MICROQUASARS
Adapted from J. M. Paredes and J. Martí, Contribution to Science, 2 (3): 303-314 (2003):
The concept of microquasars refer to a new kind of X-ray binary stars in our Galaxy, one with the ability to generate collimated beams, or jets, of relativistic plasma. The ejection takes place in a bipolar way perpendicular to the accretion disk associated with the compact star, a black hole or a neutron star. The word ‘microquasar’ was chosen due to the extraordinary analogy between these astronomical objects and quasars and other active galactic nuclei (AGNs) at cosmological distances. This analogy will be discussed later. The relativistic jets of plasma are probably the most reliable fingerprints of microquasar sources. The first microquasar discovered was the system SS 433. For many years, it was considered a mere curiosity in the galactic fauna. Galactic microquasars are one of the most recent additions to the field of high energy astrophysics and have attracted increasing interest over the last decade. They are now primary targets for all space-based observatories working in the X-ray and γ-ray domains.
A
catalog
Name |
Position (J2000.0) |
Spectral type |
Magnitude |
Activity |
Orbital period (d) |
Scorpius X-1 |
16h19m55s.09 |
Subgiant |
12.2 |
Periodic |
2.8 |
GRO J1655–40 |
16h54m00s.16 |
F5IV |
14.2 - 17.3 |
Transcient |
2.6 |
V4641 Sgr |
18h19m21s.63 |
B9III |
8.5 - 13.5 |
Transcient |
2.8 |
LS 5039 |
18h26m15s.06 |
O6.5V |
11.2 |
Periodic |
4.1 |
SS 433 |
19h11m49s.57 |
A |
14.2 |
Periodic |
13.1 |
Cygnus X-1 |
19h58m21s.68 |
O9.7Iab |
8.95 |
Periodic |
5.6 |
Scorpius
X-1
Download:
_scorpiusx-1_20120525_022.fit
V4641 Sgr
Field of microquasar V4641 Sgr (LISA guiding camera - Atik 314L+, 30 sec. exposure) - V = 13.3
Download: _v4641sgr_20120514_070.fit
LS 5039
Field of microquasar LS
5039 (LISA guiding camera - Atik 314L+, 30 sec. exposure) - V = 11.2
Download: _ls5039_20120514_018.fit
SS 433
(V1343 Aql)
The
2D near infrared spectrum of SS433 before sky removal. June 16.05, 2012 obsertaion
- C11 + LISA IR spectrograph - 10 x 600 sec. exposure.
Note the presence
of natural OH and O2 bands + sky pollution HPS lamps spectrum. For more details
click
here. Click on the image for enlarge.
Download:
_ss433_20120525_108.fit
Download:
_ss433_20120525_948.fit
Download:
_ss433_20120529_051.fit
Download:
_ss433_20120530_974.fit
Download:
_ss433_20120613_947.fit
Download:
_ss433_20120615_915.fit
Download:
_ss433_20120616_047.fit
Cygnus
X-1
Download:
_cygnusx-1_20120525_067.fit
Download:
_cygnusx-1_20120529_101.fit