CALDB Public Release Notes Version: 2.2 CALDB Date: 2001-01-25T18:00:00 (13:00 EST) Release Date: 2001-02-15 CALDB 2.2 on the HEAD LAN is located at /data/CALDB. It is the default CALDB for CIAO 2.x on the HEAD LAN. It is also the default CALDB for standard data processing (SDP) For the General Public, all of CALDB 2.2 will be released as of 16 Feb. 2001. I. Introduction The UPGRADE to CALDB 2.2 from CALDB 2.1 includes the following files. (CALDB 2.1 was ineffectual for users, having only an addition of OBI Tolerances files, which affect data for certain CAL and Engineering observations ONLY. The 2.1 files are incidentally included with CALDB 2.2 and the upgrade tar file, but they are harmless.) A. ACIS UPDATES: 1. ACIS hypercube FEFs, both PI and PHA format, for four ACIS operating temperatures. 14 Feb. 2001. 2. ACIS gain updates for -110C and -120C (energy endpoints only). Jan 25 2001. 3. Time-dependent additional files for ACIS gain, BADPIX, and OSIP files, to accommodate the Summer 2000 Calibration observations schedule, wherein the ACIS temperature was raised to -110C for several observations on three occasions, and thenr returned to the prescribed -120C. Jan 25, 2001. B. HRC updates: 1. HRC-I degap map to be used in processing was updated as of Jan 25, 2001, to a much-improved version 2. 2. HRC-S tapringing coefficients file, which initiated the use of this algorithm in processing for HRC-S, added Jan 25, 2001. C. LETG updates: 1. Version 4 of the grating efficiency (GREFF) file was included as of Jan 25, 2001. This represents a CONSIDERABLE CHANGE to this item (higher first order, lower zeroth order, for the most part). II. Technical discussion A. ACIS tech notes: 1a. ACIS hypercube FEFs We have accomplished two essential tasks in the development of the new ACIS FEF hypercube files: 1) Reduced the number of ACIS FEF's necessary from 14,000+ to eight, namely one PHA an one PI FEF for each ACIS temperature. 2) Included in the CIAO 2.0 mkrmf software the ability to complete the interpolate an arbitrary energy scale, allowing the FEFs to include the literal ECD energy grid rather than an internally-prescribed grid. Hence the FEF data correspond more directly to calibration data. The new -90C and -100C FEF's were built from the same ECR files that are currently available on the CAL ACIS Responses page, at http://asc.harvard.edu/cal/Links/Acis/acis/Cal_prods/matrix/ matrix.html. These files were also used to build the old FEF library, being replaced. The new -110C and -120C FEFs were built with an updated set of ECD's. The updates were exclusively to add data points at 100 eV and 11,000 eV. These data are not yet posted on the responses page, but are due to be posted there soon. The files were built using a custom IDL script Mike Wise (SDS, MIT) created. It begins with a directory of individual ASCII ECD files provided by the Cal. group (Norbert Schulz, CAL group, MIT). M. Wise then create an IDL structure which contains a row for each energy of each FEF region of all CCDs. Each row contains all the necessary columns such as CCD_ID, CHIPX_MAX, etc. The only modification of data values are the conversion from Cal.-provided Gaussian sigmas to CIAO-required Gaussian FWHMs. The IDL structure is then written out as a FITS binary table with the appropriate FITS headers being added. All ECD files were provided in PHA format. The ECD files were built on a 14 to 16-point energy grid. The new FEFs preserve that grid rather than interpolating this grid out in detail over the full energy range, as did the previous FEF set. Hence there is much less derived data in the new FEFs relative to the input ECD set. Correspondingly, RMF's over arbitrary energy grids are now possible with mkrmf, and comparisons between RMFs made with new versus old FEFs will exhibit minor interpolation discrepancies, at a level of 1% or less relative to the RMF amplitude. See the data value verification section of http://icxc/calco/ECR/Approved_ECRs/ECR_2001_005.html. 1b. WHAT HAS IN