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Title | Astro Data |
Description | Finding and tracing "gaps" with differential Astro Data Group Astro Data Group Home About © 2021 astrodatagroup CC-BY Finding and tracing "gaps" with differential topology May 21, 2021 by Gabriella C |
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WebSite | astrodata.nyc |
Host IP | 185.199.109.153 |
Location | - |
Site | Rank |
US$362,542
Last updated: 2023-05-17 16:29:44
astrodata.nyc has Semrush global rank of 29,194,764. astrodata.nyc has an estimated worth of US$ 362,542, based on its estimated Ads revenue. astrodata.nyc receives approximately 41,832 unique visitors each day. Its web server is located in -, with IP address 185.199.109.153. According to SiteAdvisor, astrodata.nyc is safe to visit. |
Purchase/Sale Value | US$362,542 |
Daily Ads Revenue | US$335 |
Monthly Ads Revenue | US$10,040 |
Yearly Ads Revenue | US$120,476 |
Daily Unique Visitors | 2,789 |
Note: All traffic and earnings values are estimates. |
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Astro Data Group Astro Data Group Home About © 2021 astrodatagroup CC-BY Finding and tracing "gaps" with differential topology May 21, 2021 by Gabriella Contardo 2 min read We’ve been working with David W. Hogg on “How to find gaps” (or under-densities) in a data-set. Our current method relies on having a twice-differentiable density estimator (see the previous post), namely a KDE using a quartic kernel, and some KDTree tricks for rapidity (it works! So fast!). We can find the “critical points” (minima, maxima, saddle points) using the Hessian (second derivative) of the estimated densities (i.e. on a grid). And from each of these critical points, we can also trace the “paths” going down the density gradient. Now, we need to figure out what metric(s) will best characterize the “gappiness” of a point(critical or on a path) for selection. The above plot shows the galactocentric radial vs azimuthal velocities for ~90,000 nearby stars from Gaia data, courtesy of Jason Hunt (thanks!). The |
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Domain Name: astrodata.nyc Registry Domain ID: D7ED7F0556B8540B49AE0C897DE7FB568-NSR Registrar WHOIS Server: whois.namecheap.com Registrar URL: http://www.namecheap.com Updated Date: 2021-06-11T05:47:18Z Creation Date: 2019-07-06T12:34:45Z Registry Expiry Date: 2023-07-06T12:34:45Z Registrar: NameCheap, Inc. Registrar IANA ID: 1068 Registrar Abuse Contact Email: abuse@namecheap.com Registrar Abuse Contact Phone: +1.6613102107 Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Domain Status: renewPeriod https://icann.org/epp#renewPeriod Registrant State/Province: NY Registrant Country: US Name Server: dns1.registrar-servers.com Name Server: dns2.registrar-servers.com DNSSEC: unsigned nyc ID: C06B049C8863647AA993DB6BB3C0EB2F1-NSR nyc Nexus Category: INDIV >>> Last update of WHOIS database: 2022-06-09T08:37:15Z <<< |