J/PASP/132/E4301ivo://CDS.VizieR/J/PASP/132/E4301doi:10.26093/cds/vizier.61333301CDSPari J.Hora J.L.2025-09-09T14:15:04Z2020-11-20T09:45:31ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmolecular-cloudsinfrared-sourcesgalaxy-classification-systemsThe field of computer vision has greatly matured in the past decade, and many of the methods and techniques can be useful for astronomical applications. One example is in searching large imaging surveys for objects of interest, especially when it is difficult to specify the characteristics of the objects being searched for. We have developed a method using contour finding and convolution neural networks (CNNs) to search for Infrared Dark Clouds (IRDCs) in the Spitzer Galactic plane survey data. IRDCs can vary in size, shape, orientation, and optical depth, and are often located near regions with complex emission from molecular clouds and star formation, which can make the IRDCs difficult to reliably identify. False positives can occur in regions where emission is absent, rather than from a foreground IRDC. The contour finding algorithm we implemented found most closed figures in the mosaic and we developed rules to filter out some of the false positive before allowing the CNNs to analyze them. The method was applied to the Spitzer data in the Galactic plane surveys, and we have constructed a catalog of IRDCs which includes additional parts of the Galactic plane that were not included in earlier surveys.2020PASP..132e4301Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/PASP/132/E4301CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/505/405 : A catalogue of Spitzer dark clouds (Peretto+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/PASP/132/E4301https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/PASP/132/E4301http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/PASP/132/E4301https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/PASP/132/E4301https://vizier.iucaa.in/viz-bin/votable?-source=J/PASP/132/E4301http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/PASP/132/E4301GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/PASP/132/E4301/table2 (IRDC Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/PASP/132/E4301/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/PASP/132/E4301/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/PASP/132/E4301/table2?GETtext/xml+votable180.050000true266.142634-28.7844220.0055555555555555564/897 5/825 912 3242 3579 3584-3585 3606-3607 3612-3613 3650-3651 3655-3657 3660-3661 3666-3667 3670 3672-3674 3676-3677 3848 3852 3858 3909 7201-7204 7206-7207 7209 7218-7219 7224-7225 7228-7230 7272 7274-7275 7278 7376-7378 7380 7383 7554 7560-7561 7563-7564 7566-7567 7578-7579 7601 7604-7605 7650-7651 7654 7660-7661 7672 7674-7675 7678-7679 8021 9333 9335 9341 9430 9473 9475 9480 9482 9504 10399 10413-10414 10417-10420 10439 10441-10442 10444 10450-10453 10539 10542-10543 10551-10553 10556 10594-10595 10597-10599 10608-10609 10612 10614-10615 10624 10753-10754 6/1298-1299 1830 1922 1929 3060-3061 3066-3067 3271 3279 3290 3305 3307-3308 3310 3312 3614 3631 3640 3652 3657 3715 3719 3724 3726 3744 12974 12986 14271 14310-14311 14313-14315 14321-14322 14324 14328 14344-14345 14348-14349 14351 14388 14400 14403 14407 14409-14411 14413-14415 14432-14433 14436-14437 14461 14617-14619 14636-14637 14648-14649 14651-14653 14659 14662-14663 14687 14700-14702 14712-14713 15370 15374-15375 15387-15389 15396-15398 15412-15413 15415 15436 15438-15439 15449 15454-15456 15622-15625 15632-15634 15680-15681 15683-15684 20821 21538 21646-21647 21683 22045 22243 22246-22247 22249 23969 24506 28718-28719 28730 28733-28734 28779 28802-28803 28820 28822-28823 28832-28834 28845 28848-28849 28851-28853 28855 28857 28861-28862 28865 28867 28870-28871 28888 28890-28892 28894 28904-28905 28907-28909 28911 28924-28925 28927 29067 29070 29092 29094-29095 29116 29118-29119 29162-29163 29265 29440-29441 29456-29457 29460-29461 29463 29516-29517 29526-29529 29531 29557 30211 30222-30223 30238-30239 30248-30249 30260 30262-30263 30306-30307 30328 30330-30331 30334 30353 30357 30400-30401 30403 30424-30425 30428-30429 30431 30592 30594-30595 30598-30599 30622-30625 30628-30629 30631 30652-30653 30692 30694-30695 30706-30707 32068-32069 32080-32081 32083 37245 37247 37339 37361 37363 37369 37371-37374 37713 37715-37716 37744-37745 37752 37829 37831 37837 37839-37840 37861 37863 37871-37872 37897-37899 37904-37906 37908 37912 37924-37926 37932 37934 38024 38026 39236-39238 39245-39246 39250-39251 39256 39258 39268 39271 39275-39277 39282 39366 39374 39386 39397 39399 39407 39762 41470-41471 41591 41594-41595 41630-41631 41645-41647 41649-41651 41660-41662 41667 41684-41686 41688-41689 41696-41698 41743 41754-41755 41761-41763 41772-41773 41780-41782 41784 41795 41797-41799 41816-41817 41820 41824-41825 42153-42155 42162-42163 42166-42167 42190-42191 42201-42203 42216-42218 42220-42222 42228-42230 42303 42371 42374-42375 42385-42387 42400-42401 42404 42417 42420 42440-42441 42443-42445 42447 42454-42455 42469-42470 42480 42500-42502 42508 42512-42513 43011 43020-43022 43024 43026 43040-43042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/PASP/132/E4301?format=asciiOpticalInfrareddefaultJ/PASP/132/E4301/table2IRDC CatalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIRDC name, GLLL.ll+BB.bbb)meta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonindexedGLATGalactic latitudedegpos.galactic.latindexedSize(GLON)Size (GLON)arcsecphys.angSizefloatSize(GLAT)Size (GLAT)arcsecphys.angSizefloatDepthRatioDepth ratio (1)stat.fit.paramfloatProbProbability of IRDCstat.probabilityfloatAreaContour Area of IRDCphys.angSizeintPF09[0/28]? Number of PF09 objects inside IRDC (2)meta.numberintnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed