TXS 1645+635 multiwavelength SED

Also known as 1FLAT J164558.6+633010, 3FGL J1645.9+6336, 5BZQ J1645+6330, 7C1645+6335, BZQ J1645+6330, CRATES J164557+633014.

• Class: FSRQ
• Redshift: z = 2.379
• Position (ICRS): RA 251.49397°, Dec 63.50303°
• Data: 5,194 points (78 upper limits) from 32 catalogues
• Dated data: 2010–2024 (MJD 55203–60489)
• Undated catalogue values: 74
• Frequency range of detections: log ν = 7.9–25.4 [Hz] (radio, microwave, infrared, optical, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 16 UVOT and 2 XRT
• Largest catalogues (points): ZTF (2,877), NEOWISE (1,657), WISEME (242), ASAS-SN (241), PanSTARRS-LC (88)

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=251.49397, dec=63.50303, name="TXS 1645+635")

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

Other FSRQs

• TXS 1700+685
• S4 1716+68
• OS 562
• TXS 1623+578
• S4 1842+68
• S4 1849+67

How to cite

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