Description of the website

This regularly updated website was created in an attempt to give an overall list of RR Lyraes which exhibit (or are suspected to exhibit) the Blazhko effect. This list is named BlaSGalF, which is an abbreviation of Blazhko Stars of the Galactic Field. The tables contain only bright Galactic Blazhko stars. Stars located in the galactic bulge, LMC, SMC, in globular clusters, or observed by the OGLE, LINEAR, and Catalina surveys are not included. Values given in tables come from available literature. Updating of the contents and values is based on regular checking of new publications. For each star the name, coordinates, type, magnitude range, pulsation period, Blazhko period and references are given.

Blazhko stars are divided into three groups according to the type of modulation. Just below the title you can find three links - stars with one Blazhko period (sorted by RA and sorted by constellation, this table contains the majority of modulated RR Lyraes), Stars with changing Blazhko period (modulation period is not a constant) and Stars with multiple Blazhko period (table with stars with more than one modulation period).

Link References to all resources takes you to the list with publications from which the values were taken. Under Last modification you can find a description of the latest changes to tables and the website.

Description of the tables

Column 1 If possible, the GCVS name of the star is given. If the star has no GCVS name, another available designation is mentioned (ASAS, GSC, KIC etc.)
Column 2 - RA Right ascension (epoch J2000.0) in the form of hours, minutes and seconds divided by spaces.
Column 3 - RA Declination (epoch J2000.0) in the form of degrees, minutes and arcseconds divided by spaces.
Column 4 - Type Type of RR Lyr - either RRab or RRc.
Column 5 - mag Magnitude range in V. If noted, c means 'clear', R means Johnsons R filter, k kepler system, p photographic
Column 6 - Ppuls Basic pulsation period in days.
Column 7 - Pbl Blazhko period in days.
Column 8 - Ref. Reference for Blazhko period.

The same column description applies to the values in the tables with changing Blazhko period and with multiple Blazhko period.

Acknowledgements: We made use of NASA's Astrophysics Data System and the International Variable Star Index (VSX) database, operated at AAVSO, Cambridge, Massachusetts, USA. Work on the list has been supported by GACR project GD205/08/H005, MU MUNI/A/0968/2009, MUNI/A/0735/2012.
Contact: This database is managed by Marek Skarka. If you have more recent values or if you have any suggestions, please let me know: