145- 151 F7.4 mag/arcsec2 muMaxu u band Peak model surface brightness
above the background (G1)
153- 164 E12.6 deg AWorldu u band Isophotal major axis (G1)
166- 177 E12.6 deg e_AWorldu u band Isophotal major axis
error (G1)
179- 190 E12.6 deg BWorldu u band Isophotal minor axis (G1)
192- 203 E12.6 deg e_BWorldu u band Isophotal minor axis
error (G1)
205- 209 F5.3 --- Elongu u band Elongation
(major/minor axis) (G1)
211- 216 F6.2 deg thetaWorldu u band Isophotal position angle (G1)
218- 222 F5.3 pix FluxRadu u band Radius containing 50%
of the light (G1)
224- 228 F5.2 --- KronRadu u band Kron radius (G1)
230- 234 F5.2 --- PetroRadu u band Petrosian radius (G1)
236- 245 F10.6 pix FWHMImgu u band Source FWHM (G1)
247 I1 --- Flagsu u band SExtractor flags (G1)
249- 253 F5.3 --- ClassStaru u band SExtractor star/galaxy
classifier (G1)
255- 260 I6 --- Seqg g band SExtractor Number
262- 272 F11.7 deg RAgdeg g band Right Ascension (J2000)
274- 284 F11.7 deg DEgdeg g band Declination (J2000)
286- 295 F10.4 pix Ximgg g band X position
297- 306 F10.4 pix Yimgg g band Y position
308- 314 F7.4 mag magAutog g band Automated magnitude (G1)
316- 321 F6.4 mag e_magAutog g band Error on automated
magnitude (G1)
323- 329 F7.4 mag magAperg g band Aperture magnitude
within 4 pixels diameter (G1)
331- 337 F7.4 mag magAper1g g band Aperture magnitude
within 6 pixels diameter (G1)
339- 345 F7.4 mag magAper2g g band Aperture magnitude
within 8 pixels diameter (G1)
347- 353 F7.4 mag magAper3g g band Aperture magnitude
within 19.04 pixels diameter (G1)
355- 361 F7.4 mag magAper4g g band Aperture magnitude
within 32 pixels diameter (G1)
363- 368 F6.4 mag e_magAperg g band Aperture magnitude error
within 4 pixels diameter (G1)
370- 381 E12.6 mag e_magAper1g g band Aperture magnitude error
within 6 pixels diameter (G1)
383- 388 F6.4 mag e_magAper2g g band Aperture magnitude error
within 8 pixels diameter (G1)
390- 396 F7.4 mag e_magAper3g g band Aperture magnitude error
within 19.04 pixels diameter (G1)
398- 404 F7.4 mag e_magAper4g g band Aperture magnitude error
within 32 pixels diameter (G1)
406- 412 F7.4 mag/arcsec2 muMaxg g band Peak model surface brightness
above the background (G1)
414- 425 E12.6 deg AWorldg g band Isophotal major axis (G1)
427- 438 E12.6 deg e_AWorldg g band Isophotal major axis
error (G1)
440- 451 E12.6 deg BWorldg g band Isophotal minor axis (G1)
453- 464 E12.6 deg e_BWorldg g band Isophotal minor axis
error (G1)
466- 470 F5.3 --- Elongg g band Elongation
(major/minor axis) (G1)
472- 477 F6.2 deg thetaWorldg g band Isophotal position angle (G1)
479- 483 F5.3 pix FluxRadg g band Radius containing 50%
of the light (G1)
485- 488 F4.2 --- KronRadg g band Kron radius (G1)
490- 493 F4.2 --- PetroRadg g band Petrosian radius (G1)
495- 499 F5.2 pix FWHMImgg g band Source FWHM (G1)
501- 502 I2 --- Flagsg g band SExtractor flags (G1)
504- 508 F5.3 --- ClassStarg g band SExtractor star/galaxy
classifier (G1)
510- 515 I6 --- Seqr r band SExtractor Number
517- 527 F11.7 deg RArdeg r band Right Ascension (J2000)
529- 539 F11.7 deg DErdeg r band Declination (J2000)
541- 550 F10.4 pix Ximgr r band X position
552- 561 F10.4 pix Yimgr r band Y position
563- 569 F7.4 mag magAutor r band Automated magnitude (G1)
571- 576 F6.4 mag e_magAutor r band Error on automated
magnitude (G1)
