PG 1437+398 multiwavelength SED

Also known as 1FGL J1439.2+3930, 1FLAT J143917.5+393242, 2FGL J1439.2+3932, 2WHSP J143917.3+393242, 3FGL J1439.2+3931, 3HSP J143917.5+393243, 5BZB J1439+3932, BZB J1439+3932, ROXA J143917.3+393242.7, SDSS J143917.47+393242.8, SHBL J143917.4+393243.

• Class: BL Lac
• Redshift: z = 0.344
• Position (ICRS): RA 219.82283°, Dec 39.54522°
• Data: 4,494 points (15 upper limits) from 31 catalogues
• Dated data: 2008–2024 (MJD 54624–60568)
• Undated catalogue values: 70
• Frequency range of detections: log ν = 8.2–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 126 UVOT and 110 XRT
• Largest catalogues (points): ZTF (2,384), NEOWISE (855), ASAS-SN (774), WISEME (136), MMDCXRT (104)

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=219.82283, dec=39.54522, name="PG 1437+398")

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

Other BL Lac objects

• H 1426+428
• TXS 1422+373
• 87GB 141615.9+355650
• RBS 1467
• B3 1323+415
• 1E 1415.6+2557

How to cite

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