#SExtractor

[sklogw]

i want you guys to know that there's an image processing software used in astronomy called SExtractor (Source Extractor), and people are always talking about sextractor this, sextractor that

[seedyjahateh]

Research Day 32, Blog 30

Title: Article Review: An Improved Method for Object Detection in Astronomical Images

Introduction: This post provides a brief review of the article titled "An improved method for object detection in astronomical images," which was the focus of our learning on Tuesday, June 27. The article presents an enhanced approach for detecting galaxies and stars in astronomical images, highlighting improvements in accuracy and the detection of faint objects.

Summary of the Article: The article introduces an advanced method for detecting objects of interest in astronomical images. The approach involves a global detection scheme followed by a refined detection procedure using watershed segmentation to divide the image into irregular sub-regions. Adaptive noise reduction and a layered strategy are applied to detect bright and faint objects. Additionally, a multi-threshold technique is employed to separate blended objects. The method demonstrates superior performance compared to SEXTRACTOR, achieving higher true detection rates (91% versus 83%) and improved detection of very faint objects, up to 2 magnitudes fainter than SEXTRACTOR.

Relevance to Individual Research: While the previous day was dedicated to reading about source detection approaches, this article is an updated version of the previous one. It helped us gain a broader understanding of our research project "Counting Objects in Astronomical Photographs". The insights from this article can provide valuable guidance for enhancing the accuracy and effectiveness of my image segmentation algorithm.

Conclusion: The article "An improved method for object detection in astronomical images" introduces a refined approach that enhances the detection of galaxies and stars in astronomical images. The combination of global detection, watershed segmentation, adaptive noise reduction, layered strategy, and multi-threshold technique improves object detection accuracy. The relevance of this article to our ongoing image segmentation project highlights the importance of incorporating advanced techniques to enhance the efficiency and precision of our research endeavors.

[techniktagebuch]

Oktober 2022

Yak-Shaving für Astronomen

Als Yak-Shaving bezeichnet man iterative Prozesse, bei denen man, um ein Problem zu lösen, immer erst ein anderes Problem vorher lösen muss, das wiederum die Lösung von noch einem anderen Problem erfordert, und so weiter. Mein Ausgangsproblem: Ich habe ein Bild aus einem Teleskop und will einen Katalog der Sterne in diesem Bild machen. Dafür gibt es eine Reihe von vorgefertigten Programmen, ich muss das nicht selbst programmieren. Eines der gebräuchlichsten heißt “SExtractor”, kurz für “Source Extractor”, und, ja, der Scherz war vermutlich mal für drei Minuten lustig, damals, als SExtractor das Licht der Welt erblickte, also circa im Jahr 2000. Ich habe genau dieses Programm schon damals verwendet, es war mit Abstand am einfachsten und schnellsten für diese Aufgabe. 

Aber damals hatte ich auch noch einen Linux-Computer, der von einem IT-Experten gewartet wurde. Die Software-Installation beschränkte sich für mich darauf, eine Email an diesen Experten zu schicken. So war es auch 2005, als ich meinen ersten richtigen Job antrat, und auch 2007, beim zweiten: Ich bestellte beim Arbeitgeber einen neuen Rechner, und sagte gleich dazu, welche Software ich benötige, fertig. Diese Zeiten sind vorbei, heute sind wir alle System-Administratoren und Software-Yak-Shaver. Astronomie machen wir auch noch.

Mittlerweile ist SExtractor in der Version 2.19.5, und existiert nur als Quellcode, wie so oft bei Spezialsoftware für Astronomen. Man kann es aber einfach auf jedem Rechner kompilieren, der Linux-kompatibel ist, also theoretisch auch auf Macs, solange alle nötigen Libraries schon da sind. Sind sie natürlich bei mir nicht. Diese “Dependencies”, also Software, die andere Software voraussetzt, die wieder andere Software voraussetzt, die Versoftwarung von Yak-Shaving, sind ein generelles Problem unseres Software-Ökosystems, und jeden Tag huldige ich Programmen, die einfach so laufen. Topcat! DS9! Seid umarmt. Zum Glück gibt es zum Management dieser Dependencies wieder andere Software. Ich erfahre von Macports, das nach der Installation auch beinahe sofort läuft, und Macports weiß schon, wie man SExtractor installiert. Eine Weile geht alles gut.

