Vadim Burwitz EPIC Calibration Meeting October 2006, Mallorca
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from...
-
date post
21-Dec-2015 -
Category
Documents
-
view
214 -
download
0
Transcript of Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from...
![Page 1: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/1.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Cross-calibration results from observations of the
INS RX J1856RX J1856, and theWDs HZ 43HZ 43 and Sirius BSirius B
Vadim Burwitz
EPIC CAL/OPS May 4-5 2006, MPE
![Page 2: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/2.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Overview Absolute Calibration Soft X-rays
dependant on model spectra of WDs
what models to use?, uncertainties?
Analyse LETG + HRC-S data HZ 43A, Sirius B and RX J1856.5-3754
determine spectral parameters
improve effective area.
Compare obtained photon spectra with EUVE and ROSAT
and XMM (work by Frank Haberl)
![Page 3: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/3.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
NLTE pure H model spectrum of HZ43
Different bound-free and free-free absorption coefficients
-- Seaton
-- Karzas & Latter
![Page 4: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/4.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
NLTE pure H model spectrum of HZ43
![Page 5: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/5.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
HZ43 temperature vs. gravity
![Page 6: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/6.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
RX J1856-37 two temperature bb fit
![Page 7: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/7.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
RX J1856-37 two temperature bb fit
![Page 8: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/8.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Simultaneous fit to RXJ1856 and the WDs
![Page 9: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/9.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Simultaneous fit to RXJ1856 and the WDs
![Page 10: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/10.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
LETG + HRC-S effective areas
![Page 11: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/11.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Parameters obtained from fit
![Page 12: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/12.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Comparison of photon spectra
EUVE
![Page 13: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/13.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
RX J1856.5–3754: A `stable‘ neutron star
Individual fits
with
all parameters
free:
Simu
ltaneous fits
with
NH lin
ked:
Model:tbabs*bbody
from Frank Haberl
![Page 14: Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and.](https://reader035.fdocuments.us/reader035/viewer/2022062516/56649d635503460f94a45722/html5/thumbnails/14.jpg)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006
Summary