The aXe slitless extraction software Designed to extract ACS slitless data Semiautomatic reduction system (based on object catalogues) Embedded into STSDAS via PyRAF First release in 2002 aXe is successfully utilized by many groups aXe was adapted for various kinds of data: La Silla 2.2m WFI slitless data FORS MXU data NICMOS slitless data 4. May 2006 Martin Kümmel HLA coordination meeting

Examples of data reduced with aXe ACS FORS MXU NICMOS 2.2m WFI 4. May 2006 Martin Kümmel HLA coordination meeting

HLA coordination meeting The structure of aXe 2: PyRAF/IRAF interface 1D-extraction flatfielding make stamp background wavelength calibration locate object mark spectrum 1: High Level Tasks sex2gol gol2af backest af2pet petff pet2spc stamps axeprep axecore aXe_SEX2GOL aXe_GOL2AF aXe_BE aXe_AF2PET aXe_PETFF aXe_PET2SPC aXe_STAMPS 3: C-program Schematic view on part of aXe tasks: - C programs work on the pixels - PyRAF/IRAF interface to integrate them into the usual data reduction environment - High Level Task to comprise the individual tasks work on image lists. Reduce the numbe rof tasks 4. May 2006 Martin Kümmel HLA coordination meeting

HLA coordination meeting Other ingredients Calibration inputs: Auxiliary software: aXe configuration file Flatfield Sensitivity file Intrapixel correction function SExtractor for object finding MultiDrizzle for large, dithered fields 4. May 2006 Martin Kümmel HLA coordination meeting

The aXe configuration file INSTRUMENT NICMOS CAMERA NIC3 # Cycle 11 NCS calibration # September 2002 SCIENCE_EXT SCI ; Science extension DQ_EXT DQ ; DQ extension ERRORS_EXT ERR ; Error extension FFNAME nicmos_flat.fits DQMASK 16383 DQMASK 256 EXPTIME EXPTIME DRZRESOLA 0.0080 DRZSCALE 0.20 DRZLAMB0 1.0 DRZXINI 15.0 DRZROOT aXedrizzle # First order (BEAM A) BEAMA -70 45 MMAG_EXTRACT_A 21 MMAG_MARK_A 24 # Trace description, 1st order DYDX_ORDER_A 1 DYDX_A_0 0.0 DYDX_A_1 0.02118 # X and Y Offsets XOFF_A 0.0 YOFF_A -6.8 # Dispersion solution, 1st order DISP_ORDER_A 2DLDP_A_0 1.3960 DLDP_A_1 -0.008070 DLDP_A_2 0.0# Old -0.008016 My rev. -0.008070 SENSITIVITY_A NICMOS.G141.1st.sens.new.fits General information Trace information Spectral information 4. May 2006 Martin Kümmel HLA coordination meeting

Example of a spectral extraction input intermediate steps result direct image backgr. subtr. stamp image grism image local backgr. extracted spectrum 4. May 2006 Martin Kümmel HLA coordination meeting

2D spectral rebinning with aXedrizzle 10” extract stamp coadd 4. May 2006 Martin Kümmel HLA coordination meeting