578- 584 F7.4 mag magAperr r band Aperture magnitude
within 4 pixels diameter (G1)
586- 592 F7.4 mag magAper1r r band Aperture magnitude
within 6 pixels diameter (G1)
594- 600 F7.4 mag magAper2r r band Aperture magnitude
within 8 pixels diameter (G1)
602- 608 F7.4 mag magAper3r r band Aperture magnitude
within 19.04 pixels diameter (G1)
610- 616 F7.4 mag magAper4r r band Aperture magnitude
within 32 pixels diameter (G1)
618- 623 F6.4 mag e_magAperr r band Aperture magnitude error
within 4 pixels diameter (G1)
625- 630 F6.4 mag e_magAper1r r band Aperture magnitude error
within 6 pixels diameter (G1)
632- 637 F6.4 mag e_magAper2r r band Aperture magnitude error
within 8 pixels diameter (G1)
639- 645 F7.4 mag e_magAper3r r band Aperture magnitude error
within 19.04 pixels diameter (G1)
647- 653 F7.4 mag e_magAper4r r band Aperture magnitude error
within 32 pixels diameter (G1)
655- 661 F7.4 mag/arcsec2 muMaxr r band Peak model surface brightness
above the background (G1)
663- 674 E12.6 deg AWorldr r band Isophotal major axis (G1)
676- 687 E12.6 deg e_AWorldr r band Isophotal major axis
error (G1)
689- 700 E12.6 deg BWorldr r band Isophotal minor axis (G1)
702- 713 E12.6 deg e_BWorldr r band Isophotal minor axis
error (G1)
715- 719 F5.3 --- Elongr r band Elongation
(major/minor axis) (G1)
721- 726 F6.2 deg thetaWorldr r band Isophotal position angle (G1)
728- 732 F5.3 pix FluxRadr r band Radius containing 50%
of the light (G1)
734- 737 F4.2 --- KronRadr r band Kron radius (G1)
739- 742 F4.2 --- PetroRadr r band Petrosian radius (G1)
744- 747 F4.2 pix FWHMImgr r band Source FWHM (G1)
749 I1 --- Flagsr r band SExtractor flags (G1)
751- 755 F5.3 --- ClassStarr r band SExtractor star/galaxy
classifier (G1)
757- 762 I6 --- Seqi i band SExtractor Number
764- 774 F11.7 deg RAideg i band Right Ascension (J2000)
776- 786 F11.7 deg DEideg i band Declination (J2000)
788- 797 F10.4 pix Ximgi i band X position
799- 808 F10.4 pix Yimgi i band Y position
810- 816 F7.4 mag magAutoi i band Automated magnitude (G1)
818- 823 F6.4 mag e_magAutoi i band Error on automated
magnitude (G1)
825- 831 F7.4 mag magAperi i band Aperture magnitude
within 4 pixels diameter (G1)
833- 839 F7.4 mag magAper1i i band Aperture magnitude
within 6 pixels diameter (G1)
841- 847 F7.4 mag magAper2i i band Aperture magnitude
within 8 pixels diameter (G1)
849- 855 F7.4 mag magAper3i i band Aperture magnitude
within 19.04 pixels diameter (G1)
857- 863 F7.4 mag magAper4i i band Aperture magnitude
within 32 pixels diameter (G1)
865- 870 F6.4 mag e_magAperi i band Aperture magnitude error
within 4 pixels diameter (G1)
872- 877 F6.4 mag e_magAper1i i band Aperture magnitude error
within 6 pixels diameter (G1)
879- 884 F6.4 mag e_magAper2i i band Aperture magnitude error
within 8 pixels diameter (G1)
886- 892 F7.4 mag e_magAper3i i band Aperture magnitude error
within 19.04 pixels diameter (G1)
894- 900 F7.4 mag e_magAper4i i band Aperture magnitude error
within 32 pixels diameter (G1)
902- 908 F7.4 mag/arcsec2 muMaxi i band Peak model surface brightness
above the background (G1)
910- 921 E12.6 deg AWorldi i band Isophotal major axis (G1)
923- 934 E12.6 deg e_AWorldi i band Isophotal major axis
error (G1)
936- 947 E12.6 deg BWorldi i band Isophotal minor axis (G1)
949- 960 E12.6 deg e_BWorldi i band Isophotal minor axis
