PKS 2131-021 multiwavelength SED

Also known as 1FGL J2134.0-0203, 1FLAT J213410.3-015317, 1Jy 2131-021, 1OUNYU J213410-0153.2, 2FGL J2133.8-0154, 3FGL J2134.1-0152, 4C-02.81, 5BZB J2134-0153, BZB J2134-0153, CRATES J213410-015325, PKS B2131-021, TXS 2131-021, WMAP20, WMAP5 J0501-0159.

• Class: BL Lac
• Redshift: z = 1.283
• Position (ICRS): RA 323.54296°, Dec −1.88812°
• Data: 2,686 points (5 upper limits) from 47 catalogues
• Dated data: 2007–2025 (MJD 54205–60969)
• Undated catalogue values: 211
• Frequency range of detections: log ν = 7.9–25.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 32 UVOT and 26 XRT
• Largest catalogues (points): ZTF (1,303), ASAS-SN (761), ALMA (146), PanSTARRS-LC (65), WISEME (58)

Get the data

• The SED as CSV from the MMDC SED API (docs.mmdc.am).
• In Python, with astro-mmdc:

  from astro_mmdc import MMDC
  sed = MMDC().sed.get(ra=323.54296, dec=-1.88812, name="PKS 2131-021")

• The interactive SED plot, with time filtering and modeling (needs JavaScript).

Other BL Lac objects

• MS 2143.4+0704
• 87GB 214302.1+095227
• TXS 2147-144
• TXS 2056-149
• 4C +16.67
• PKS 2155-304

How to cite

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