Monday, April 25, 2005

xspec 12 diagnostics for reading files

v12 doesn't write out much helpful information when a file is rejected for some reason. Made a start at fixing this by adding diagnostic message output at chatter level 25 to OGIP_92aIO::fileFormat in DataFactory/OGIP-92aIO.cxx and DataUtility:readArrays in Data/DataUtility.cxx.

UPDATE: A better solution is to add a call to FITS::setVerboseMode in the chatter command code so that CCfits verbosity is turned on if chatter >= 25. This is now implemented in 12.2.0x.

Keywords: heasoft, xspec

Friday, April 22, 2005

xspec 11.3.2 patches

Added 3 patches for 11.3.2.

11.3.2a The new cfitsio seg faults on a call to ftgcvs if the column number is zero even if the input status is non-zero (and hence should just fall through). This broke reading type II pha files. I worked around the problem by modifying rdsfg2.f so it doesn't call ftgcvs with zero column number.

11.3.2b Roderick pointed out that under v12 model functions look for data in fgmodf but in v11 they use fgdatd. This makes it annoying for anyone trying to supply a local model for both versions. I fixed this by adding a fgmodf entry for v11 which returns the same directory as fgdatd.

11.3.2c The compps model seg faulted under Linux due to variables not being saved. I thought I'd caught all these but perhaps Juri added these after my last round of changes.

Keywords: xspec, heasoft

Wednesday, April 13, 2005


Nicastro et al. detect OVII and NVII lines from the WHIM on the line-of-sight to Mkn 421 using Chandra TOO observations when the source was in outburst. The measured baryon density is consistent with model predictions.

Berti et al. study what LISA will be able to determine from MBH inspirals.

Melbourne et al. present first results using laser guide star adaptive optics on Keck to do NIR imaging of GOODS sources. They have a NIR FWHM of ~0.1".

Kotov & Vikhlinin present XMM spatially-resolved temperature and density profiles of clusters in the range z=0.4-0.7.

Keywords: WHIM, GW, AGN, clusters

Thursday, April 07, 2005


Benacquista and Holley-Bockelmann look at LISA confusion noise from compact WD binaries.

Fusco-Femiano et al. analyze two BeppoSAX PDS observations of A2256 and find a hard X-ray signal consistent with that seen using RXTE.

Tod Strohmayer shows that the putative compact X-ray binary RX J0806.3+1527 has a spin-down rate of 3.77+/-0.8 x10^-16 Hz/s consistent with gravitational radiation losses.

Keywords: GW, clusters

Wednesday, April 06, 2005


Reed et al. include gas cooling in high res N-body simulations and find small groups of galaxies can form by z~30 unless prevented by feedback processes.

Murray et al. present the results of their 5ksec deep Chandra survey of the 9.3 sq deg Bootes field.

Vikhlinin provides an algorithm to predict measured temperatures when actually observing a multi-component thermal plasma.

Keywords: clusters, AGN, star formation

Monday, April 04, 2005


Wilson et al. find clusters in 0.09 < z < 1.6 using a R-[3.6] colour from Spitzer.

Colafrancesco calculates the SZ effect from ICM cavities.

Brueggen et al. calculate ICM bulk motion Doppler shifts and find that the kinetic luminosity of an AGN in the center of the cluster can be estimated with 10 eV spectral resolution instruments.

Miller et al. present the C4 catalog of 748 clusters of galaxies found in the SDSS Second Data Release which covers approximately 2600 square degrees.

Humphrey & Buote study the X-ray properties of a sample of 28 early-type galaxies. They find no evidence that the ISM is more metal-poor than the stars. They do find the low O to Mg abundance ratios seen in centers of groups and clusters and such they are due to an additional source of alpha-element enrichment, perhaps pop III.


Wyithe extends the log-linear relationship between SMBH mass and spheroid velocity dispersion to a log-quadratic relationship predicting much higher densities of very massive (>1e10) BHs.

Charbonneau et al. detect IR emission from the eclipsing planet TrES-1.

Deming et al. detect IR emission from eclipsing planet HD209458b. The find that high orbital eccentricity is unlikely ruling out the possibility of tidal heating causing the planet's anomalously large radius.

Ledlow, Owen & Miller have spectroscopically identified 77 new members of the Cygnus-A cluster bringing the total to 118. They suggest the system is a merger between two Abell richness class I clusters viewed at a projection angle of 30-45 degrees, 0.2-0.6 Gyrs before core passage.

Hamilton presents lectures on cosmological power spectrum estimation. The first covers basics and the second linear max. likelihood.

Melott et al. suggest that the late Ordovician mass extinction event may have been due to a Galactic GRB.

Keywords: SMBH, extrasolar planets