NUMBER: 564 MODULE: ccdmask SYSTEM: -V2.14.1 DATE: Fri Aug 22 09:27:06 MST 2008 FROM: valdes
BUG: The output mask from ccdmask is incorrect if the task has been run
previously without starting the executable fresh. The workaround
is to type "flpr ccdmask" before executing this task to force a
STATUS: Undiagnosed at present. Only the workaround has been defined.
NUMBER: 563 MODULE: imexpr SYSTEM: -V2.14 DATE: Tue Aug 12 15:12:04 MST 2008 FROM: valdes
BUG: Literal (quoted) strings cannot be used in expressions stored in the
expression database. The quotes are stripped and then the error is
that an operand by that name is not found. As a warning, single
quotes in the database are not interchangable with double quotes as
they are on the command line. They are interpreted as character
constants and something like 'abc' will be expanded to 'a bc'.
STATUS: Double quoted strings allowed in next release.
NUMBER: 562 MODULE: mscred.ccdproc SYSTEM: V4.8 DATE: Tue Aug 12 12:19:30 MST 2008 FROM: valdes
BUG: The fix for bug number 546 was not fully correct. It works for
binned data but results in an error for data which is flipped
(e.g. when CCDSEC/DETSEC have a starting column greater than
the ending column as in '[2048:1025,1:2048]'. The error
is that the resulting CCDSEC in the processed image will
be off by one. This can result is losing a column when
merging multiple amps.
BUG: The user supplied upper and lower data limits may be exceeded if
clipping is used. For instance, if the limits exclude all pixels
the clipping with behave as if no pixels are excluded. If not
all pixels are excluded and the clipping thresholds computed
(number of sigma * standard deviation) exceed the limit then
the clipping threshold is used. The only workaround is to not
use clipping if the limit values are supplied or check first
with no clipping to see if all pixels are excluded.
Friday, June 20 2008 @ 02:24 AM MDT Contributed by: fitz Views: 1015
This past week, iraf.net registered its 1,000th user. These are people who have taken the time to register after reading a help page, posting a message, or searching for an answer to a question. This excludes the dozen or so spam registrations I kill daily, and so 1000 users represents a legitimate estimate of the actual users of this site.
To each and every one of you: Thanks for your support. I hope you continue to find this site useful, and the future will be as bright as it appears now.
In this nine-day, hands-on program, participants will work with experienced NVO users and software specialists to become familiar with how to discover, access, visualize, and analyze data with the Virtual Observatory. Those attending will be introduced to VO tools and utilities by using them to accomplish a variety of research goals. Some of the research tasks that will be addressed include data mining, multiwavelength analysis, and temporal astronomy. In the latter part of the summer school, small teams will pursue their own VO-enabled projects.
"The National Virtual Observatory: Tools and Techniques for Astronomical Research", published as an ASP Conference Series Volume No. 382, is now available from the ASP website: http://www.astrosociety.org/CS382.html. The price is just $35 for 750 pages of VO goodness and includes a software CD.
This volume is a collection of the NVO Summer School lectures and tutorials. It includes a complete set of software libraries and worked examples to guide the astronomer/software developer through the process of developing VO-enabled programs in a variety of programming languages and scripting environments. It is an essential guide for those interested in combining data from diverse and distributed astronomical data collections, for accessing large astronomical survey databases, and for making available to the research community one's own data collections and catalogs. In addition, the introductory material describes the origin of the Virtual Observatory and its potential role in astronomical research. Several chapters that describe research results obtained by participants in the NVO Summer Schools using VO tools and technologies are also included.
You read it correctly, IRAF now runs on an iPod/iPhone. After all, a 400Mhz
CPU and >100Mb of RAM was a supercomputer back in the day, and the OS is
a Mac OSX 10.5 micro-kernel. Besides, it was too cool/absurd not to try it. The result is
an IRAF system (and external packages) capable of doing real science on an
iPhone/iPod, a first for astronomy.
The port itself was straightforward, the only hard part was building a cross-compiler to produce binaries for the ARM processor. Of course there's no native graphics or image display, but you can login to the device remotely and use an Xterm termiinal or XImtool/DS9 for the image display on your laptop. but is it really useful for anything other than impressing your friends? Only time will tell.
The system installs using the AppTapp installer on a jailbroken device, and is ready to run immediately.
See below for additional requirements and information, including benchmarks and screenshots.
BUG: For an image with a ZPN projection, the transform code in mwcs tries
to reference the parent image to get the PV matrix keywords. This task
called sk_decwcs() to open the WCS, but this routine then unmaps
the image. When the task later uses the saved 'mw' pointer to
transform coords the ZPN reference to the parent image is invalid
and results in a segfault. Changed the code to call sk_decim()
directly and operate on the currently open image instead.
There is no workaround other than to not set the 'usewcs' parameter
and to set the WCS using the other parameters. Contact iraf.net for
a new binary if needed.
For those of you who got an iPhone or iPod Touch recently, a new web app called iPortal is available for browsing the VO Registry
and Data services using only the native Safari browser.
To get started, point your iPhone/iPod to
A web page description with a
test interface and screenshots is also available. This app provides access to hundreds of image and catalog services, and thousands of published journal tables, from a mobile device. Image displays and table scrolling use the native interfaces of the device.