Blazar SEDs, light curves and modeling

The Markarian Multiwavelength Data Center (MMDC) is a free web platform by ICRANet Armenia for building and analyzing the multiwavelength spectral energy distributions (SEDs) of blazars, active galactic nuclei whose relativistic jets point almost exactly at Earth.

Features

• Search a source by name or sky position and build its time-resolved SED and light curves, from radio to gamma-rays, with interactive plots, time filtering and CSV download.
• Archival data from over 80 catalogs and databases (through the VOU-Blazars tool), optical data from ASAS-SN, ZTF and Pan-STARRS, infrared data from WISE/NEOWISE, and newly analyzed Swift UVOT, Swift XRT, NuSTAR and Fermi-LAT data.
• On-demand Swift UVOT and XRT analysis of any sky position, through the API and the Python SDK.
• Blazar broadband emission modeling with machine-learning (CNN) leptonic (SSC, EIC) and lepto-hadronic models, including fits to your own data.
• Search of the related astrophysics literature.
• A Python SDK, astro-mmdc.
• User guides for the website and the SDK at docs.mmdc.am.

Tools

• SED builder: search a source and plot its SED and light curves.
• Blazar SED modeling: SSC, EIC and lepto-hadronic models, and fits to your data.
• Source pages: every source with a precomputed SED, by class.

Popular sources

• Mrk 421
• Mrk 501
• 3C 279
• 3C 273
• 3C 454.3
• PKS 2155-304
• TXS 0506+056
• BL Lac
• OJ 287
• M 87

Browse by class

• FSRQs
• BL Lac objects
• Other sources
• All source pages

How to cite

Sahakyan, N., Vardanyan, V., Giommi, P., et al. 2024, AJ, 168, 289, doi:10.3847/1538-3881/ad8231 (arXiv:2410.01207).