4C +39.23 multiwavelength SED

Also known as 1FLAT J082455.5+391641, 1OUNYU J082456+3916.7, 2FGL J0824.7+3914, 3FGL J0824.9+3916, 5BZQ J0824+3916, B20821+39, BZQ J0824+3916, CRATES J082456+391645, ROXA J082455.3+391641.9, S40821+394, WMAP5 J0824+3914.

• Class: FSRQ
• Redshift: z = 1.216
• Position (ICRS): RA 126.23118°, Dec 39.27831°
• Data: 2,497 points (5 upper limits) from 37 catalogues
• Dated data: 2010–2024 (MJD 55298–60610)
• Undated catalogue values: 82
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 38 UVOT and 4 XRT
• Largest catalogues (points): ZTF (2,041), ASAS-SN (175), WISEME (78), PanSTARRS-LC (77), MMDCOUV (17)

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=126.23118, dec=39.27831, name="4C +39.23")

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

Other FSRQs

• S4 0805+41
• OJ 451
• B3 0803+452
• OI 380
• 4C +38.28
• OJ 508

How to cite

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