# Presentation: 226788

## UCB Space Sciences Laboratory 

- UCB Space Sciences Laboratory
- SPI Instrument Team Activities
- Prof. Steven Boggs (PI)
- Dr. Cornelia Wunderer (SPI CoI)
-  Dr. Emrah Kalemci
- Mark Bandstra (student)
*INTEGRAL Users Group Mtg. July 15, 2005*

## UCB Instrument Activities:

-  Implement the use of PSD information to characterize and correct for radiation damage in SPI spectral response.
-  Study the characteristics and rejection techniques for the spurious 1.4-1.6 MeV background ‘lines’ due to electronic noise
-  Understand SPI multiple-detector background (ME) for background and polarization studies.
-  Characterize the SPI sensitivity to polarization and determine systematics affecting potential measurements.
-  Characterize the RHESSI background using the MGGPOD suite (GSFC/CESR) to further understand the SPI background.

## UCB Science Activities:

-  Joint SPI/RHESSI 26Al, 60Fe analysis for diffuse component
-  Redshifted 2.2 MeV search – NS gravitational redshift
-  Polarization (GRBs, Crab?, Cyg X-1?)
-  Joint solar flare analysis with RHESSI
**w/ full or partial GOP support:**
-  SN1006 (w/ Reynolds, Milne)
-  GRB timing – probe energy scales at the Planck mass
-  GRB polarization (w/ Kouveliotou)

## Proceedings/Publications

- 1. L. Bouchet, et al., “SPI/INTEGRAL observation of the Cygnus region,” Astronomy and Astrophysics, Vol. 411, pp. L377-L382 (2003).
- 2. P. Jean, et al., “SPI Instrumental background characteristics,” Astronomy and Astrophysics, Vol. 411, pp. L107-L112 (2003).
- 3. J.P. Roques, et al., “SPI/INTEGRAL in-flight performance,” Astronomy and Astrophysics, Vol. 411, pp. L91-L100 (2003).
- 4. G. Vedrenne, et al., “SPI: The spectrometer aboard INTEGRAL,” Astronomy and Astrophysics, Vol. 411, pp. L63-L70 (2003).
- 5. Wunderer, C.B., et al., “A Preliminary Exposure-Map Based Comparison of SPI and RHESSI 26Al Flux Measurements” , Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 909 (2004).
- 6. Wunderer, C.B., Smith, D., Weidenspointner, G., “Modelling of the Detector Background Spectrum for the Low-Earth Orbit Ge Spectrometer RHESSI with MGGPOD,” Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 913 (2004).
- 7. Kalemci, E., Boggs, S., Wunderer, C., Jean, P., “Background in the multiple events (ME) of INTEGRAL/SPI” , Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 855 (2004).
- 8. Kalemci, E., Boggs, S., Wunderer, C., Jean, P., “Measuring polarization with SPI on INTEGRAL,” Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 859 (2004).
- 9. Diehl, R., et al., “Al(26) Studies with INTEGRAL's Spectrometer SPI,”  Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 27 (2004).
- 10. Knoedlseder, J., et al., “Search for gamma-ray line emission from the radioactive decay of 60Fe with SPI,” Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 123 (2004).
- 11. Knoedlseder, J., et al., “SPI/INTEGRAL observation of 1809 keV gamma-ray line emission from the Cygnus X region,” Proc. 5th INTEGRAL Workshop, Eds. , ESA SP-552, ISBN , 33 (2004).

## Posters/Presentations

- 1. C. Wunderer, et al., “An Exposure-Map Based Comparison of the 26Al Fluxes Measured by SPI and RHESSI,” 5th INTEGRAL Workshop, Munich, Germany, February 2004.
- 2. C. Wunderer, et al., “Modelling of the Detector Background Spectrum for the Low Earth Orbit – Ge Spectrometer RHESSI with MGGPOD,” 5th INTEGRAL Workshop, Munich, Germany, February 2004.
- 3. E. Kalemci, et al., “Background in the Multiple Events (ME) of SPI/INTEGRAL,” 5th INTEGRAL Workshop, Munich, Germany, February 2004.
- 4. E. Kalemci, et al., “Measuring Polarization with SPI on INTEGRAL,” 5th INTEGRAL Workshop, Munich, Germany, February 2004.
- 5. E. Kalemci et al., "Measuring Polarization with the INTEGRAL Observatory", X-Ray Polarimetry Workshop, SLAC, Stanford, CA, February 2004.
- 6. C. Wunderer, et al., "A systematic study of GRB millisecond flares at MeV energies aiming to constrain Quantum Gravity, " HEAD Meeting, New Orleans, September 2004.
- 7. E. Kalemci, et al., "Hard X-rays observations of SN 1006 with INTEGRAL", 2004, HEAD Meeting, New Orleans, September 2004.
- 8. C. Wunderer, "Unraveling our Origins through Gamma-Ray Astronomy," MIT Astrophysics Colloquium, February 2005.
- 9. C. Wunderer, "Unraveling our Origins through Gamma-Ray Astronomy," UC Berkeley Astrophysics Seminar, February 2005.
- 10. E. Kalemci et al., "INTEGRAL Observations of SN1006", 205th AAS Meeting, San Diego, January 2005.

## SPI Team Meeting Presentations

- 1. E. Kalemci, S. Boggs, "Characterization of radiation damage before and after the annealing using the PSD", SPI Scientific Team Meeting, MPE, Garching, Germany, April 2003.
- 2. E. Kalemci et al., "The distribution of SPI background events in lines and continuum for the singles and the multiples", SPI Scientific Team Meeting, CESR, Toulouse, France, June 2003.
- 3. C. Wunderer, et al., Paris, “Combining SPI and RHESSI Measurements to constrain the spatial distribution of 26Al,” Paris, Oct. 8-9, 2003.
- 4. E. Kalemci, S. Boggs, "Characterizing the effects of radiation damage before and after the second annealing using the PSD information", SPI Scientific Team Meeting & SPI/IBIS Joint Meeting, IAP, Paris, France, October 2003.
- 5. E. Kalemci, S. Boggs, C. Wunderer, "Polarization capabilites of SPI & IBIS instruments", SPI Scientific Team Meeting & SPI/IBIS Joint Meeting, IAP, Paris, France, October 2003.
- 6. C. Wunderer, et al., “Millisecond Time Structures of GRBs,”  Toulouse, June 7-9, 2004.
- 7. C. Wunderer, et al., "Light Bucket/ Exposure Map - Approach to 26Al with SPI,” Toulouse, June 7-9, 2004.
- 8. E. Kalemci et al., "Search for gravitationally red-shifted 2.2 MeV line from selected neutron stars", SPI Scientific Team Meeting, CESR, Toulouse, France, June 2004.
- 9. E. Kalemci et al., "Study of coincidence lines in ME", SPI Scientific Team Meeting, CESR, Toulouse, France, June 2004.
- 10. C. Wunderer & S. Boggs, “The electronic noise background feature at 1.4-1.6 MeV, ” Munich, Oct. 2004.
- 11. E. Kalemci et al., "INTEGRAL Observations of SN1006", INTEGRAL Internal Meeting at ESTEC, Noordwijk, Netherlands, January 2005.
- 12. C. Wunderer & S. Boggs, “Further characterization of the electronic noise feature at 1.4-1.6 MeV,” Rome, March 2005.