Dann teilt mir Macports mit, das es noch eine vollständige Installation von XCode benötigt. XCode gibt es beim Apple Store, und es dauert auch nur eine Viertelstunde, bis ich dort Zugriff habe – der Account zeigt auf eine uralte Emailaddresse, und die Sicherheitsfragen sind verwirrend. Mein erster Lehrer? Wer sollte das gewesen sein? Dann finde ich heraus, dass die angebotene Version von XCode nur auf einem Betriebssystem läuft, das ein paar Versionen jünger ist als meines. Jetzt gibt es zwei Möglichkeiten: Entweder das Betriebssystem auf den neuesten Stand bringen, was zur Folge haben wird, das diverse andere Software auch neu installiert werden muss, und eventuell nicht mehr geht. Oder einen Developer-Account kaufen, und damit Zugriff auf alte XCode-Versionen zu haben. Beides rote Linien in meiner Yak-Shaving-Philosophie.

Oder aber das ursprüngliche Problem mit einer ganz anderen Software lösen. Oder es überhaupt nicht lösen, ein viel zu selten benutzter Problembewältigungsansatz.

(Aleks Scholz)

[icelandofficial]

All of the complications with the telescipe software have veen giving me so much anxiety about the thing that im supposed to enjoy doing (observing), and its been taking so long to get data for so many reasons, senior project is really just :/ worried about getting it all done on time

[psy-ay-ay]

just read SExtractor in an observational astronomy paper; i swear to god someone is taking piss out there

[hansfallada]

i just hate that they called the Source Extractor software i'm working with SExtractor. like why would you put the word sex in there :/

[sosadominic91-blog]

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[wangsebastian-blog]

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[averymackenzie89-blog]

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[georgecase1990-blog]

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[easyastrobox]

Mise à jour du 13/05/2020

Ci-dessous une liste des dernières modifications apportées au projet Easy Astro Box :

Mise à jour de la distribution.

Mise à jour de l'application CCDCiel.

Mise à jour de l'application Cartes du Ciel.

Mise à jour de la section Téléchargements.

Mise à jour des manuels d'installation.

Correction du raccourci de l'application Lin Guider.

Correction d'un problème de sauvegarde des paramètres Indi.

Ajout de la collection Astropy.

Ajout de la collection AstrOmatic.

Ajout du framework Indigo.

AstrOmatic :

La suite logicielle AstrOmatic comprend actuellement les packages suivants :

EyE

MissFITS

PSFEx

SCAMP

SExtractor

SkyMaker

STIFF

Stuff

SWarp

VisiOmatic

WeightWatcher

AstroPy :

Astropy est une collection de progiciels écrits dans le langage de programmation Python et conçu pour une utilisation en astronomie.

Indigo :

Indigo est un framework pour le développement de logiciels d'astronomie multiplateforme conçu pour s'adapter à vos besoins.

Nouveau système de mises à jour :

N'oubliez pas de taper la commande eab_update via la console SSH ou bien double cliquez sur l'icône Mise à jour EasyAstroBox.

[scottxrt]

Publicaciones científicas chilenas con más citas en Web of Science

New Post has been published on http://scottxrt.com/publicaciones-cientificas-chilenas-mas-citas-web-of-science