error (G1)
962- 966 F5.3 --- Elongi i band Elongation
(major/minor axis) (G1)
968- 973 F6.2 deg thetaWorldi i band Isophotal position angle (G1)
975- 979 F5.3 pix FluxRadi i band Radius containing 50%
of the light (G1)
981- 984 F4.2 --- KronRadi i band Kron radius (G1)
986- 989 F4.2 --- PetroRadi i band Petrosian radius (G1)
991- 995 F5.2 pix FWHMImgi i band Source FWHM (G1)
997 I1 --- Flagsi i band SExtractor flags (G1)
999-1003 F5.3 --- ClassStari i band SExtractor star/galaxy
classifier (G1)
1005-1011 F7.4 mag umag u band magnitude
1013-1018 F6.4 mag e_umag u band magnitude error
1020-1026 F7.4 mag gmag g band magnitude
1028-1033 F6.4 mag e_gmag g band magnitude error
1035-1041 F7.4 mag rmag r band magnitude
1043-1048 F6.4 mag e_rmag r band magnitude error
1050-1056 F7.4 mag imag i band magnitude
1058-1063 F6.4 mag e_imag i band magnitude error
1065-1073 F9.6 mag CIu u band Concentration index,
magAper2u-magAperu
1075-1083 F9.6 mag CIg g band Concentration index,
magAper2g-magAperg
1085-1093 F9.6 mag CIr r band Concentration index,
magAper2r-magAperr
1095-1103 F9.6 mag CIi i band Concentration index,
magAper2i-magAperi
1105-1110 F6.4 mag E(B-V) Reddening from Schlafly &
Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S)
1112-1117 F6.4 mag e_E(B-V) Reddening error from Schlafly &
Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: gcc_gri.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- Seqg g band SExtractor Number
8- 18 F11.7 deg RAgdeg g band Right Ascension (J2000)
20- 30 F11.7 deg DEgdeg g band Declination (J2000)
32- 41 F10.4 pix Ximgg g band X position
43- 52 F10.4 pix Yimgg g band Y position
54- 60 F7.4 mag magAutog g band Automated magnitude (G1)
62- 67 F6.4 mag e_magAutog g band Error on automated
magnitude (G1)
69- 75 F7.4 mag magAperg g band Aperture magnitude
within 4 pixels diameter (G1)
77- 83 F7.4 mag magAper1g g band Aperture magnitude
within 6 pixels diameter (G1)
85- 91 F7.4 mag magAper2g g band Aperture magnitude
within 8 pixels diameter (G1)
93- 99 F7.4 mag magAper3g g band Aperture magnitude
within 19.04 pixels diameter (G1)
101-107 F7.4 mag magAper4g g band Aperture magnitude
within 32 pixels diameter (G1)
109-114 F6.4 mag e_magAperg g band Aperture magnitude error
within 4 pixels diameter (G1)
116-121 F6.4 mag e_magAper1g g band Aperture magnitude error
within 6 pixels diameter (G1)
123-128 F6.4 mag e_magAper2g g band Aperture magnitude error
within 8 pixels diameter (G1)
130-136 F7.4 mag e_magAper3g g band Aperture magnitude error
within 19.04 pixels diameter (G1)
138-145 F8.4 mag e_magAper4g g band Aperture magnitude error
within 32 pixels diameter (G1)
147-153 F7.4 mag/arcsec2 muMaxg g band Peak model surface brightness
above the background (G1)
155-166 E12.6 deg AWorldg g band Isophotal major axis (G1)
168-179 E12.6 deg e_AWorldg g band Isophotal major axis error (G1)
181-192 E12.6 deg BWorldg g band Isophotal minor axis (G1)
194-205 E12.6 deg e_BWorldg g band Isophotal minor axis error (G1)
207-211 F5.3 --- Elongg g band Elongation
(major/minor axis) (G1)
213-222 F10.6 deg thetaWorldg g band Isophotal position angle (G1)
224-228 F5.3 pix FluxRadg g band Radius containing 50%
of the light (G1)
230-234 F5.2 --- KronRadg g band Kron radius (G1)
236-244 F9.6 --- PetroRadg g band Petrosian radius (G1)