FACT CHANGED: What you would have gotten up until 13:48 EST today, using acis_fef_lookup on the HEAD LAN, is as follows, using the old FEF library: Suppose you had a source centered on chipx = 815., chipy=384. Furthermore, consider an FI and a BI case for the same chipx, chipy, and at tstart's with four different FP temps on ACIS: TSTART FP_TEMP ACIS 7000000 presumably -120C 6000000 -110C 5200000 -100C 4900000 -90C Starting with CHIP 3 (an FI chip): CALDBMGR-dramen-574: acis_fef_lookup chipid=3 tstart=70000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-120/acis3d_x00_y11_FP-120_D2000-01-29 fef_piN0001.fits which contains data for chip 3, Node 3: 0051 CBD10001 CHIPX(769-1024) String 0052 CBD20001 CHIPY(353-384) String CALDBMGR-dramen-575: acis_fef_lookup chipid=3 tstart=60000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-110/acis3d_x00_y11_FP-110_D1999-09-16 fef_piN0002.fits which contains data for chip 3, Node 3: 0051 CBD10001 CHIPX(769-1024) String 0052 CBD20001 CHIPY(353-384) String CALDBMGR-dramen-578: acis_fef_lookup chipid=3 tstart=52000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-90/acis3d_x00_y00_FP-90_D1999-07-22fe f_piN0001.fits CALDBMGR-dramen-576: acis_fef_lookup chipid=3 tstart=49000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-90/acis3d_x00_y00_FP-90_D1999-07-22fe f_piN0001.fits You get the same file for chip 3 at both -90 and -100C, before CTI (sob, sob). CHIP 3 NODE 3, 0051 CBD10001 CHIPX(769-1024) String 0052 CBD20001 CHIPY(1-1024) String where the chipx range is the same (full node), and the chipy is now full-node range, too. (No parallel CTI). With the new fefs, you get: CALDBMGR-dramen-627: acis_fef_lookup chipid=3 tstart=70000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD2000-01-29fef_piN0001.fits[ccd_id=3 ,chipx=769:1024,chipy=353:384] CALDBMGR-dramen-628: acis_fef_lookup chipid=3 tstart=60000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-09-16fef_piN0001.fits[ccd_id=3 ,chipx=769:1024,chipy=353:384] CALDBMGR-dramen-629: acis_fef_lookup chipid=3 tstart=52000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-08-13fef_piN0001.fits[ccd_id=3 ,chipx=769:1024,chipy=1:1024] CALDBMGR-dramen-630: acis_fef_lookup chipid=3 tstart=49000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-07-22fef_piN0001.fits[ccd_id=3 ,chipx=769:1024,chipy=1:1024] where chipx and chipy are now explicit in the filters. Similarly using CHIP 7 (a BI CHIP): CALDBMGR-dramen-579: acis_fef_lookup chipid=7 tstart=70000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-120/acis7d_x01_y11_FP-120_D2000-01-29 fef_piN0001.fits CALDBMGR-dramen-580: acis_fef_lookup chipid=7 tstart=60000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-110/acis7d_x01_y11_FP-110_D1999-09-16 fef_piN0002.fits CALDBMGR-dramen-581: acis_fef_lookup chipid=7 tstart=52000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-100/acis7d_x01_y11_FP-100_D1999-08-13 fef_piN0001.fits CALDBMGR-dramen-583: acis_fef_lookup chipid=7 tstart=49000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/FP-90/acis7d_x01_y11_FP-90_D1999-07-22fe f_piN0001.fits In all four cases, you have chip 7, node 3, with: 0033 CBD10001 CHIPX(801-832) String 0034 CBD20001 CHIPY(353-384) String With the NEW FEF set, you get: CALDBMGR-dramen-631: acis_fef_lookup chipid=7 tstart=70000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD2000-01-29fef_piN0001.fits[ccd_id=7 ,chipx=801:832,chipy=353:384] CALDBMGR-dramen-632: acis_fef_lookup chipid=7 tstart=60000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-09-16fef_piN0001.fits[ccd_id=7 ,chipx=801:832,chipy=353:384] CALDBMGR-dramen-633: acis_fef_lookup chipid=7 tstart=52000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-08-13fef_piN0001.fits[ccd_id=7 ,chipx=801:832,chipy=353:384] CALDBMGR-dramen-634: acis_fef_lookup chipid=7 tstart=49000000 chipx=815 chipy=384 type=pi /data/CALDB/data/chandra/acis/cpf/fefs/acisD1999-07-22fef_piN0001.fits[ccd_id=7 ,chipx=801:832,chipy=353:384] with the same chipx and chipy range selection, only now explicit in the filters. 