1E 1207.9+3945 multiwavelength SED

Also known as 1207+39W4, 1FLAT J121026.6+392908, 3HSP J121026.6+392908, 5BZB J1210+3929, BZB J1210+3929, SDSS J121026.58+392908.6.

• Class: BL Lac
• Redshift: z = 0.617
• Position (ICRS): RA 182.61113°, Dec 39.48583°
• Data: 9,545 points (101 upper limits) from 32 catalogues
• Dated data: 2005–2025 (MJD 53730–60786)
• Undated catalogue values: 141
• Frequency range of detections: log ν = 8.2–26.2 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 2,498 UVOT and 2,628 XRT
• Largest catalogues (points): XRTSPEC (2,325), MMDCXRT (2,098), OULC (1,785), ZTF (1,505), MMDCOUV (668)

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=182.61113, dec=39.48583, name="1E 1207.9+3945")

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

Other BL Lac objects

• RBS 1040
• B3 1159+450
• Ton 116
• B2 1215+30
• PG 1218+304
• RBS 0970

How to cite

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