246-255 F10.6 pix FWHMImgg g band Source FWHM (G1)
257-258 I2 --- Flagsg g band SExtractor flags (G1)
260-267 F8.6 --- ClassStarg g band SExtractor star/galaxy
classifier (G1)
269-274 I6 --- Seqr r band SExtractor Number
276-286 F11.7 deg RArdeg r band Right Ascension (J2000)
288-298 F11.7 deg DErdeg r band Declination (J2000)
300-309 F10.4 pix Ximgr r band X position
311-320 F10.4 pix Yimgr r band Y position
322-328 F7.4 mag magAutor r band Automated magnitude (G1)
330-335 F6.4 mag e_magAutor r band Error on automated
magnitude (G1)
337-343 F7.4 mag magAperr r band Aperture magnitude
within 4 pixels diameter (G1)
345-351 F7.4 mag magAper1r r band Aperture magnitude
within 6 pixels diameter (G1)
353-374 D22.15 mag magAper2r r band Aperture magnitude
within 8 pixels diameter (G1)
376-382 F7.4 mag magAper3r r band Aperture magnitude
within 19.04 pixels diameter (G1)
384-390 F7.4 mag magAper4r r band Aperture magnitude
within 32 pixels diameter (G1)
392-397 F6.4 mag e_magAperr r band Aperture magnitude error
within 4 pixels diameter (G1)
399-404 F6.4 mag e_magAper1r r band Aperture magnitude error
within 6 pixels diameter (G1)
406-411 F6.4 mag e_magAper2r r band Aperture magnitude error
within 8 pixels diameter (G1)
413-419 F7.4 mag e_magAper3r r band Aperture magnitude error
within 19.04 pixels diameter (G1)
421-428 F8.4 mag e_magAper4r r band Aperture magnitude error
within 32 pixels diameter (G1)
430-436 F7.4 mag/arcsec2 muMaxr r band Peak model surface brightness
above the background (G1)
438-449 E12.6 deg AWorldr r band Isophotal major axis (G1)
451-462 E12.6 deg e_AWorldr r band Isophotal major axis error (G1)
464-475 E12.6 deg BWorldr r band Isophotal minor axis (G1)
477-488 E12.6 deg e_BWorldr r band Isophotal minor axis error (G1)
490-494 F5.3 --- Elongr r band Elongation
(major/minor axis) (G1)
496-505 F10.6 deg thetaWorldr r band Isophotal position angle (G1)
507-511 F5.3 pix FluxRadr r band Radius containing 50%
of the light (G1)
513-516 F4.2 --- KronRadr r band Kron radius (G1)
518-522 F5.2 --- PetroRadr r band Petrosian radius (G1)
524-527 F4.2 pix FWHMImgr r band Source FWHM (G1)
529 I1 --- Flagsr r band SExtractor flags (G1)
531-538 F8.6 --- ClassStarr r band SExtractor star/galaxy
classifier (G1)
540-545 I6 --- Seqi i band SExtractor Number
547-557 F11.7 deg RAideg i band Right Ascension (J2000)
559-569 F11.7 deg DEideg i band Declination (J2000)
571-580 F10.4 pix Ximgi i band X position
582-591 F10.4 pix Yimgi i band Y position
593-599 F7.4 mag magAutoi i band Automated magnitude (G1)
601-606 F6.4 mag e_magAutoi i band Error on automated
magnitude (G1)
608-614 F7.4 mag magAperi i band Aperture magnitude
within 4 pixels diameter (G1)
616-622 F7.4 mag magAper1i i band Aperture magnitude
within 6 pixels diameter (G1)
624-630 F7.4 mag magAper2i i band Aperture magnitude
within 8 pixels diameter (G1)
632-638 F7.4 mag magAper3i i band Aperture magnitude
within 19.04 pixels diameter (G1)
640-646 F7.4 mag magAper4i i band Aperture magnitude
within 32 pixels diameter (G1)
648-653 F6.4 mag e_magAperi i band Aperture magnitude error
within 4 pixels diameter (G1)
655-660 F6.4 mag e_magAper1i i band Aperture magnitude error
within 6 pixels diameter (G1)
662-667 F6.4 mag e_magAper2i i band Aperture magnitude error
within 8 pixels diameter (G1)
