B2 1520+31 multiwavelength SED

Also known as 1FGL J1522.1+3143, 1FLAT J152210.0+314414, 1OUNYU J152210+3144.2, 2FGL J1522.1+3144, 3FGL J1522.1+3144, 5BZQ J1522+3144, BZQ J1522+3144, CRATES J152209+314418, TEX 1520+319, TXS 1520+319.

• Class: FSRQ
• Redshift: z = 1.489
• Position (ICRS): RA 230.54163°, Dec 31.73733°
• Data: 3,728 points (138 upper limits) from 33 catalogues
• Dated data: 2008–2024 (MJD 54686–60363)
• Undated catalogue values: 79
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, X-ray, γ-ray)
• Largest catalogues (points): ZTF (2,024), NEOWISE (747), MMDCGR (568), WISEME (186), PanSTARRS-LC (69)

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=230.54163, dec=31.73733, name="B2 1520+31")

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

Other FSRQs

• B2 1436+37B
• B2 1604+27
• PKS 1441+25
• OS 319
• B2 1606+40
• OQ 334

How to cite

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