INTEGRAL Spectrometer SPI

1
INTEGRAL Spectrometer SPI First Imaging
Results from Commissioning Phase A. Strong,
MPE, 28 Nov 2002
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INTEGRAL Launch 17 Oct 2002 Commissioning Phase
Oct-Dec Ge cooling -gt 90K, Instrument
tuning Performance Validation started 7 Nov Empty
field 7 - 16 Nov First on-source data 17
Nov, Revolution 11 63000 sec hexagonal pattern,
centred on Cyg X-1 Full PV phase will give 1.9Ms
on Cygnus region -gt performance on sources, 26Al
etc line sensitivity (NB Crab first visible next
year continued PV phase)
Data at INTEGRAL Data Centre (ISDC) Geneva within
minutes. Raw data processed, remote access at
SPI institutes within 2 hours .
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SPI is Coded mask instrument, hence need
pointing strategy to - allow background
determination - improve coding over field of
view
2o
2o
Hex
5 X 5
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SPI Analysis methods spiros iterative
removal of sources correlation/likelihood
method, for sources
(Connell, Skinner Uni B'ham Toulouse) spiskyma
x maximum entropy skymapping for extended
emission/sources
(Strong, MPE)
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Maximum Entropy Images of Cygnus Region
INTEGRAL/SPI Revolution 11
25-100 keV
100-200 keV
d
Cyg X-3
40
35
Cyg X-1
30
305 300 295
305 300 295
a
a

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Maximum Entropy Images of Cygnus Region
INTEGRAL/SPI Revolution 11
25-100 keV
200-400 keV
50 40 30 20
d
310 300 290
310 300 290
a
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Maximum Entropy Cygnus
Revolution 11 Galactic Coordinates
INTEGRAL/SPI 25-100 keV
10
Cyg X-1
Galactic Latitude
0
Cyg X-3
-10
80 70 60 Galactic
Longitude

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INTEGRAL/SPI Revolution 11 spiros method
15-40 keV
Cyg X-3
Cyg X-1
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SPI Point Source Performance Rev 11, Exposure
63000 s spiros method
Cyg X-1 Position accuracy 0.4
arcmin E (keV) s 15- 40
272.9 40- 100 190.2 100-
200 68.9 200- 400 28.7
400- 700 3.7 700-1200
2.6 1200-2500 1.5
2500-8000 -1.5
Cyg X-3 Position accuracy 4.5 arcmin
E (keV) s 15- 40
27.2 40- 100 4.4 100-
200 1.1 200- 400 -0.8
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McConnell et al. 2002 CGRO
INTEGRAL/SPI Rev 11
11
First SPI Image of a GRB
IBIS GCN1706 20 sec duration 19h 47m 28.1o error
radius 0.5o IPN 19h 47.42m-.7 28.27o-.13 SPI
19h 44.7 m 28.15o
GRB021125
A.Strong, A. Rau, A.von Kienlin
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IBIS
13
SPI
IBIS