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| Paper: |
QDPHOT : An IRAF Task for Quick &Dirty Photometry |
| Volume: |
216, Astronomical Data Analysis Software and Systems IX |
| Page: |
651 |
| Authors: |
Mighell, K. J. |
| Abstract: |
I presented a new fast CCD stellar photometry task for IRAF called QDPHOT (Quick & Dirty PHOTometry) which is designed to quickly produce good CCD stellar photometry for applications where speed matters and every second is important. QDPHOT currently detects and photometers stars present in two aligned CCD images with stellar full-width-at-half-maximum values of 2-3 pixels. QDPHOT typically takes just a few seconds to analyze a single CCD of two aligned WFPC2 observations in two filters [e.g. 2-3 seconds on a 200MHz Sun Ultra1 workstation]. QDPHOT is suitable for producing on-the-fly instrumental color-magnitude diagrams at the telescope console in the few seconds between CCD readouts. QDPHOT is also an excellent data mining tool for finding high-quality stellar observations amongst GB of archived data. As an example of using QDPHOT as a data mining tool, I presented many instrumental color-magnitude diagrams of globular clusters in the Milky Way and nearby galaxies which are based on archival WFPC2 observations obtained from the Hubble Space Telescope data archive. Typical reduction times for these WFPC2 observations was about 8-12 seconds per cluster CMD (all 4 WFPC2 CCDs). QDPHOT is currently packaged as part of the IRAF QDTOOLS package which is available at the following website: http://www.noao.edu/staff/mighell/qdtools/ |
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