1. Radio and X-rays from GRS1915+105
Alien!
Radio and X-rays from GRS
Close Correlations of the Third Kind
Ralph Spencer and Tony Rushton
JBCA, The University of Manchester

2. Type 1 Type 2 Plateau Low/hard X-ray Flaring “C” state Soft High or
Intermediate
State
23 mas/day

3. 10 years of monitoring

4. 14 Merlin runs - 4 have extended jets following an X-ray flare
Date
X-ray flare
(MJD)
Motion
mas/day
1998June09
50967
27±3
2003Mar06
52694
18 ±2
2003Apr18
52733
16.5 ±1
2003June15
52788 or
52792
17.5 ±1
23.5 ±1
Type 1
See Rushton et al MNRAS 2010

5. Hardness
X-ray counts
Ryle radio
1996
2006

6. Type 2 !

7. 1999
2005
Type 3 ?
Rushton et al 2010 in prep.

8. Summary Type 1: Type 2: Type 3
Relativistic jets ejected following a state change and X-ray flare – related to disc formation and evolution
Apparent velocity varies – angle change?
Type 2:
Close correlation with X-rays in plateau state: strong coupling between accretion (ADAF) and radio strength (unlikely) or X-rays from same electrons (synchrotron?)
Type 3
Long term (~1 yr) cyclic behaviour – thermal timescale of equatorial disc? Magnetic dynamo timescale of companion? Synodic variations due to a 3rd body? Mystery!

9. Questions ?