B3 1659+399 multiwavelength SED

Also known as 1FLAT J170124.6+395437, B31759+399, BZB J1701+3954, CRATES J170123+395432, FBQS J170124.6+395437, SDSS J170124.63+395437.1.

• Class: BL Lac
• Redshift: z = 0.507
• Position (ICRS): RA 255.35265°, Dec 39.91030°
• Data: 6,226 points (6 upper limits) from 29 catalogues
• Dated data: 2010–2024 (MJD 55250–60609)
• Undated catalogue values: 69
• Frequency range of detections: log ν = 8.2–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 52 UVOT
• Largest catalogues (points): ZTF (3,767), NEOWISE (1,093), ASAS-SN (1,012), PanSTARRS-LC (159), WISEME (126)

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=255.35265, dec=39.9103, name="B3 1659+399")

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

Other BL Lac objects

• Mrk 501
• B3 1615+412
• I Zw 187
• B2 1811+31
• RBS 1555
• 1ES 1533+535

How to cite

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