1H 1241+626 multiwavelength SED

Also known as 1FLAT J123739.1+625842, 1H1241+626.A, 1RXS J123739.2+625843, 2WHSP J123738.9+625841, 3HSP J123739.1+625843, 5BZB J1237+6258, BZB J1237+6258, H B891235+632, MS 1235.4+6315, MS 12354+6315, ROXA J123738.9+625842.8, SDSS J123739.08+625842.8, SHBL J123739.0+625842.

• Class: BL Lac
• Redshift: z = 0.297
• Position (ICRS): RA 189.41283°, Dec 62.97858°
• Data: 2,425 points (43 upper limits) from 29 catalogues
• Dated data: 2004–2024 (MJD 53353–60432)
• Undated catalogue values: 67
• Frequency range of detections: log ν = 9.2–25.4 [Hz] (radio, microwave, infrared, optical, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 12 UVOT and 151 XRT
• Largest catalogues (points): NEOWISE (956), ZTF (476), MMDCXRT (439), ASAS-SN (174), OUSXB (127)

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=189.41283, dec=62.97858, name="1H 1241+626")

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

Other BL Lac objects

• MS 1229.2+6430
• SBS 1200+608
• TXS 1148+592
• Mrk 180
• SBS 1339+554
• MS 1407.9+5954

How to cite

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