The Social Network Outburst - INAF

The Social Network Outburst:
A Multiwavelength perspective
on the 2015 V404 Cyg outburst
Gregory R. Sivakoff (U. Alberta), Diego Altamirano,
Christian Knigge (Southampton), James MillerJones (ICRAR – Curtin) on behalf of many others
Image Credit:Tetarenko+2015 (UAlberta), in prep
Movie Credit: Miller-Jones+2015 (Curtin), in prep
Coordination Enabled By
Alex Tetarenko
2nd Yr PhD
Arash Bahramian:
Final Yr PhD
Among Many Others
Jet Acceleration And Collimation
Probe of Transient X-Ray Binaries
James Miller-Jones (ICRAR-Curtin)
Gregory Sivakoff (U Alberta)
Diego Altamirano (U Southampton)
Tomasso Belloni (INAF – OAB)
Peter Curran (ICRAR-Curtin)
Vivek Dhawan (NRAO)
Rob Fender (Oxford)
Sebastian Heinz (U Wisconsin)
Elmar Körding (Radboud U Nijmengen)
Hans Krimm (NASA GSFC)
Dipankar Maitra (Wheaton College)
Sera Markoff (U Amsterdam)
Simone Migliari (ESA Madrid)
Ron Remillard (MIT)
Michael Rupen (DRAO)
David Russell (NYU Abu Dhabi)
Thomas Russell (ICRAR-Curtin)
Craig Sarazin (U Virginia)
Roberto Soria (ICRAR-Curtin)
Alex Tetarenko (U Alberta)
Valeriu Tudose (ASTRON)
Accretion – Jet Coupling
H1743-322:
NASA/GSFC & G. Sivakoff et al.
X-Ray Binary
Relativistic
Jet
Compact Object
(Black Hole
Or Neutron Star)
Accretion
Disk
Donor Star
R. Hynes
“Simple” Multi-λ View Of XRBs
S. Markoff et al. (2007) & NASA/CXC M.Weiss
Why All the Fuss?
The Fuss: 68 ATels, 15 GCNs, 3 Press Releases
Known distance, companion type, BH mass,
system inclination
Northern Summer (non-teaching) nighttime object
It got VERY Bright VERY quickly.
New facilities / capacities since last great BH
outburst
New modes of collaboration / communication
A Multi-Wavelength View
Undergoes many >5 Crab flares for ~ 11 days
(peaking at ~50 Crab)
then decays with flares for ~ 39 - 54 days
Credit: V404MWC+2015
A Multi-Wavelength View
Credit: V404MWC+2015
A Multi-Wavelength View
Credit: V404MWC+2015
Decay Overview
“Quiescent” level hit after ~ 50 days
Credit: Sivakoff+2015 (UAlberta)
Updated from ATel 7788
Broad Wavelength Coverage
150 MHz – 10 TeV
Credit:
deneb.astro.warwick.ac.uk/phsaap/v404cyg/data/
Strict Multi-Wavelength
Simultaneity
Credit: Gandhi+2015 (Southampton)
ATel 7686
Credit: Gandhi+2015 (Southampton)
ATel 7727
Strict Multi-Wavelength
Simultaneity
We’re suffering from Black Hole Jet Lag
Flux Density (mJy/bm)
104
Also detected at
31σ at 341 MHz
over 4 hrs.
Time series to
come.
103
102
57195.45
57195.55
Time (MJD)
57195.65
Credit: Tetarenko+2015 (Alberta)
Update from ATel 7708
Strict Multi-Wavelength
Simultaneity
Very preliminary, but:
we see jet ejecta; different
speeds; potential different
launching angle
Credit: Miller-Jones+2015 (Curtin)
in prep
Strict Multi-Wavelength
Simultaneity
“Strange” sub-mm
shape ~ 1day past
peak
Credit: Tetarenko+2015b (Alberta)
Nature 01/1990 News and Views
Final Paragraph
Social Media
Final Paragraph
Mailing List/Web
Credit:
deneb.astro.warwick.ac.uk/phsaap/v404cyg/data/
Mailing List/Web
[email protected]:
(Thanks to Christian Knigge for starting this)
≥114 messages (and I’m only responsible for 28)
≥132 subscribers
http://deneb.astro.warwick.ac.uk/phsaap/v404cyg/
data/
(Thanks to Tom Marsh for starting this)
≥119 public submissions
≥577 observing windows
Automated Triggering:
Rise of the Machines
We need to minimize need
for human intervention!
Credit: Fender+2015 (Oxford)
4pisky.org
Regular “Quiescent”
Monitoring Caught Precursor
Faulkes Telescope North
and LCOGT's 1-m at
Mcdonald Observatory
Credit: Bernardini+2015 (NYU Abu Dhabi)
ATel #7761, and in prep
Continuous Monitoring:
Integral (& others) Stare at V404
Incredible potential of continuous monitoring.
Credit: Rodriguez+ 2015
Smaller Telescope Buy-in
From a
0.3m (12”)
telescope at
Wheaton
College
Observatory
Spectral Shape Change
Credit: Scarpaci+2015 (Wheaton)
ATel #7737, and in prep
Larger Telescope Buy-in
Chandra 6/23 light curve
Huge Chandra flares mistaken for solar flares
Credit: Altamirano,King,Neilsen+2015
VLA
Flux Density (mJy)
7 GHz
14 GHz
100
Flexible Response +
UV/X-ray coverage
14
V filter
B filter
U filter
15
10-15
10
UVW1 filter
UVW2 filter
UVM2 filter
16
1010-16
17
10-17
10
XRT
Luminosity (erg/s)
X-ray Luminosity
(erg s-1)
UVOT fλ
cm2 A-1)
(erg s-1UVOT
Flux Density (erg s 1cm 2A 1)
1010-14
21 GHz
26 GHz
34
101034
33
101033
Swift XRT/UVOT
57204
57204
57206
57206
57208
57210
57208
MJD 57210
Time (MJD)
Credit: Sivakoff+2015 (Alberta)
ATel 7788
57212
57212
57214
57214
Summary
Most interesting BH outburst in >10 years.
Strong community response, both in data
collected and potential for collaboration.
Need more time to determine science results
from multi-wavelength and full lessons
learned, but…
Some Lessons Learned
1.  Broad wavelength coverage is essential for
unlocking physics, but it takes time.
2.  Rapid automated response is crucial.
3.  Long continuous stares can fill in missing
parts from most monitoring campaigns.
Some Lessons Learned
4.  Subarrays and other simultaneous observing
modes provide great value.
5.  VLBI-imaging can reveal incredible views.
6.  Coordinated sub-mm data can show
increased variability and get closer to the
action compared to cm data.
Some Lessons Learned
7)  We need to be more organized for next
similar campaign!!!
Community is forming the
Simultaneous Multiwavelength Astronomy
Research in Transients NETwork
(SMARTNet)
http://www.isdc.unige.ch/SMARTNet
to address this need across astrophysical
source types!