S4 1842+68 multiwavelength SED

Also known as 1OUNYU J184234+6809.4, 3FGL J1842.8+6810, 5BZQ J1842+6809, BZQ J1842+6809, CRATES J184232+680929, PLCKERC030G098.51+25.79, S41842+681, WMAP5 J1842+6808, WMAP66.

• Class: FSRQ
• Redshift: z = 0.472
• Position (ICRS): RA 280.64017°, Dec 68.15701°
• Data: 3,348 points (27 upper limits) from 32 catalogues
• Dated data: 2010–2024 (MJD 55204–60610)
• Undated catalogue values: 81
• 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: 40 UVOT and 7 XRT
• Largest catalogues (points): ZTF (2,685), WISEME (446), PanSTARRS-LC (83), MMDCOUV (20), OUSXB (20)

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=280.64017, dec=68.15701, name="S4 1842+68")

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

Other FSRQs

• S4 1849+67
• TXS 1933+655
• S4 1716+68
• 87GB 200541.3+641601
• TXS 1700+685
• TXS 1645+635

How to cite

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