3C 454.3 multiwavelength SED

Names and position

Also known as 1FGL J2253.9+1608, 1FLAT J225357.7+160853, 1Jy 2251+158, 2FGL J2253.9+1609, 2FHL J2254.0+1613, 3FGL J2254.0+1608, 5BZQ J2253+1608, BZQ J2253+1608, CRATES J225358+160853, PKS 2251+158, PKS B2251+158, TXS 2251+158, WMAP55, WMAP5 J2254+1608, [HB89] 2251+158.

• Class: FSRQ
• Redshift: z = 0.859
• Position (ICRS): RA 343.49062°, Dec 16.14821°
• Galactic: l 86.111°, b −38.184°

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

The SED

• Data: 38,220 points (469 upper limits) from 55 catalogues
• Dated data: 2000–2025 (MJD 51700–60951)
• Undated catalogue values: 1,176
• Frequency range of detections: log ν = 7.2–25.4 [Hz] (radio, microwave, infrared, optical, ultraviolet, X-ray, γ-ray)
• Swift measurements analysed by MMDC: 4,640 UVOT and 6,907 XRT
• Largest catalogues (points): MMDCXRT_ORBIT (9,863), ASAS-SN (8,734), MMDCXRT (6,438), SMARTS (3,448), MMDCGR (2,591)

Data by band

All 7 bands have data. The X-ray band has the most points, 17,735 of 38,220; its largest catalogue is MMDCXRT_ORBIT with 9,863.

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=343.49062, dec=16.14821, name="3C 454.3")

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

Nearby sources

• PKS 2246+208, 5.1° away
• CTA 102, 6.8° away
• PKS 2223+21, 8.5° away
• 4C +10.73, 10.3° away

Other FSRQs

• PKS 2325+093
• PKS 2201+171
• B2 2234+28A
• TXS 2331+073
• 4C +27.50
• PKS B2224+006

How to cite

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