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J/A+A/368/267    Spatially resolved spectroscopy of Cas A     (Maccarone+, 2001)

Spatially resolved spectroscopy of Cassiopeia A with MECS on board Beppo-SAX. Maccarone M.C., Mineo T., Preite-Martinez A. <Astron. Astrophys. 368, 267 (2001)> =2001A&A...368..267M
ADC_Keywords: Supernova remnants ; X-ray sources ; Abundances Keywords: ISM: SuperNova remnants - X-rays: ISM - methods: data analysis - techniques: image processing, spectroscopic - IMS: individual: Cas A Abstract: We have performed the first detailed spatially resolved spectroscopy of Cas A in the 1.6-10keV energy range, using data taken with the Medium Energy Concentrator Spectrometer (MECS) on board the BeppoSAX Observatory. The well calibrated point spread function in the central region of the MECS allowed us to perform a spatial deconvolution of the data at full energy resolution. We eventually generated a set of spectra, covering a region of ∼3' radius around the centre of Cas A. The data used were obtained on Aug 1996, Sep 1996 and Nov 1997. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 23 23 24.0 +58 48 54 Cas A = SNR 111.7-02.1 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 126 187 Results obtained fitting the 182 spectra with a non-equilibrium ionisation plasma model
See also: J/ApJ/441/307 : Proper motions and brightness of Cas A (Anderson+ 1995) J/ApJ/456/234 : Cas A radio knots spectral indices (Anderson+ 1996) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 pix Xpos X position (1pix = 8arcsec) 5- 7 I3 pix Ypos Y position (1pix = 8arcsec) 9- 12 F4.2 10+22cm-2 NH ? Hydrogen column density (1) 13 A1 --- u_NH Uncertainty flag on NH 15- 18 F4.2 10+22cm-2 e_NH ? rms uncertainty on NH 21- 24 F4.2 keV kT ? Energy parameter, kT (1) 25 A1 --- u_kT [:] Large uncertainty on kT 27- 30 F4.2 keV e_kT ? rms uncertainty on kT 32- 36 F5.2 [s/cm3] log(net) ? Ionisation parameter, log(n_e_t) (1) 37 A1 --- u_log(net) [:] Large uncertainty on log(net) 39- 42 F4.2 [s/cm3] e_log(net) ? rms uncertainty on log(net) 44- 48 F5.2 Sun Si ? Si abundance ratio with respect to reference values (1) (2) 49 A1 --- u_Si [:] Large uncertainty on Si 51- 55 F5.2 Sun e_Si ? rms uncertainty on Si 57- 61 F5.2 Sun S ? S abundance ratio with respect to reference values (1) (2) 62 A1 --- u_S [:] Large uncertainty on S 64- 67 F4.2 Sun e_S ? rms uncertainty on S 69- 73 F5.2 Sun Ar ? Ar abundance ratio with respect to reference values (1) (2) 74 A1 --- u_Ar [:] Large uncertainty on Ar 76- 80 F5.2 Sun e_Ar ? rms uncertainty on Ar 82- 86 F5.2 Sun Ca ? Ca abundance ratio with respect to reference values (1) (2) 87 A1 --- u_Ca [:] Large uncertainty on Ca 89- 92 F4.2 Sun e_Ca ? rms uncertainty on Ca 94- 98 F5.2 Sun Fe ? Fe abundance ratio with respect to reference values (1) (2) 99 A1 --- u_Fe [:] Large uncertainty on Fe 101-104 F4.2 Sun e_Fe ? rms uncertainty on Fe 106-110 F5.2 Sun Ni ? Ni abundance ratio with respect to reference values (1) (2) 111 A1 --- u_Ni [:] Large uncertainty on Ni 113-117 F5.2 Sun e_Ni ? rms uncertainty on Ni 119-122 F4.2 --- chi2 chi2 value of the model 124-126 I3 --- DOF Degree of freedom of the model
Note (1): A dash replaces values that was impossible to constrain to a statistically significant level. Note (2): Reference values (solar abundance by number) used in the fitting model are (H=1): Si = 3.77*10-5, S =1.94*10-5, Ar=3.45*10-6, Ca = 2.30*10-6, Fe=3.38*10-5, Ni=1.86*10-6. Quoted errors are one standard deviation.
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Jan-2003
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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