Notes on the 6th IACHEC Working Groups teleconference 26-Feb-2010, Skype Participants: V.Burwitz (VB), M.Guainazzi(MG), H.Marshall (HM), J.Nevalainen (JN), P.Plucinsky (PP), A.Pollock (AP), M.Tsujimoto-Careca (MTC) Apologies: M.Ishida (MI), F.Haberl (FH), S.Sembay (SS) 1.Organization of the 5th IACHEC meeting ================================= The organization is in good shape. The contract was signed. The registration web page has been set-up. Not many pre-registrations were submitted so far: 16 in total, two third of them from SAO. Although many participants will probably wait till the very last moment to submit their pre-registration, some additional efforts should be made to ensure that key actors are present at the meeting. The following targets have been identified (in brackets the Working Group Chair in charge to contact her/him) - One representative of the Astro-H calorimeter group (TM) - Keith Gendrau (PP) - Keith Jahoda (also for Goddard; HM) - Slava Zavlin (VB) - Martin Weisskopf (HM) There have been suggestions for additional sessions: 1. How not to calibrate a telescope, or, Lessons learned from Previous Calibration (Jerius) 2. The pitfalls and techniques for cross-calibration (Jerius) 3. CTI measurement techniques (Grant) 4. Contamination (Pollock) Including all these additional topics may imply some re-shuffling or the original program structure. MG will put together a first draft of the meeting program early next week, on the basis of these suggestions and of the pre-registration arrived so far. 2. Status of IACHEC papers ========================== 1E0102 ----------- The WG met recently. The data are being re-analyzed to include a recent update of the RGS and Chandra contamination models. First results of the application of the latter show an improvement of the agreement between ACIS-S3 and RGS. Extension of this work to HRC and ACIS-S1 is ongoing. A plan leading to the publication of these results will be laid down at the 5th IACHEC. Blazar Chandra/XMM-Newton sample -------------------------------- A re-analysis of the sample with the new Chandra contamination model is underway, This is the last step before the publication of the results. Cluster ------- Reanalysis of the whole sample with the latest Chandra contamination model yields an excellent agreement in the determination of the temperatures, as well as some scatter in the relative fluxes. This is probably at least in part due to the extended nature of the sources. The extraction regions are being revised. On the average, the hard band fluxes determined by ACIS are 10% larger then EPIC. The paper should be submitted by March. WG Chairs are encouraged to comment on a draft, that JN will circulate as soon as it is in a stable state. G21.5-0.9 --------- A second version of the draft has been recently circulated. It includes data from XMM-Newton/EPIC, Chandra/ACIS, Suzaku, Integral/IBIS. RXTE/PCA has been dropped so far (HM will investigate with K.Jahoda if somebody from the PCA Team is still interested in working on this); spectra from Swift are awaited. So far there is an excellent agreement in spectral shape between ACIS and EPIC, an excellent agreement in flux between Suzaku and EPIC, while the ACIS fluxes are about 10% larger then EPIC. A soft excess at energies lower than the soft photoelectric cut-off is instrument-dependent. PKS2155-304 ----------- There are not much news on this paper. MG will contact MI - who is rather busy with other commitments in this moment - to offer support from Chandra (MIT) and XMM-Newton (ESAC). Next meeting ============ March 10, 13:00 GMT, with the goal of finalizing the 5th IACHEC meeting program.