Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/external/xmm_sw_cal/icwg/presentations/cal_standards_collection.pdf Дата изменения: Fri Jun 16 03:04:04 2006 Дата индексирования: Sat Dec 22 15:26:57 2007 Кодировка: Поисковые слова: orion nebula

Working session on Standard Candles
Chair: F. Haberl · Definition of standard candles Sources with constant X-ray flux: white dwarfs isolated neutron stars supernova remnants cluster of galaxies · Scientific drivers for accurate absolute fluxes neutron star radii cosmology (e.g. total mass of galaxy clusters, Sunyaev Zeldovic effect) · Calibration purposes absolute flux calibration energy scale, energy resolution, (CCD) re-distribution regular monitoring of a suitable subsample of standard candles is recommended


Celestial Sources
White dwarfs Neutron stars HZ43 RXJ1856 Sirius B PSR0656 GD153

Supernova remnants

1E0102

N132D

Cas-A

non-thermal SNRs

Crab

G21.5

(3C58 5'x8')

PSR1509 Cluster of galaxies

0540-69

To be defined: bright, small, simple


Celestial Sources: usage by current missions
XMM Chandra Suzaku RXTE Swift INTEGRAL : : : : : : RXJ1856 1E0102 RXJ1856 1E0102 CAS A RXJ1856 1E0102 CAS A CAS A RXJ1856 1E0102 CAS A CAS A Crab G21.5 Crab Crab Crab Crab N132D GD153

"Laboratory" absolute standards
dedicated calibration mission new developments of X-ray sources useful for calibration

Standard candles and models
agreement on model parameters tabulate model to "save" it include statistical errors and differences between instruments "band of models"