PDS_VERSION_ID = PDS3 RECORD_TYPE = "FIXED_LENGTH" DATA_SET_ID = "DI/EAR-C-LO72CCD-3-9P-IMAGES-PHOT-V1.0" PRODUCT_ID = "DI_9P_LO72_PHOTOMETRY_LOGS" PRODUCT_NAME = "LOWELL 72IN IMAGES OF 9P/TEMPEL 1, APERTURE PHOTOMETRY LOGS, 2000-09 TO 2001-01" PRODUCT_CREATION_TIME = 2004-04-12 ^ASCII_DOCUMENT = { "000928_LOG.TXT", "000929_LOG.TXT", "000930_LOG.TXT", "001001_LOG.TXT", "001017_LOG.TXT", "001018_LOG.TXT", "001119_LOG.TXT", "001120_LOG.TXT", "001216_LOG.TXT", "001218_LOG.TXT", "010114_LOG.TXT", "000928_LOG1.TXT", "000929_LOG1.TXT", "000930_LOG1.TXT", "001001_LOG1.TXT", "001017_LOG1.TXT", "001018_LOG1.TXT", "001119_LOG1.TXT", "001120_LOG1.TXT", "001216_LOG1.TXT", "001218_LOG1.TXT", "010114_LOG1.TXT", "000928_LOG2.TXT", "000929_LOG2.TXT", "000930_LOG2.TXT", "001001_LOG2.TXT", "001017_LOG2.TXT", "001018_LOG2.TXT", "001119_LOG2.TXT", "001120_LOG2.TXT", "001216_LOG2.TXT", "001218_LOG2.TXT", "010114_LOG2.TXT" } OBJECT = ASCII_DOCUMENT DOCUMENT_NAME = " Lowell 72-inch: Logs from aperture photometry extractions for Tempel 1 data from 2000-09-28 through 2001-01-14." DOCUMENT_TOPIC_TYPE = "DATA ANALYSIS" INTERCHANGE_FORMAT = "ASCII" DOCUMENT_FORMAT = "TEXT" FILES = 33 DESCRIPTION = " M. Buie provided three sets of aperture photometry extractions for each night of data. This excerpt from M. Buie describes the three sets of files: The *_LOG.TXT files are the original aperture extractions for each night and are useful only for the target positions on each frame. The apertures used here are not of any particular use. The *_LOG1.TXT files contain single aperture extractions for each night at an aperture that gives the best possible signal-to-noise ratio. This aperture is matched to the seeing for that night, regardless of the scale of the image at the comet. These results are collected into the /DATA/RESULTS directory for the period searching. The *_LOG2.TXT files are multiple aperture size extractions for each night. Karen Meech requested extractions on a set of apertures ranging from the minimum size determined by maximum SNR and less than 1% photometric error up to 5 arcsec in radius in 0.5 arcsec increments. Most of the requested range was too small to be meaningful given the seeing at the Perkins telescope. So, the range of apertures was extended to go up to 10 arcsec in 1 arcsec increments above 5 arcsec. M. Buie provided the following table of radii used during the single and multiple aperture size extractions. The 'Best Phot Aper' column gives the radius of the aperture used for the single aperture size extractions found in the daily *_LOG1.TXT files. The 'Min Phot Aper' column gives radius of the minimum aperture size for an acceptable signal-to-noise ratio. The results of these minimum aperture extractions are found in the daily *_LOG2.TXT files. The 'Other Phot Apertures' column lists the other sizes used for multiple aperture extrations. These results are also found in the daily *_LOG2.TXT files. Best Phot Aper Min Phot Aper Other Phot Apertures Date (pix) (arcsec) (pix) (arcsec) (arcsec) ---------- -------------- -------------- ------------------------ 2000-09-28 20 14.5 8.62 6.3 7 8 9 10 2000-09-29 20 14.5 9.12 6.6 7 8 9 10 2000-09-30 25 18.2 8.62 6.3 7 8 9 10 2000-10-01 20 14.5 9.62 7.0 8 9 10 2000-10-17 14 10.2 7.62 5.5 6 7 8 9 10 2000-10-18 16 11.6 5.50 4.0 4.5 5 6 7 8 9 10 2000-11-19 13 14.7 4.25 4.8 5 6 7 8 9 10 2000-11-20 14 15.9 3.25 3.7 4.0 4.5 5 6 7 8 9 10 2000-12-16 20 22.7 4.40 5.0 6 7 8 9 10 2000-12-18 20 22.7 7.12 8.1 9 10 2001-01-14 10 8.0 4.00 3.5 4.0 4.5 5 6 7 8 9 10 All three types of photometry extraction files have this record format: Column # Definition -------- --------------------------------------------------------- 1 File name of the calibrated FITS image 2 Target or object in the photometry aperture (9P=Tempel 1) 3 Filter: R or V 4 Julian date for the start of the observation 5 Exposure time in seconds 6 Gain 7 Radius of the photometry aperture in pixels 8 Inner radius of the sky annulus in pixels 9 Outer radius of the sky annulus in pixels 10 Object number for the photometry routine: 0000 = comet 11 X position (column number) of the object in pixels 12 Y position (row number) of the object in pixels 13 FWHM in pixels 14 Maximum count in the aperture 15 Total sky count 16 Sky count error 17 Magnitude 18 Magnitude error 19 Photometry quality flag: 0 = good, 1 = bad " PUBLICATION_DATE = 2004-05-21 /* Peer Review Date */ END_OBJECT = ASCII_DOCUMENT END