HIGH FREQUENCY PEAKERS  - HFPs
====>     research based on NRAO VLA multifrequency observations   <====
    !!!!!!!!!========Still under construction======== !!!!!!  (Last modified  on 30-Jan-04)


 


Daniele Dallacasa   Dipartimento di Astronomia, University of  Bologna
Sara Tinti                 Scuola Internazionale Studi Superiori Avanzati, Trieste
Carlo Stanghellini    Istituto Nazionale di AstroFisica - IRA , Noto

      Summary
Multifrequency observations have been carried out at L, C, X, U and K bands, typically with a single snapshot with duration around 1 minute. The observations carried out on 020703 had about 10 minutes on source at L band in order to search for extended emission in the bright sample. Detections are reported (jpeg images) on the web page of each source.

FREQUENCIES
We used the default setup at U and K bands, while al L, C and X bands the two IFs (50 MHz wide) were spread across the band, and exactly at 1.415, 1.665, 4.565, 4.935, 8.085, 8.465 MHz in order to improve the frequency coverage of each individual spectrum.

POLARIZATION
The observation on 020703 was long enough to allow a good calibration of the instrumental polarization, and then the source polarization at C and X band has been determined.  The data at L, U and K band need some more work before we  make the "numbers" available . Information is reported in each source page.

VLA observations log (Obs. time intervals are LST at the VLA)
 
Code date Config. Obs.Time Code date Config. Obs.Time Code date Config Obs.Time
A 980921 B J 000225 BnC S 040126 BnC 21:00-24:00
B 981107 BnC K 020703 B T 040127 BnC 01:30-06:00
C 981114 BnC L 030912 AnB U 040128 BnC 11:00-15:00
D 981219 C M 030913 AnB V 040130 BnC 20:00-22:00
E 990614 DnA N 030914 AnB W
F 990621 DnA O 030915 AnB X
G 990625 A P 031206 B Y
H 990925 A Q 031212 B Z
I 991015 BnA R 040122 BnC 01:00-03:00

 

Bright Sample (as from Dallacasa, Stanghellini, Centonza & Fanti R. 2000, A&A, vol. 363, p. 887). Sources highlighted have an individual web page.  A table with summary of flux densities is available
 
NAME ID z A B C D E F G H I J K L M N O P Q R S T U W X Y Z
0003+2129 X X X X
0005+0524 Q 1.887 X X X X
0037+0808 X X X X
0111+3906  G 0.668 X X X X X
0116+2422 X X X X
0217+0144  Q 1.715 X X X
0329+3510 X X X X
0357+2319 X X X X
0428+3259 X X X X
0519+0848 X X X X
0625+4440 X X X
0638+5933 X X X
0642+6758  Q 3.180 X X X
0646+4451  Q 3.396 X X X X
0650+6001  Q 0.455 X X X
0655+4100  G 0.02156 X X
0722+3722  Q 1.629 X X X
0927+3902  Q 0.695 X X X
1016+0513 X X X
1045+0624  Q 1.507 X X X
1148+5254  Q 1.150 X X
1335+4542  Q 2.449 X X X
1335+5844 X X X
1407+2827 BLRG 0.0769 X X X X X
1412+1334 X X X
1424+2256  Q 3.626 X X X
1430+1043  Q 1.710 X X X
1457+0749   X X X
1505+0326  Q 0.411 X X X
1511+0518  Sy1 0.084 X X X
1526+6650  Q 3.02 X X X
1603+1105 X X
1616+0459  Q 3.197 X X
1623+6624  Q? 0.203 X X X
1645+6330  Q 2.379 X X X
1717+1719 X
1735+5049 X X X
1751+0939 BLLac 0.322 X X
1800+3848  Q 2.092 X X X
1811+1704 X X
1840+3900  Q 3.095 X X X
1850+2825  Q 2.560 X X X
1855+3742 X X X
2021+0515 X X X
2024+1718 X X X X
2101+0341  Q 1.013 X X X
2114+2832 X X X
2123+0535  Q 1.878 X X X
2136+0041  Q 1.932 X X X X X
2203+1007 X X X X
2207+1652 X X X
2212+2355 X X X
2257+0243  Q 2.081 X X X X
2320+0513  Q 0.622 X X X
2330+3348  Q 1.809 X X X X

 

Weak Sample (Stanghellini, Dallacasa & Fanti R., 2004)
 
NAME ID z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
0736+4744 X
0754+3033 X X
0804+5431 X
0819+3823 X
0821+3107 X
0905+3742 X
0943+5113 X
0951+3451 X
0955+3335 X X
1002+5701 X
1004+4328 X X
1008+2533 X X
1020+2910 X
1020+4320 X X
1025+2541 X
1035+4230 X
1037+3646 X X
1044+2959 X
1046+2600 X
1047+3945 X
1052+3355 X X
1053+4610 X
1054+5058 X
1058+3353 X
1107+3421 X X
1109+3831 X
1135+3624 X X
1137+3441 X X
1203+4803 X
1218+2828 X
1239+3705 X
1240+2425 X X
1240+2323 X X
1241+3844 X
1251+4317 X
1258+2820 X
1300+4352 X
1309+4047 X
1319+4851 X
1321+4406 X
1322+3912 X
1330+5202 X
1336+4735 X
1352+3603 X X
1420+2704 X
1421+4645 X
1436+4820 X
1459+3337 X
1512+2219 X
1528+3816 X X
1530+2705 X X
1530+5137 X
1547+3518 X
1602+2646 X
1613+4223 X
1616+4632 X
1617+3801 X X
1624+2748 X
1651+3417 X
1702+2643 X
1719+4804 X