J/AZh/74/42 J/AZh/74/42 RATAN-600 radio sources spectra N N Bursov Astron. Zh. 74 42 1997 1997AZh....74...42B VIII/33 : Spectral characteristics of RATAN (RC) Catalog (Bursov+ 1989) J/A+AS/87/1 : RATAN-600 7.6 cm radio sources catalog (Parijskij+ 1991) J/other/BSAO/40.128 : RATAN-600 radio sources spectra (Bursov 1996) J/other/BSAO/40.5 : RATAN-600 RC radio sources (Parijskij+ 1996) Radio sources Spectroscopy A multifrequency deep survey of a band of sky with the declination of the source SS 433 ({delta}~5{deg}+/-20') was performed as part of the "Kholod" program on the RATAN-600 in 1987-1988. The right ascension intervals covered by the survey are 0h<{alpha}<14h and 18h<{alpha}<24h. The spectral properties of 400 sources from the RC catalog were determined for the first time by using only RATAN-600 data. The maximum in the flux density distribution for these sources at the central wavelength, {lambda}7.6cm, occurs at ~30mJy. The lower flux limits for the sample at wavelengths of 3.9, 7.6, 13.0, and 31.0cm are 16, 9, 37, and 61mJy, respectively. These observations provide the first flux estimates at 13.0 and 31.0cm for 90% of the sources. Spectra were measured for the first time for 112 sources (28%) and were revised for 90 sources (23%). The maximum in the spectral index distribution for the entire sample in the interval from {lambda}{lambda}7.6-31.0cm occurs at {alpha}=-0.86+/-0.04 (S_v_~{nu}^{alpha}^). The spectra of some 20 of the sample sources (5%) are peaked at roughly 1GHz, and about 40 spectra (10%) have low-frequency breaks. Roughly 70 sources (19%) have flat spectra ({alpha}>-0.5), and 64 (18%) have very steep spectra ({alpha}<-1.1).

Seq Sequential number --- RC Name of the source in the RC catalogue derived from the coordinates for the epoch J2000 --- n_RC Corrected or new spectrum number=1 n: sources with the spectra obtained for the first time c: sources with revised or corrected spectra For the rest of the sources, spectra was added --- RAh Right ascension (1950) h RAm Right ascension (1950) min RAs Right ascension (1950) s DE- Declination sign --- DEd Declination (1950) deg DEm Declination (1950) arcmin DEs Declination (1950) arcsec Shift Shift in height {DELTA}h from the centre of the antenna beam arcmin l_S3.9cm Limit flag on S3.9cm --- S3.9cm Flux density at {lambda}3.9cm (7GHz) mJy n_S3.9cm n: Flux values is lacking --- e_S3.9cm rms uncertainty on S3.9cm mJy l_S7.6cm Limit flag on S7.6cm (3.9GHz) --- S7.6cm Flux density at {lambda}7.6cm mJy n_S7.6cm n: Flux values is lacking --- e_S7.6cm rms uncertainty on S7.6cm mJy l_S13.0cm Limit flag on S13.0cm --- S13.0cm Flux density at {lambda}13.0cm (2.3GHz) mJy n_S13.0cm n: Flux values is lacking --- e_S13.0cm rms uncertainty on S13.0cm mJy l_S31.0cm Limit flag on S31.0cm --- S31.0cm Flux density at {lambda}31.0cm (0.96GHz) mJy n_S31.0cm n: Flux values is lacking --- e_S31.0cm rms uncertainty on S31.0cm mJy SI Calculated spectral index from {lambda}{lambda}7.6-31.0cm --- Spectrum Type of the source spectrum number=2 Types from the classification of Kellerman (1974, in, Galactic and Extragalactic Radio Astronomy, ed: G.L. Verschuur and K.I. Kellerman, Springer-Verlag, berlin, Heildelberg, New-York, 320.). S: linear power-law spectra associated with extended optically thin radio sources. C-: The spectrum has a negative second derivative of the dependence logS-log{nu} and is more steep at the short wavelengths. Such spectra are also assigned to extended radio sources Cmax: The power spectrum (class S) or dual power spectrum (class C-) at short waves, but there is a sharp cut off at the long wavelengths. Such spectra are produced by compact optically thick sources. C+: The spectrum has positive curvature with a rise at the long or the short wavelengths. CPX: Complex spectra with one or more minima. The spectra are generally believed to be composed of two or more spectra of class Cmax plus, in some case, of class S. The spectra of this class are also assigned to compact optically thick objects. F: Flat spectra --- James Marcout, Patricia Bauer CDS 1998Nov16 UNKNOWN UNKNOWN Prepared via OCR at CDS. J_AZh_74_42.xml