HQM - Hamburg Quasar Monitoring

Object List

R

V

2251+158
HQM
monitoring 2251+158
R
Data
Literature (CDS) Properties
FK5 2000.0 Coordinates
22 53 57.75
+16 08 53.6
FK4 1950.0 Coordinates
22 51 29.53
+15 52 54.2
B magn, V magn
16.57
16.10
z  
.859
type  
Blazar
Alternative Identifiers QSO B2251+158 J225357.7+160853
  3C 454.3 4C 15.76
  DA 586 2E 4646
  OHIO Y 185 OY 185
  NRAO 701 WK 463
  PKS 2251+158 LEDA 2819327
HQM Properties
total No. of Observations
198
33
observations from ... to
31.07.1990
06.09.2000
Sampling rate/ intervall (days)
11.78
342.16
R magn.
15.708
HQM observational priority
2
(1=high, 9=low)
Selection criteria HQM
3C454.3,HLQ,Var(2.0,1900-70,n=40,nReso; 1.5,1940-68,n=30,nReso(long), Reso(short:few month); 1.5,1966-85,n=200,Reso(some short periods)
Remarks:  
 
4/1989 until 3/1992
2251+158 1989-1992
Johnson R
August 1991
2251+158 August 1991
Johnson R
JOMPQ campaign September 1994
2251+158 Sept 1994 R
Johnson R
  • Dots: HQM-Group at Calar Alto, Spain
  • Diamonds: Finnish Group at NOT, La Palma, Spain
  • Stars: Yunnan Observatory, China
  • Triangles: Polish Group at Las Campanas
  • O-dots: Heidelberg at ESO
  • Clubsuits: Heidelberg Group, Heidelberg

2251+158 (Johnson V)

V
Data
JOMPQ campaign September 1994
2251+158 Sept 1994 V
Johnson V
  • Dots: Finnish Group at NOT, La Palma, Spain

 

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contact: Jochen Schramm, Hamburger Sternwarte