TXS 0506+056 multiwavelength SED

Names and position

Also known as 1FGL J0509.3+0540, 1FLAT J050926.0+054135, 1OUNYU J050926+0541.6, 2FGL J0509.4+0542, 2FHL J0509.5+0541, 3FGL J0509.4+0541, 4FGL J0509.4+0542, 5BZB J0509+0541, BZB J0509+0541, CGRaBS J0509+0541, CRATES J050926+054143, IC170922A, IceCube 170922A, MG0509+0541, MGJ0509+0541, PMN J0509+0541.

• Class: BL Lac
• Fermi-LAT (4FGL): 4FGL J0509.4+0542
• Position (ICRS): RA 77.35819°, Dec 5.69315°
• Galactic: l 195.405°, b −19.636°

Other names and measurements: NED and SIMBAD within 5″ of this position.

The SED

• Data: 6,745 points (50 upper limits) from 41 catalogues
• Dated data: 2008–2025 (MJD 54693–60968)
• Undated catalogue values: 131
• 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: 930 UVOT and 454 XRT
• Largest catalogues (points): MMDCNuX (1,389), ASAS-SN (1,358), ZTF (983), NEOWISE (577), SUFST (487)

Data by band

All 7 bands have data. The X-ray band has the most points, 2,795 of 6,745; its largest catalogue is MMDCNuX with 1,389.

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=77.35819, dec=5.69315, name="TXS 0506+056")

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

See an AstroGenesis answer about TXS 0506+056

Nearby sources

• PKS 0502+049, 1.2° away
• 4C +06.21, 3.2° away
• OG 050, 6.1° away
• S3 0458-02, 7.9° away

Other BL Lac objects

• 1H 0506-039
• 1ES 0414+009
• RBS 0589
• 1H 0323+022
• 1ES 0347-121
• 1E 0317.0+1835

How to cite

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