Publicaciones científicas chilenas con más citas en Web of Science

PT TITULO INSTITUCIONES CHILENAS CITAS PY AREA DE INVESTIGACION UT J Observational evidence from supernovae for an accelerating universe and a cosmological constant Observatorio Interamericano Cerro Tololo, Pontificia Universidad Católica de Chile 8052 1998 Astronomy & Astrophysics WOS:000076040700001 J Measurements of Omega and Lambda from 42 high-redshift supernovae Observatorio Europeo Austral 7480 1999 Astronomy & Astrophysics WOS:000081011700004 J SExtractor: Software for source extraction Observatorio Europeo Austral 4919 1996 Astronomy & Astrophysics WOS:A1996UQ73000014 J Three-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: Implications for cosmology Observatorio Interamericano Cerro Tololo 4048 2007 Astronomy & Astrophysics WOS:000247242100004 J Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC [Cossart, Pascale] Pontificia Universidad Católica de Chile; [Coxon, Fraser P.] Universidad de Valparaíso; [Garcia, Lorena; Lavandero, Sergio; Diaz-Araya, Guillermo; Hetz, Claudio] Universidad de Chile. 3016 2012 Astronomy & Astrophysics; Physics WOS:000309621400001 J Biodiversity – Global biodiversity scenarios for the year 2100 Universidad de Chile 2831 2000 Science & Technology – Other Topics WOS:000085775300030 J CORPORATE FINANCING AND INVESTMENT DECISIONS WHEN FIRMS HAVE INFORMATION THAT INVESTORS DO NOT HAVE Pontificia Universidad Catolica de Chile 2687 1984 Business & Economics WOS:A1984TA97500002 J Planck 2013 results. XVI. Cosmological parameters [Kneissl, R.], Atacama Large Millimeter Array 2577 2014 Astronomy & Astrophysics WOS:000345282600027 J PREVALENCE OF HUMAN PAPILLOMAVIRUS IN CERVICAL-CANCER – A WORLDWIDE PERSPECTIVE Hospital Clinico Dr Guillermo Grant Benavente 2239 1995 Oncology WOS:A1995RA84300009 J THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY [Schreiber, Matthias R.], Universidad de Valparaiso 2182 2009 Astronomy & Astrophysics WOS:000266286700004 J Worldwide variation in prevalence of symptoms of asthma, allergic rhinoconjunctivitis, and atopic eczema: ISAAC Universidad de Santiago de Chile 2051 1998 General & Internal Medicine WOS:000073283600007 J The brainweb: Phase synchronization and large-scale integration Pontificia Universidad Catolica de Chile 1951 2001 Neurosciences & Neurology WOS:000167928300014 J CLASSIFICATION PARAMETERS FOR THE EMISSION-LINE SPECTRA OF EXTRA-GALACTIC OBJECTS Observatorio Interamericano Cerro Tololo 1909 1981 Astronomy & Astrophysics WOS:A1981LM43000001 J The worldwide leaf economics spectrum Universidad de Concepcion 1891 2004 Science & Technology – Other Topics WOS:000220952300031 J BLACK-HOLE IN 3-DIMENSIONAL SPACETIME Universidad de Chile 1667 1992 Physics WOS:A1992JP85900005 J Sloan Digital Sky Survey: Early data release Universidad de Chile, Pontificia Universidad Catolica de Chile 1631 2002 Astronomy & Astrophysics WOS:000173767400039 J Multilevel inverters: A survey of topologies, controls, and applications Universidad Tecnica Federico Santa Maria 1612 2002 Automation & Control Systems; Engineering; Instruments & Instrumentation WOS:000177191000002 J The Supernova Legacy Survey: measurement of Omega(M), Omega(Lambda) and w from the first year data set Observatorio Europeo Austral 1601 2006 Astronomy & Astrophysics WOS:000234957400004 J EFFECT OF ORAL ALENDRONATE ON BONE-MINERAL DENSITY AND THE INCIDENCE OF FRACTURES IN POSTMENOPAUSAL OSTEOPOROSIS Pontificia Universidad Catolica de Chile 1583 1995 General & Internal Medicine WOS:A1995TG44500001 J A comparative risk assessment of burden of disease and injury attributable to 67 risk factors and risk factor clusters in 21 regions, 1990-2010: a systematic analysis for the Global Burden of Disease Study 2010 [Rodriguez-Portales, Jose A.], Pontificia Universidad Catolica de Chile 1519 2012 General & Internal Medicine WOS:000312387000017 J Discovery of a supernova explosion