#astrotools — Public Fediverse posts

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is asdftool. ASDF (Advanced Scientific Data Format) is a proposed next generation interchange format for scientific data. ASDF aims to exist in the same middle ground that made FITS so successful, by being a hybrid text and binary format: containing human editable metadata for interchange, and raw binary data that is fast to load and use. Unlike FITS, the metadata is highly structured and is
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is asdftool. ASDF (Advanced Scientific Data Format) is a proposed next generation interchange format for scientific data. ASDF aims to exist in the same middle ground that made FITS so successful, by being a hybrid text and binary format: containing human editable metadata for interchange, and raw binary data that is fast to load and use. Unlike FITS, the metadata is highly structured and is
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is asdftool. ASDF (Advanced Scientific Data Format) is a proposed next generation interchange format for scientific data. ASDF aims to exist in the same middle ground that made FITS so successful, by being a hybrid text and binary format: containing human editable metadata for interchange, and raw binary data that is fast to load and use. Unlike FITS, the metadata is highly structured and is
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is asdftool. ASDF (Advanced Scientific Data Format) is a proposed next generation interchange format for scientific data. ASDF aims to exist in the same middle ground that made FITS so successful, by being a hybrid text and binary format: containing human editable metadata for interchange, and raw binary data that is fast to load and use. Unlike FITS, the metadata is highly structured and is
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is alfa. ALFA measures fluxes in emission line spectra, such as those of planetary nebulae and HII regions, using a genetic algorithm to rapidly optimise fits to large numbers of lines simultaneously. It can subtract night sky emission lines before fitting the nebular lines if necessary. It can read plain text files containing 1D spectral data, or FITS files containing 1D, 2D or 3D datasets.
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is wcstools. WCSTools is a set of software utilities, written in C, which create, display and manipulate the world coordinate system of a FITS or IRAF image, using specific keywords in the image header which relate pixel position within the image to position on the sky. Auxiliary programs search star catalogs and manipulate images.

This package contains the binary tools.
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is astronomical-almanac. The aa program computes the orbital positions of planetary bodies and performs rigorous coordinate reductions to apparent geocentric and topocentric place (local altitude and azimuth). It also reduces star catalogue positions given in either the FK4 or FK5 system. Data for the 57 navigational stars is included. Most of the algorithms employed are from The Astronomical
1/3⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is rawtran. Rawtran is an utility to convert of raw photos in .CR2, .CRW, MRW, NEF, RAF, etc. formats to the general astronomical FITS image format. The identification of raw photo type and decoding itself is done via DCRAW utility by D.Coffin.

http://integral.physics.muni.cz/rawtran/

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is casacore-tools. The casacore package contains the core libraries of the old AIPS++/CASA (Common Astronomy Software Applications) package. This split was made to get a better separation of core libraries and applications.

This package contains the tools built with CASA core:

* taql - query language for casacore tables
* measuresdata - create data tables for measures
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is libcfitsio-bin. FITS (Flexible Image Transport System) is a data format most used in astronomy. cfitsio is a library of ANSI C routines for reading and writing FITS format data files. A set of Fortran-callable wrapper routines are also included for the convenience of Fortran programmers.

This package contains utility programs, based on CFITSIO, namely fitscopy, fpack and funpack.
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware

Random #Debian Astro package of the week is astropy-utils. The astropy package contains core functionality and some common tools needed for performing astronomy and astrophysics research with Python.

This package contains the tools that come with astropy:

* fitscheck: Detect and fix FITS standards violations
* fits2bitmap: Create a bitmap file from a FITS image.
* fitsdiff: Compare two FITS image files and report the differences in
1/2⤵

#AstroTools #AstronomySoftware #ScienceSoftware #DebianBookworm

Random #Debian Astro package of the week is funtools. Funtools, is a "minimal buy-in" FITS library and utility package developed at the High Energy Astrophysics Division of SAO. The Funtools library provides simplified access to a wide array of file types: standard astronomical FITS images and binary tables, raw arrays and binary event lists, and even tables of ASCII column data.
1/2⤵

This package contains the asdf command line tool.

https://github.com/asdf-format/asdf

#AstroTools #AstronomySoftware #ScienceSoftware #DebianBookworm
2/2

Because XPA works both at the programming level and the shell level, it is a powerful tool for unifying any analysis environment: users and programmers have great flexibility in choosing the best level or levels at which to access XPA services, and client access can be extended or modified easily at any time.

This package contains the additional tools.

https://hea-www.harvard.edu/RD/xpa/

#AstroTools #AstronomySoftware #ScienceSoftware #DebianBookworm
2/2

Some tricks to analyse astronomical images with JS9 from SDSS DR12 data.

Open https://www.legacysurvey.org/viewer
Point at: 249.135696 39.027874
Search at the right menu in the SkyViewer "+More surveys", click it and choose SDSS data.

Left click at the center of the object
Right click on Data > new window
Right click on Detail > new window > search the object in the JPG quick look image.

If there is not the object, choose another link at the Detail page.

When you found the object, down the JPG there are the links from which you can download the image in the compressed format .bz2 (you can unpack it, for example, with 7-zip).

Open https://js9.si.edu/
Menu File > open local > load the FITS image

All of the other instructions are identical as in the case about DECaLS images.

#astrotools

Some tricks to analyse astronomical images with JS9 from DECaLS data.

Open https://www.legacysurvey.org/viewer
Point at: 249.135696 39.027874
Left click at the center of the object
Right click on Data > new window
Right click on Coadded Images > new window
Copy the link for the FITS file named as "legacysurvey-XXX-image-g.fits.fz"
Open https://js9.si.edu/
Menu File > open remote > paste the URL
Menu zoom > zoom to fit
Menu scale > data limits > scale z1/data max
Menu color > turbo
Menu view > Magnifier
Menu view > Bin/Filter (enlarge its window)
Use the Magnifier to point at the center of the object
Read and copy the coordinates (find them down the menu bar) into the Bin panel and choose a Size > Get Data
Menu zoom > zoom to fit
Menu scale > Log
Menu scale > data limits... > data min/max
Menu color > more colormaps > color
Menu color > invert
Menu analysis > blur=1
Explore the flux levels from the Magnifier
Menu scale > histeq
Explore the morphology from the Magnifier

#astrotools

A tool for image analysis on the web: https://js9.si.edu/

Follow me for many images.

With images taken by PanSTARRS you can load the FITS-cutout URL into the JS9:

1. Menu File > open remote > URL from PanSTARRS FITS-cutout
2. Menu Scale > choose a scale
3. Menu Color > choose a colormap
4. Menu Analysis > do some blur with sigma parameter greater than 0 to minimize the noise
5. Menu View > Contours > do some choice for isophotal analysis
6. Menu Save > PNG (in local)

#astrotools