669-677 F9.4 mag e_magAper3i i band Aperture magnitude error
within 19.04 pixels diameter (G1)
679-686 F8.4 mag e_magAper4i i band Aperture magnitude error
within 32 pixels diameter (G1)
688-694 F7.4 mag/arcsec2 muMaxi i band Peak model surface brightness
above the background (G1)
696-707 E12.6 deg AWorldi i band Isophotal major axis (G1)
709-720 E12.6 deg e_AWorldi i band Isophotal major axis error (G1)
722-733 E12.6 deg BWorldi i band Isophotal minor axis (G1)
735-746 E12.6 deg e_BWorldi i band Isophotal minor axis error (G1)
748-752 F5.3 --- Elongi i band Elongation
(major/minor axis) (G1)
754-759 F6.2 deg thetaWorldi i band Isophotal position angle (G1)
761-765 F5.3 pix FluxRadi i band Radius containing 50%
of the light (G1)
767-774 F8.6 --- KronRadi i band Kron radius (G1)
776-784 F9.6 --- PetroRadi i band Petrosian radius (G1)
786-795 F10.6 pix FWHMImgi i band Source FWHM (G1)
797 I1 --- Flagsi i band SExtractor flags (G1)
799-806 F8.6 --- ClassStari i band SExtractor star/galaxy
classifier (G1)
808-816 F9.6 mag gmag g band magnitude
818-826 F9.7 mag e_gmag g band magnitude error
828-836 F9.6 mag rmag r band magnitude
838-846 F9.7 mag e_rmag r band magnitude error
848-856 F9.6 mag imag i band magnitude
858-866 F9.7 mag e_imag i band magnitude error
868-876 F9.6 mag CIg g band Concentration index,
magAper2g-magAperg
878-886 F9.6 mag CIr r band Concentration index,
magAper2r-magAperr
888-896 F9.6 mag CIi i band Concentration index,
magAper2i-magAperi
898-903 F6.4 mag E(B-V) Reddening from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S)
905-910 F6.4 mag e_E(B-V) Reddening error from Schlafly &
Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: cat_u.dat cat_g.dat cat_r.dat cat_i.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Band [ugri] Band of the catalog
3- 8 I6 - Seq SExtractor Number
10- 20 F11.7 deg RAdeg Right Ascension (J2000)
22- 32 F11.7 deg DEdeg Declination (J2000)
34- 43 F10.4 pix Ximg X position
45- 54 F10.4 pix Yimg Y position
56- 62 F7.4 mag magAuto ?=99 Automated magnitude (G1)
64- 71 F8.4 mag e_magAuto ?=99 Error on automated magnitude (G1)
73- 79 F7.4 mag magAper ?=99 Aperture magnitude within
4 pixels diameter (G1)
81- 87 F7.4 mag magAper1 ?=99 Aperture magnitude within
6 pixels diameter (G1)
89- 95 F7.4 mag magAper2 ?=99 Aperture magnitude within
8 pixels diameter (G1)
97-103 F7.4 mag magAper3 ?=99 Aperture magnitude within
19.04 pixels diameter (G1)
105-111 F7.4 mag magAper4 ?=99 Aperture magnitude within
32 pixels diameter (G1)
113-119 F7.4 mag e_magAper ?=99 Aperture magnitude error within
4 pixels diameter (G1)
121-127 F7.4 mag e_magAper1 ?=99 Aperture magnitude error within
6 pixels diameter (G1)
129-136 F8.4 mag e_magAper2 ?=99 Aperture magnitude error within
8 pixels diameter (G1)
138-147 F10.4 mag e_magAper3 ?=99 Aperture magnitude error within
19.04 pixels diameter (G1)
149-158 F10.4 mag e_magAper4 ?=99 Aperture magnitude error within
32 pixels diameter (G1)
160-166 F7.4 mag/arcsec2 muMax ?=99 Peak model surface brightness above
the background (G1)
168-179 E12.6 deg AWorld Isophotal major axis (G1)
181-192 E12.6 deg e_AWorld Isophotal major axis error (G1)
194-205 E12.6 deg BWorld Isophotal minor axis (G1)
207-218 E12.6 deg e_BWorld Isophotal minor axis error (G1)
220-228 F9.3 - Elong Elongation (major/minor axis) (G1)
230-239 F10.6 deg thetaWorld Isophotal position angle (G1)
241-251 F11.3 pix FluxRad Radius containing 50'%' of the light (G1)
253-261 F9.6 - KronRad Kron radius (G1)
263-271 F9.6 - PetroRad Petrosian radius (G1)
273-283 F11.6 pix FWHMImg Source FWHM (G1)
285-286 I2 - Flags SExtractor flags (G1)
288-295 F8.6 - ClassStar SExtractor star/galaxy classifier (G1)
297-305 F9.6 mag mag ?=99 Magnitude in Band
307-316 F10.6 mag e_mag ?=99 Magnitude error in Band error
318-327 F10.6 mag CI Concentration index, magAper2-magAper
329-334 F6.4 mag E(B-V) Reddening from Schlafly & Finkbeiner
(2011ApJ...737..103S 2011ApJ...737..103S)
336-341 F6.4 mag e_E(B-V) Reddening error from Schlafly &
Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S)
--------------------------------------------------------------------------------
Global notes:
Note (G1): For details see the official SExtractor manual,
Bertin & Arnouts, 1996A&AS..117..393B 1996A&AS..117..393B
--------------------------------------------------------------------------------
History:
From Marco Mirabile, marco.mirabile(a)inaf.it
Acknowledgements:
This work is based on visitor mode observations collected at the
European Southern Observatory (ESO) La Silla Paranal Observatory
within the VST Guaranteed Time Observations, Programme ID:
097.B-0806(A). MM acknowledges financial support from the INAF-OAAb,
INFN institute of Naples, the University of Naples Federico II and the
VST project (P.I. P. Schipani). EI, MS, MC acknowledges support by
Italian Ministry for Education University and Research (MIUR) grant
PRIN 2022 2022383WFT 'SUNRISE', CUP C53D23000850006, and by the
VST funds. EI, MS, MC and RH acknowledge funding from the Italian
National Institute of Astrophysics (INAF) through large grant PRIN
12-2022 "INAF-EDGE" (PI L. Hunt). This research has made use of the
NASA/IPAC Extragalac- tic Database (NED), which is funded by the
National Aeronautics and Space Administration and operated by the
California Institute of Technology. We also acknowledge the usage of
the Extragalactic Distance Database (EDD, https://edd.
ifa.hawaii.edu/). We made extensive use of the softwares of SExtractor
(Bertin & Arnouts 1996) and Topcat
(https://www.star.bris.ac.uk/~mbt/topcat/; Taylor 2005)). This
research has made use of the VizieR catalogue access tool, CDS,
Strasbourg, France (Ochsenbein 1996). The original description of the
VizieR service was published in Ochsenbein et al. (2000). This
research has made use of the SDSS database www.sdss. org. Funding for
the Sloan Digital Sky Survey V has been provided by the Alfred P.
Sloan Foundation, the Heising Simons Foundation, the National Science
Foundation, and the Participat- ing Institutions. SDSS acknowledges
support and resources from the Center for High-Performance Computing
at the University of Utah. SDSS telescopes are located at Apache Point
Observatory, funded by the Astrophysical Research Consortium and
operated by New Mexico State University, and at Las Campanas
Observatory, operated by the Carnegie Institution for Science. This
work made use of Astropy (http://www.astropy.org) a
community-developed core Python package and an ecosystem of tools and
resources for astronomy (Astropy Collaboration et al. 2013, 2018,
2022)
(End) Patricia Vannier [CDS] 02-Aug-2024