at half the age of the Universe Observatorio Europeo Austral 1432 1998 Science & Technology – Other Topics WOS:000071326100043 J The host galaxies of active galactic nuclei Pontificia Universidad Catolica de Chile 1343 2003 Astronomy & Astrophysics WOS:000187256700007 J The TIMI risk score for unstable angina/non-ST elevation MI – A method for prognostication and therapeutic decision making Pontificia Universidad Catolica de Chile 1331 2000 General & Internal Medicine WOS:000088654400025 J Guidelines for the use and interpretation of assays for monitoring autophagy [Cossart, Pascale] Pontificia Universidad Católica de Chile;  [Coxon, Fraser P.] Universidad de Valparaíso; [Diaz-Araya, Guillermo; Garcia, Lorena; Lavandero, Sergio; Hetz, Claudio] Universidad de Chile. 1214 2012 Cell Biology WOS:000305403400002 J Cosmological results from high-z supernovae Observatorio Interamericano Cerro Tololo, Pontificia Universidad Catolica de Chile, Observatorio Las Campanas. 1196 2003 Astronomy & Astrophysics WOS:000185087400001 J An unusual supernova in the error box of the gamma-ray burst of 25 April 1998 Observatorio Europeo Austral 1181 1998 Science & Technology – Other Topics WOS:000076472600043 J Inhibition of the platelet glycoprotein IIb/IIIa receptor with tirofiban in unstable angina and non-Q-wave myocardial infarction Pontificia Universidad Catolica de Chile 1143 1998 General & Internal Medicine WOS:000073699100002 J Cisplatin-based adjuvant chemotherapy in patients with completely resected non-small-cell lung cancer Instituto de Radiomedicina 1129 2004 General & Internal Medicine WOS:000188254800007 J Freshwater biodiversity: importance, threats, status and conservation challenges Universidad Austral de Chile 1095 2006 Life Sciences & Biomedicine – Other Topics WOS:000238057200001 J ISIS-4 – A RANDOMIZED FACTORIAL TRIAL ASSESSING EARLY ORAL CAPTOPRIL, ORAL MONONITRATE, AND INTRAVENOUS MAGNESIUM-SULFATE IN 58,050 PATIENTS WITH SUSPECTED ACUTE MYOCARDIAL-INFARCTION Clinica Las Condes 1084 1995 General & Internal Medicine WOS:A1995QM73200006 J The Sorcerer II Global Ocean Sampling expedition: Northwest Atlantic through Eastern Tropical Pacific Universidad de Concepcion 1006 2007 Biochemistry & Molecular Biology; Life Sciences & Biomedicine – Other Topics WOS:000245243500006 J New constraints on Omega(M), Omega(Lambda), and w from an independent set of 11 high-redshift supernovae observed with the Hubble Space Telescope Observatorio Europeo Austral 980 2003 Astronomy & Astrophysics WOS:000186688700009 J INFRARED STANDARD STARS Observatorio Interamericano Cerro Tololo 975 1982 Astronomy & Astrophysics WOS:A1982NY85200008 J Planck 2013 results. XXII. Constraints on inflation [Kneissl, R.], Atacama Large Millimeter Array; [Kneissl, R.], Observatorio Europeo Austral. 963 2014 Astronomy & Astrophysics WOS:000345282600105 J Global iron connections between desert dust, ocean biogeochemistry, and climate Universidad de Concepcion 958 2005 Science & Technology – Other Topics WOS:000228221500033 J The Sixth Data Release of the Sloan Digital Sky Survey [Schreiber, Matthias R.], Universidad de Valparaiso. 939 2008 Astronomy & Astrophysics WOS:000257759300001 J GEOMETRY OF THE 2+1 BLACK-HOLE Universidad de Chile 932 1993 Astronomy & Astrophysics; Physics WOS:A1993LT88000005 J A very energetic supernova associated with the gamma-ray burst of 29 March 2003 Observatorio Europeo Austral 899 2003 Science & Technology – Other Topics WOS:000183585300039 J Safety and efficacy of an attenuated vaccine against severe rotavirus gastroenteritis Universidad de Chile, Universidad de Concepcion. 