2. ACIS Gains -110C, -120C FILENAMES: acisD1999-09-16gainN0005.fits (-110C) acisD2000-01-29gainN0002.fits (-120C) The only thing changed here from previous versions, is that we added gain data points for 0.1 keV and 11.0 keV. Previously, the high and low points were 9.886 keV and 0.277 keV, respectively. This makes the processed data compatible with the new FEFs at the end points. Note that ACIS/HRMA don't give you much at 11.0, kev, and ACIS doesn't have much response at 100 eV, so no one should really notice much of a change! 3. Time-dependent gains, BADPIX, and OSIP for ACIS: Due to Summer 2000 planned temperature changes for CAL observations, the CALDB manager was asked to enhance these areas to accommodate the switching back and forth between -110C and -120C. This means I had to make copies of the -110C and -120C files, and give them new EFFECTIVE DATES, to encapsulate the changes. Here are the results: EFFECTIVE DATE FP_TEMP GAIN 2000-07-03T00:00:00 -110C acisD2000-07-03gainN0005.fits 2000-07-04T06:00:00 -120C acisD2000-07-04gainN0002.fits 2000-07-05T01:00:00 -110C acisD2000-07-05gainN0005.fits 2000-07-06T21:00:00 -120C acisD2000-07-06gainN0002.fits 2000-08-11T00:00:00 -110C acisD2000-08-11gainN0005.fits 2000-08-12T22:00:00 -120C acisD2000-08-12gainN0002.fits Note that the -110C files all have the same data and version, and the -120C files all have the same data (and version). EFFECTIVE DATE FP_TEMP BADPIX 2000-07-03T00:00:00 -110C acisD2000-07-03badpixN0002.fits 2000-07-04T06:00:00 -120C acisD2000-07-04badpixN0001.fits 2000-07-05T01:00:00 -110C acisD2000-07-05badpixN0002.fits 2000-07-06T21:00:00 -120C acisD2000-07-06badpixN0001.fits 2000-08-11T00:00:00 -110C acisD2000-08-11badpixN0002.fits 2000-08-12T22:00:00 -120C acisD2000-08-12badpixN0002.fits The gratings were only in on the 11-12 August period, so we only need two additions. EFFECTIVE DATE FP_TEMP OSIP 2000-08-11T00:00:00 -110C acisD2000-08-11osipN0004.fits 2000-08-12T22:00:00 -120C acisD2000-08-12osipN0004.fits PLEASE NOTE FOR USERS' BENEFIT: For observations taken after 12 August 2000, you will get the last files: acisD2000-08-12gainN0002.fits, acisD2000-08-12badpixN0002.fits, acisD2000-08-12osipN0004.fits now, instead of those corresponding to 2000-01-29 as you used to when we first went to -120C. However, PLEASE BE REASSURED YOU ARE GETTING THE SAME DATA for your processed files, just a different filename! B. HRC tech notes: 1. HRC-I degap upgrade to v2 makes considerable improvements in the apparent PSF of point sources. The new data are from better flat-field data analysis, which includes the tap-ringing correction algorithm we installed in the system on 31 July 2000. This will reduce the visible spread of on-axis point sources to essentially within about 1.2 arc seconds, instead of the 1.7 or higher visible with some sources, e.g. 3C273 in OBSID 461. CfA only: See my approved ECR-2001-002.html for details, at http://icxc.harvard.edu/calco/ard_updates/ECR/Approved_ECRs/ECR_2001_002.html. 2. HRC-S tap-ringing correction coefficients. The presence of this file turns on the SDP tap-ringing correction for HRC-S, for the first time in runs for record. We expect a new degap file for HRC-S as well by around March 1, 2001. C. LETG tech notes: 1. The LETG GREFF, version 4, makes considerable changes in the zeroth and first order performance prediction for LETG. See my approved ECR at http://icxc.harvard.edu/calco/ard_updates/ECR/Approved_ECRs/ECR_2001_004.html, for a better description of the details. CAVEAT: There are considerable udpated NEEDED for the HRC-S QEU and QE (quantum efficiency CALDB files) before users will be able to get the correct Grating ARFS for LETG/HRC-S. CALDB 2.3 might include these, expected around March 1, 2001. The CIAO threads page includes a new CANNED GARF for LETG/HRC-S, for on-axis sources with perfect aspect only, with standard dither included. THIS IS A TEMPORARY FIX ONLY, until we get the new HRC-S QE and QEU.