TXS 2056-149 multiwavelength SED

Also known as 2WHSP J205846.6-144304, 3HSP J205846.7-144305, CRATES J205845-144255, PGC920875.

• Class: BL Lac
• Redshift: z = 0.0777
• Position (ICRS): RA 314.69478°, Dec −14.71805°
• Data: 3,714 points (21 upper limits) from 33 catalogues
• Dated data: 2009–2024 (MJD 54988–60610)
• Undated catalogue values: 85
• 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: 4 UVOT and 9 XRT
• Largest catalogues (points): ASAS-SN (2,041), ZTF (868), NEOWISE (530), PanSTARRS-LC (97), WISEME (64)

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=314.69478, dec=-14.71805, name="TXS 2056-149")

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

Other BL Lac objects

• TXS 2147-144
• PKS 2131-021
• PKS 2155-304
• 1H 1914-194
• MS 2143.4+0704
• PKS 2240-260

How to cite

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