895 2006 General & Internal Medicine WOS:000234358600004 J Pazopanib in Locally Advanced or Metastatic Renal Cell Carcinoma: Results of a Randomized Phase III Trial Fundacion Arturo Lopez Perez 883 2010 Oncology WOS:000274653200026 J Ecological effects of climate fluctuations Pontificia Universidad Catolica de Chile 875 2002 Science & Technology – Other Topics WOS:000177573900032 J ON THE NATURE AND IMPLICATIONS OF STARBURST-DRIVEN GALACTIC SUPERWINDS Observatorio Interamericano Cerro Tololo 867 1990 Astronomy & Astrophysics WOS:A1990EP03100002 J The High-Z Supernova Search: Measuring cosmic deceleration and global curvature of the universe using Type IA supernovae Observatorio Interamericano Cerro Tololo, Universidad de Chile. 857 1998 Astronomy & Astrophysics WOS:000077779400006 J Composite quasar spectra from the Sloan Digital Sky Survey Pontificia Universidad Catolica de Chile 845 2001 Astronomy & Astrophysics WOS:000170429300004 J Mesenchymal progenitor cells in human umbilical cord blood Universidad de Chile, Clinica Las Condes. 840 2000 Hematology WOS:000087554100029 J Spectroscopic discovery of the supernova 2003dh associated with GRB 030329 Observatorio Interamericano Cerro Tololo, Observatorio Las Campanas. 813 2003 Astronomy & Astrophysics WOS:000183618100005 J ORGANIC GEOCHEMICAL INDICATORS OF PALEO-ENVIRONMENTAL CONDITIONS OF SEDIMENTATION Empresa Nacional del Petroleo 811 1978 Science & Technology – Other Topics WOS:A1978EQ85600025 J IMPROVED COSMOLOGICAL CONSTRAINTS FROM NEW, OLD, AND COMBINED SUPERNOVA DATA SETS [Lidman, C.], Observatorio Europeo Austral; [Smith, R. C.], Observatorio Interamericano Cerro Tololo; [Phillips, M. M.], Observatorio Las Campanas. 791 2008 Astronomy & Astrophysics WOS:000260370500001 J How does foreign direct investment affect economic growth? Universidad de Chile 785 1998 Business & Economics WOS:000074767700006 J Phase III study of docetaxel and cisplatin plus fluorouracil compared with cisplatin and fluorouracil as first-line therapy for advanced gastric cancer: A report of the V325 study group Fundacion Arturo Lopez Perez, Universidad de Chile. 783 2006 Oncology WOS:000241825900009 J GATE: a simulation toolkit for PET and SPECT Universidad de Santiago de Chile 772 2004 Engineering; Radiology, Nuclear Medicine & Medical Imaging WOS:000224663300007 J NEAR-INFRARED PHOTOMETRY .2. INTRINSIC COLORS AND THE ABSOLUTE CALIBRATION FROM ONE TO 5 MICRON Observatorio Europeo Austral 769 1983 Astronomy & Astrophysics WOS:A1983RU56900010 J Apixaban in Patients with Atrial Fibrillation [Lanas-Zanetti, Fernando], Universidad de La Frontera 763 2011 General & Internal Medicine WOS:000287928400006 J Environment and development – Sustainability science Comision Economica para America Latina y el Caribe 755 2001 Science & Technology – Other Topics WOS:000168478300024 J Transient optical emission from the error box of the gamma-ray burst of 28 February 1997 Observatorio Europeo Austral 755 1997 Science & Technology – Other Topics WOS:A1997WU38700047 J Comparison of caspofungin and amphotericin B for invasive candidiasis. Clinica Santa Maria 753 2002 General & Internal Medicine WOS:000179874500005 J Challenges in the quest for keystones Pontificia Universidad Catolica de Chile 751 1996 Life Sciences & Biomedicine – Other Topics WOS:A1996VD35100012 J THE GALACTIC ABUNDANCE GRADIENT Observatorio Europeo Austral 715 1983 Astronomy & Astrophysics WOS:A1983QW76500006 J A COMPOSITE CO SURVEY OF THE ENTIRE MILKY-WAY Universidad de Chile, Observatorio Europeo Austral 713 1987 Astronomy & Astrophysics WOS:A1987K690100013 J Worldwide variations in the prevalence of asthma symptoms: the International Study of Asthma and Allergies in Childhood (ISAAC) Universidad de Santiago de Chile 701 1998 Respiratory System WOS:000075510900011 J ALPHA-TROPOMYOSIN AND CARDIAC TROPONIN-T MUTATIONS CAUSE FAMILIAL HYPERTROPHIC CARDIOMYOPATHY – A DISEASE OF THE SARCOMERE Hospital Militar de Santiago 695 1994 Biochemistry & Molecular Biology; Cell Biology WOS:A1994NQ12300010 J THE ABSOLUTE MAGNITUDES OF TYPE-IA SUPERNOVAE Observatorio Interamericano Cerro Tololo 693 1993 Astronomy & Astrophysics WOS:A1993LT20200013 J Ten years’ experience with alendronate for osteoporosis in postmenopausal women Pontificia Universidad Catolica de Chile 689 2004 General & Internal Medicine WOS:000220242400006 J Planck 2013 results. I. Overview of products and scientific results [Kneissl, R.], Atacama Large Millimeter Array; [Kneissl, R.], Observatorio Europeo Austral. 