We present the results of two BeppoSAX broad band (0.1-200 keV) observations of the Z-source GX 340+0 comparing our results to those of a previous observation of the source. From the color-color diagram we selected three zones and extracted the source energy spectrum from each zone. We find that the model, composed by a blackbody plus a Comptonized component, absorbed by an equivalent hydrogen column of similar to 6 x 10(22) cm(-2), well fits the spectra in the energy range below 30 keV. At higher energies a power law component with photon index of 2.5 is observed. The associated flux decreases going from the horizontal branch to the flaring branch of the Z-track.
IARIA R, LAVAGETTO G, DI SALVO T, D'AI' A, BURDERI L, STELLA L, et al. (2006). Study of Two BeppoSAX Observations of GX 340+0. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS, 6, 257-261.
Study of Two BeppoSAX Observations of GX 340+0
IARIA, Rosario;LAVAGETTO, Giuseppe;DI SALVO, Tiziana;D'AI', Antonino;ROBBA, Natale
2006-01-01
Abstract
We present the results of two BeppoSAX broad band (0.1-200 keV) observations of the Z-source GX 340+0 comparing our results to those of a previous observation of the source. From the color-color diagram we selected three zones and extracted the source energy spectrum from each zone. We find that the model, composed by a blackbody plus a Comptonized component, absorbed by an equivalent hydrogen column of similar to 6 x 10(22) cm(-2), well fits the spectra in the energy range below 30 keV. At higher energies a power law component with photon index of 2.5 is observed. The associated flux decreases going from the horizontal branch to the flaring branch of the Z-track.
| File | Dimensione | Formato | |
|---|---|---|---|
|
2006ChJAS___6a_257I.pdf
accesso aperto
Dimensione
587.39 kB
Formato
Adobe PDF
|
587.39 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
