Data Use Policy

All the images from the survey and the continuum-subtracted images will be made public eventually through this page. For now, all the CASU pipeline products are available together with most of the continuum-subtracted images.

Please cite the UWIFE survey paper (Lee et al. 2014, MNRAS, submitted) if you are using any of the data in a publication.

# UWIFE Preliminary Data Access

The observed [Fe II] images (products of CASU pipeline) are available from the following location. Also available are continuum subtracted (H-band subtracted) images.

You should connect via "sftp".

- ip : 103.8.230.113
- port : 7774
- login name : gems0_public

The password is gems0. For easy access to the server, send me (lee.j.joon@gmail.com) your public ssh key.

## Pipeline images

The pipeline processed [Fe II] images are located under "data/uwife/casu_pipeline" directory, whose listing may look like below.

    README                             uwife_20120623_20120708
    reduced                            uwife_20120623_20120708_old
    status                             uwife_20120623_20120708v2
    uwife_20120620_20120622            uwife_20120709_20120713
    uwife_20120620_20120622_old        uwife_20120724_20120730
    uwife_20120620_20120622v2          uwife_20120814_20120824
    uwife_20120620_20120622_w44_short  uwife_20120913_20120916

The files are further divided into subdirectories according to their observed dates. For example, uwife_20120913_20120916 contains

    w20120913_00153_sf_st_cat.fits  w20120914_01474_sf_st.fit
    w20120913_00153_sf_st_conf.fit  w20120914_01486_sf_st_cat.fits
    w20120913_00153_sf_st.fit       w20120914_01486_sf_st_conf.fit
    w20120913_00165_sf_st_cat.fits  w20120914_01486_sf_st.fit
    ...
    w20120914_01462_sf_st.fit       w20120916_00239_sf_st_conf.fit
    w20120914_01474_sf_st_cat.fits  w20120916_00239_sf_st.fit
    w20120914_01474_sf_st_conf.fit

The file name represent the date of observation and the run id. Files ending "_sf_st.fit" are images. These FITS image files have 4 extensions corresponding to 4 chips (w, x, y and z). Note that the images are rice-compressed. You may find this page helpful. Files ending with "_sf_st_cat.fits" are catalog of detected sources, and the files with "_sf_st_conf.fit" are confidence maps.

For each tile (a single square in the coverage maps), which is about $50'\times50'$, there are 4 fits files where each file contains 4 images, i.e., total of 16 images for a single tile. For example, 4 files associated with tile number 129 are

    w20120626_00631_sf_st.fit
    w20120626_00643_sf_st.fit
    w20120626_00655_sf_st.fit
    w20120626_00667_sf_st.fit

The mapping information between tile number and the associated files can be found from the info files, which can be downloaded from the link below.

- info file (this link may not work)
- info file (alternative link)

You will see files named like uwife0033_FeII_l15_50:129.info which contains lines similar to below.

    [FeII]
    0_0 : w20120626_00631_sf_st.fit
    1_0 : w20120626_00643_sf_st.fit
    0_1 : w20120626_00655_sf_st.fit
    1_1 : w20120626_00667_sf_st.fit
    ....
    w20120626_00631_sf_st.fit : sftp://gems0_public@103.8.230.221:wfcam/uwife_20120623_20120708/w20120626_00631_sf_st.fit
    ....

It lists associated file names for each filter, and the urls to download those files. 0_0, 0_1, 1_0 and 1_1 are sequence name, i.e., a single tile is consist of 4 sequences.

## Continuum subtracted images

Continuum-subtracted images are available under data/uwife/compressed directory of the above server. Both [Fe II] and H2 images are available (but some are missing due to various reasons). As of early 2014, the number of continuum-subtracted [Fe II] images is currently 3432, which corresponds to about ~210 tiles (for some tiles, not all 16 images are availble). The number is slightly less for H2. Files are named like below.

    uwife000_FeII_S0_0v0_w_starsub.fits.fz
    uwife000_FeII_S0_0v0_x_starsub.fits.fz
    uwife000_FeII_S0_0v0_y_starsub.fits.fz
    ....
    uwife061_FeII_S1_1v0_y_starsub.fits.fz
    uwife061_FeII_S1_1v0_z_starsub.fits.fz
    uwife061_H2_S0_0v0_w_starsub.fits.fz
    uwife061_H2_S0_0v0_x_starsub.fits.fz
    ....

The three digit number at the beginning is the tile number, followed by the filter nane, sequence number and chip id.

For example, uwife061_FeII_S1_1v0_z_starsub.fits.fz represents

- tile number : 61
- sequence : 1_1
- chip id : z

Note that there are 4 chips (corresponds to 4 images in the pipeline fits file), which are labeled as w, x, y and z.

## Find image you want

Under data/uwife/info, you will also find two files.

- uwife_msb_id_target_name.txt
- wfcam_fov.txt

"uwife_msb_id_target_name.txt" contains nominal position of each tile.

"Wfcam_fov" contains fov of each array (for each sequence) relative to the nominal position in "uwife_msb_id_target_name.txt". The coordinate need to be calculated in Ra.Dec.

Thus, using these files you can figure out which tile contains your target.

data/uwife/info/find_msb.tgz contains a python script that does that for you (the search algorithm is quite naive thus slow).

If you untar /cluster_results/find_msb.tgz, you will see following files.

To search a point, provide ra & dec.

    > ./find_uwife.py 272.8625 -19.416
    7 1_0 y

The output is tile numner, sequence, and chip id, i.e., for above position you need to take a look at uwife007_FeII_S1_0v0_y_starsub.fits.fz for the continuum-subtracted FeII image. For a pipeline-processed image, you can find an appropriate file from the info files. Take a look at uwife0007_FeII_lm2_15:77.info.

    [FeII]
    0_0 : w20120620_00780_sf_st.fit
    1_0 : w20120620_00792_sf_st.fit
    0_1 : w20120620_00804_sf_st.fit
    1_1 : w20120620_00816_sf_st.fit
    ...

And w20120620_00792_sf_st.fit is the right file. Since, your source is in chip y, you have to look at 3rd extension.

- All units must be in degree.
- it may return multiple images.
- it may return images yet to be observed, i.e., you need to check the existence of such images by yourself.

Similarly, to seach for images that overlaps with a given rectangle, provide ra & dec of center together with width and height (all in degrees).

    > ./find_uwife.py 272.8625 -19.416 0.05 0.05
    7 1_0 y
    7 1_1 z