688 2014 Astronomy & Astrophysics WOS:000345282600007 J Financial intermediation and growth: Causality and causes Banco Central de Chile 687 2000 Business & Economics WOS:000088305200002 J A ROOM-TEMPERATURE MOLECULAR ORGANIC BASED MAGNET Universidad Tecnica Federico Santa Maria 684 1991 Science & Technology – Other Topics WOS:A1991FP86800030 J The first data release of the Sloan Digital Sky Survey Pontificia Universidad Catolica de Chile 679 2003 Astronomy & Astrophysics WOS:000185676200035 J Breast cancer and hormonal contraceptives: Collaborative reanalysis of individual data on 53297 women with breast cancer and 100239 women without breast cancer from 54 epidemiological studies Universidad de Chile 676 1996 General & Internal Medicine WOS:A1996UT39600008 J Spectroscopic target selection for the Sloan Digital Sky Survey: The luminous red galaxy sample Universidad de Chile 675 2001 Astronomy & Astrophysics WOS:000172086100009 J VARIETIES OF CALCIUM-ACTIVATED POTASSIUM CHANNELS Centro de Estudios Cientificos 671 1989 Physiology WOS:A1989T780300029 J Matrix converters: A technology review Universidad Tecnica Federico Santa Maria 656 2002 Automation & Control Systems; Engineering; Instruments & Instrumentation WOS:000174745600002 J Prophylactic cranial irradiation for patients with small-cell lung cancer in complete remission Instituto de Radiomedicina 655 1999 General & Internal Medicine WOS:000081962600003 J Case detection, diagnosis, and treatment of patients with primary aldosteronism: An endocrine society clinical practice guideline  [Fardella, Carlos], Pontificia Universidad Catolica de Chile 652 2008 Endocrinology & Metabolism WOS:000258951100002 J Detection of B-Mode Polarization at Degree Angular Scales by BICEP2 [Barkats, D.] Atacama Large Millimeter Array. 649 2014 Physics WOS:000341003800002 J Spectroscopic target selection in the Sloan Digital Sky Survey: The quasar sample Pontificia Universidad Catolica de Chile 636 2002 Astronomy & Astrophysics WOS:000175830300005 J Selective imprinting of gut-homing T cells by Peyer’s patch dendritic cells Universidad de Chile, Instituto Milenio de Biología Fundamental y Aplicada. 634 2003 Science & Technology – Other Topics WOS:000183912800046 J Plasma membrane channels formed by connexins: Their regulation and functions Pontificia Universidad Catolica de Chile 633 2003 Physiology WOS:000185500200008 J Mechanics of the mammalian cochlea Universidad de Chile 633 2001 Physiology WOS:000169570800009 J Recent Advances and Industrial Applications of Multilevel Converters [Rodriguez, Jose; Perez, Marcelo A.] Universidad Tecnica Federico Santa Maria. 620 2010 Automation & Control Systems; Engineering; Instruments & Instrumentation WOS:000282030800001 J UBVRI STANDARD STARS IN THE E-REGIONS Observatorio Interamericano Cerro Tololo 600 1982 Astronomy & Astrophysics WOS:A1982NS15200008 J FIBER COMPOSITION OF THE HUMAN CORPUS-CALLOSUM Universidad de Chile 591 1992 Neurosciences & Neurology WOS:A1992KE92400019 J The rest-frame optical spectra of Lyman break galaxies: Star formation, extinction, abundances, and kinematics Observatorio Europeo Austral 588 2001 Astronomy & Astrophysics WOS:000169943400024 J Facilitation in plant communities: the past, the present, and the future [Cavieres, Lohengrin A.; Quiroz, Constanza L.] Universidad de Concepcion. 