S4 1749+70 multiwavelength SED

Also known as 1FGL J1748.5+7004, 1FLAT J174832.8+700550, 1Jy 1749+701, 1RXS J174832.9+700551, 2FGL J1748.8+7006, 2FHL J1748.7+7004, 3FGL J1748.6+7005, 4FGL J1748.6+7005, 5BZB J1748+7005, BZB J1748+7005, CRATES J174832+700550, S41749+701, S51749+701, TXS 1749+701, WMAP5 J1748+7006, WMAP68.

• Class: BL Lac
• Redshift: z = 0.770
• Position (ICRS): RA 267.13683°, Dec 70.09744°
• Data: 7,146 points (6 upper limits) from 39 catalogues
• Dated data: 2007–2025 (MJD 54147–60969)
• Undated catalogue values: 603
• Frequency range of detections: log ν = 7.9–26.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 212 UVOT and 216 XRT
• Largest catalogues (points): ZTF (3,275), ASAS-SN (1,929), WISEME (460), SUFST (444), MMDCGR (222)

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=267.13683, dec=70.09744, name="S4 1749+70")

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

Other BL Lac objects

• 3C 371
• S5 1803+784
• S5 2007+77
• 1ES 1959+650
• 4C +56.27
• 1H 1515+660

How to cite

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