4C +04.42 multiwavelength SED

Also known as 1FGL J1222.5+0415, 1FLAT J122222.6+041315, 1OUNYU J122223+0413.2, 2FGL J1222.4+0413, 3FGL J1222.4+0414, 4C04.42, 5BZQ J1222+0413, BZQ J1222+0413, CRATES J122221+041316, PKS 1219+04, TXS 1219+044.

• Class: FSRQ
• Redshift: z = 0.966
• Position (ICRS): RA 185.59396°, Dec 4.22105°
• Data: 2,235 points (20 upper limits) from 52 catalogues
• Dated data: 2007–2024 (MJD 54317–60610)
• Undated catalogue values: 143
• 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: 48 UVOT and 47 XRT
• Largest catalogues (points): ZTF (1,178), NEOWISE (499), MMDCXRT (99), PanSTARRS-LC (80), MMDCGR (66)

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=185.59396, dec=4.22105, name="4C +04.42")

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

Other FSRQs

• 4C +03.23
• 3C 273
• 4C +13.46
• PKS 1200-051
• TXS 1212+171
• 3C 279

How to cite

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