Long-Period Radio Transient Catalog

LPT-Cat

About LPT-Cat

LPT-Cat is a curated catalog of long-period radio transients (LPTs), a mysterious population of radio sources characterized by minute- to hour-long periodicities. This catalog compiles published LPTs from the literature, including their positions, periods, spin-down constraints, dispersion measures (DM), rotation measures (RM), and key observational notes.

You can download the catalog in CSV version.

If you find any errors or missing information, please let me know via email (zhao27[AT]tsinghua.edu.cn). If you use LPT information from this catalog in your research, please cite the relevant discovery papers listed in the References column. Acknowledging the use of this website in your research paper would be appreciated. Thanks!

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Sky distribution of known long-period transients (LPTs). Squares show LPTs that are (likely) white dwarf (WD)–M dwarf binary systems, while dots represent LPTs with unknown nature. The distribution is shown in Galactic (ℓ, b) and Equatorial (RA, Dec). Hover over a source marker to see the corresponding LPT name, and zoom in to inspect crowded regions.
Uncertainties and upper limits are quoted at the 1σ level when available.
P-Pdot diagram including LPTs
P–Ṗ diagram including available LPTs. Black dots show radio pulsars from the ATNF pulsar catalog, with anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) highlighted. The shaded region (adapted from hrm+25) represents the "death valley", below which coherent radio emission is not expected. CHIME/ILT J1634+44 is not shown in this diagram due to its negative period derivative.

Updates

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