B2 0201+24 multiwavelength SED

Also known as 1FLAT J020421.5+241749, 1OUNYU J020422+2417.8, 3FGL J0204.2+2420, 3HSP J020421.5+241751, CRATES J020421+241749, TXS 0201+240.

• Class: BL Lac
• Redshift: z = 0.180
• Position (ICRS): RA 31.08977°, Dec 24.29742°
• Data: 3,009 points (36 upper limits) from 30 catalogues
• Dated data: 2010–2024 (MJD 55217–60523)
• Undated catalogue values: 94
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Largest catalogues (points): ASAS-SN (1,917), NEOWISE (550), ZTF (244), WISEME (87), PanSTARRS-LC (64)

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=31.08977, dec=24.29742, name="B2 0201+24")

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

Other BL Lac objects

• 1ES 0229+200
• PKS 0235+164
• MS 0205.7+3509
• S2 0109+22
• 1ES 0120+340
• TXS 0159+085

How to cite

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