583 2008 Plant Sciences; Environmental Sciences & Ecology WOS:000252846500004 J Acetylcholinesterase accelerates assembly of amyloid-beta-peptides into Alzheimer’s fibrils: Possible role of the peripheral site of the enzyme Pontificia Universidad Catolica de Chile 577 1996 Neurosciences & Neurology WOS:A1996UG61100021 J PRESERVATION OF HAMSTER OOCYTES TO ASSAY THE FERTILIZING-CAPACITY OF HUMAN-SPERMATOZOA Pontificia Universidad Catolica de Chile 571 1982 Reproductive Biology WOS:A1982PG63500026 J Observational constraints on the nature of dark energy: First cosmological results from the ESSENCE supernova survey Observatorio Interamericano Cerro Tololo, Pontificia Universidad Catolica de Chile 564 2007 Astronomy & Astrophysics WOS:000249305700007 J Fully coupled “online” chemistry within the WRF model Universidad de Chile 563 2005 Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences WOS:000233473900002 J Supernova limits on the cosmic equation of state Observatorio Interamericano Cerro Tololo, Pontificia Universidad Catolica de Chile 558 1998 Astronomy & Astrophysics WOS:000079250400008 J Childhood functional gastrointestinal disorders: Child/adolescent Pontificia Universidad Catolica de Chile 555 2006 Gastroenterology & Hepatology WOS:000237520400014 J Genetic variants in novel pathways influence blood pressure and cardiovascular disease risk  [Eyheramendy, Susana] Pontificia Universidad Catolica de Chile. 554 2011 Science & Technology – Other Topics WOS:000295575400043 J The management of fisheries and marine ecosystems Pontificia Universidad Catolica de Chile 553 1997 Science & Technology – Other Topics WOS:A1997XM86700033 J The fetal inflammatory response syndrome Hospital Dr Sotero del Rio 552 1998 Obstetrics & Gynecology WOS:000075199300031 J Multilevel voltage-source-converter topologies for industrial medium-voltage drives Universidad Tecnica Federico Santa Maria 551 2007 Automation & Control Systems; Engineering; Instruments & Instrumentation WOS:000251457600002 J An international study of the relation between somatic symptoms and depression Universidad de Chile 545 1999 General & Internal Medicine WOS:000083357800001 J Proposed international clinical diabetic retinopathy and diabetic macular edema disease severity scales Universidad de Chile 538 2003 Ophthalmology WOS:000184950200002 J A guided tour to approximate string matching Universidad de Chile 536 2001 Computer Science WOS:000168987700002 J Diagnostic accuracy of mammography, clinical examination, US, and MR imaging in preoperative assessment of breast cancer Corporacion Nacional del Cancer 535 2004 Radiology, Nuclear Medicine & Medical Imaging WOS:000225342400029 J The unfolded protein response: controlling cell fate decisions under ER stress and beyond [Hetz, Claudio] Universidad de Chile. 534 2012 Cell Biology WOS:000299999500011 J Localized excitations in a vertically vibrated granular layer Universidad de Santiago de Chile 534 1996 Science & Technology – Other Topics WOS:A1996VE34700041 J The ATLAS Experiment at the CERN Large Hadron Collider Pontificia Universidad Catolica de Chile, Universidad Tecnica Federico Santa Maria 532 2008 Instruments & Instrumentation WOS:000258875900010

  Fuente consultada: http://apps.webofknowledge.com/summary.do?

Fecha consulta: 19 enero 2016

Se consideran todo tipo de documentos y el periodo de tiempo completo que la plataforma WOS permite, para el conteo de todas aquellas publicaciones con afiliación a alguna universidad o centro de investigación chileno.

[zackhuntsdwarfs-blog]

The histogram in my last post was deeply flawed. Shown above is a better-labeled version (through the matching algorithm in AstroML) with arcseconds as the X-axis. Why is everything moving almost an arcsecond?

The answer is in the image above. The color scale of this image has been adjusted, so that we can see how bright various source are. Look at all of those extremely faint sources! Matt has explained to me that due to the pixel size differences between IRAC and the processed images, SExtractor underestimates the noise level. I've since increased SExtractor's standards for detection to 5 pixels at 2 sigma, from 4 at 0.5. That ought to clean up these source images.