70µm Narrow Field FPS Candidate Star

Principal: Jocelyn Keene
Deputy: Jane Morrison, Bill Wheaton
Data Monkey(s): Jane Morrison and Bill Wheaton
Priority: Necessary
Downlink Priority: Normal
Analysis Time: 1 day
Last Updated:

Objective

Before carrying out the focal plane survey for 70 µm NF (campaign I), we want to check the suitability of the targets. They should not be saturated, too weak, or obviously extended. The S/N in one 3 sec integration should be good, > 30. We have 2 candidates for the 70 µm narrow field. We will execute 1 small field AOT per source, with 3 sec integrations.

Description


70 um photometry, small source, 1 cycle, 3 sec - 8 min total.
This task is performed in campaign G to check the suitablity of the star to be used to map the focal plane in campaign I. The frame table updates for all the campaigns can be found in the following table: Frame Table Updates.

Data Collected

1 70 µm photometry AOT

Data Reformatting Requirements

Array Data Desired:

70 µm

Data Reformatting Option:

Special Instructions:
Output from MIPS DATPACK - a single FITS multi-image extension file. One image extension per DCE.

Task Dependencies

Calibration Dependencies

Output and Deliverable Products

A file that contains the output of B Wheaton's centroiding program. A centroided position for each target on the array.

Data Analysis

  • JPL MIPL transfers downlink data to SSC.
  • SSC downlink ops processes through pipleine and places results in sandbox.
  • SSC MIPS IST uses FTZ to transfer data from sandbox to SSCIST21. The MIPS IT team repackages with the MIPS DATPACK. The data is calibrated with the Arizona data analysis tool (DAT).
  • Method of Calibrating data using MIPS DAT.
      1. Run mips_sloper : with following options:
        • mips_sloper filename
        • IF we do not use the default directory for the calibration files. Then use the -j option.
        • -j dirname : directory below $MIPS_DIR/Cal to find calibration files.
      2. Run mips_caler : with following options:
        • mips_caler -I illumination_correction_filename -D dark_filename-C pathname
        • -C path is the path to where the calibration files live. If you do not use the -C then the default will be used.
        • -D dark filename.
        • -I illumnation correction filename
      3. Run Xsloper_view and check to make sure data seems reasonable:
    1. The calibrated data file mipsfps_YYY107.fits (YYY a 3-digit integer string, identifying the run number) is a FITS multi-extension image file, one extension per DCE.
  • The calibrated data file is placed on sscist21: /mipsdata/fps/inpdat.
  • The MIPS IDL Centroid File Generation tool, mipspos.pro, is run according to detailed instructions in sscist21: /home/sscmip/users/waw/fps/fps.doc.
  • The output centroid values are compared with input list generated from the values defined in the AOR.

    Software Requirements

    • STINYTIM for PSF generation.
    • SSC downlink system.
    • MIPS DAT
    • IDL for IDL centroiding program- mipspos.pro for star centroiding.

    Actions Following Analysis

  • Confirm that the target is on the array and suitable for FPS test

    Failure Modes and Responses

  • Target not on array (check CS file is correct - this file define the orientation of the array).
  • Target not of suitable S/N.
  • Whatever the failure - hopefully one of the test stars will be suitable. If no stars are suitable, then we may have to find a new star.

    Additional Notes