Filters

Lazy.jl includes a comprehensive library of filter transmission curves organized by telescope and instrument. Use lazy list-filters to see all available filters.

Using Filters

In the [translate] section, reference filters by their full path or any of their nicknames:

toml

[translate]
    # These are all equivalent ways to reference HST/ACS F606W:
    f606w = {flux = 'f_f606w', error = 'e_f606w'}
    # F606W = {flux = 'f_f606w', error = 'e_f606w'}
    # hst_acs_f606w = {flux = 'f_f606w', error = 'e_f606w'}
    # hst/acs/f606w = {flux = 'f_f606w', error = 'e_f606w'}

Nickname matching is case-sensitive. Each filter has multiple nickname variants to accommodate different naming conventions.

Available Filters

JWST

NIRCam Wide

Filter	Nicknames
`jwst/nircam/f070w`	`f070w`, `F070W`, `nircam_f070w`
`jwst/nircam/f090w`	`f090w`, `F090W`, `nircam_f090w`
`jwst/nircam/f115w`	`f115w`, `F115W`, `nircam_f115w`
`jwst/nircam/f150w`	`f150w`, `F150W`, `nircam_f150w`
`jwst/nircam/f200w`	`f200w`, `F200W`, `nircam_f200w`
`jwst/nircam/f277w`	`f277w`, `F277W`, `nircam_f277w`
`jwst/nircam/f356w`	`f356w`, `F356W`, `nircam_f356w`
`jwst/nircam/f444w`	`f444w`, `F444W`, `nircam_f444w`

NIRCam Medium

Filter	Nicknames
`jwst/nircam/f140m`	`f140m`, `F140M`, `nircam_f140m`
`jwst/nircam/f162m`	`f162m`, `F162M`, `nircam_f162m`
`jwst/nircam/f182m`	`f182m`, `F182M`, `nircam_f182m`
`jwst/nircam/f210m`	`f210m`, `F210M`, `nircam_f210m`
`jwst/nircam/f250m`	`f250m`, `F250M`, `nircam_f250m`
`jwst/nircam/f300m`	`f300m`, `F300M`, `nircam_f300m`
`jwst/nircam/f335m`	`f335m`, `F335M`, `nircam_f335m`
`jwst/nircam/f360m`	`f360m`, `F360M`, `nircam_f360m`
`jwst/nircam/f410m`	`f410m`, `F410M`, `nircam_f410m`
`jwst/nircam/f430m`	`f430m`, `F430M`, `nircam_f430m`
`jwst/nircam/f460m`	`f460m`, `F460M`, `nircam_f460m`
`jwst/nircam/f480m`	`f480m`, `F480M`, `nircam_f480m`

NIRCam Narrow

Filter	Nicknames
`jwst/nircam/f164n`	`f164n`, `F164N`, `nircam_f164n`
`jwst/nircam/f187n`	`f187n`, `F187N`, `nircam_f187n`
`jwst/nircam/f212n`	`f212n`, `F212N`, `nircam_f212n`
`jwst/nircam/f323n`	`f323n`, `F323N`, `nircam_f323n`
`jwst/nircam/f405n`	`f405n`, `F405N`, `nircam_f405n`
`jwst/nircam/f466n`	`f466n`, `F466N`, `nircam_f466n`
`jwst/nircam/f470n`	`f470n`, `F470N`, `nircam_f470n`

MIRI

Filter	Nicknames
`jwst/miri/f560w`	`f560w`, `F560W`, `miri_f560w`
`jwst/miri/f770w`	`f770w`, `F770W`, `miri_f770w`
`jwst/miri/f1000w`	`f1000w`, `F1000W`, `miri_f1000w`
`jwst/miri/f1130w`	`f1130w`, `F1130W`, `miri_f1130w`
`jwst/miri/f1280w`	`f1280w`, `F1280W`, `miri_f1280w`
`jwst/miri/f1500w`	`f1500w`, `F1500W`, `miri_f1500w`
`jwst/miri/f1800w`	`f1800w`, `F1800W`, `miri_f1800w`
`jwst/miri/f2100w`	`f2100w`, `F2100W`, `miri_f2100w`
`jwst/miri/f2550w`	`f2550w`, `F2550W`, `miri_f2550w`

HST

ACS

Filter	Nicknames
`hst/acs/f435w`	`f435w`, `F435W`, `hst_f435w`, `hst_acs_f435w`
`hst/acs/f606w`	`f606w`, `F606W`, `hst_f606w`, `hst_acs_f606w`
`hst/acs/f775w`	`f775w`, `F775W`, `hst_f775w`, `hst_acs_f775w`
`hst/acs/f814w`	`f814w`, `F814W`, `hst_f814w`, `hst_acs_f814w`
`hst/acs/f850lp`	`f850lp`, `F850LP`, `f850l`, `hst_f850lp`, `hst_acs_f850lp`

WFC3

Filter	Nicknames
`hst/wfc3/f098m`	`f098m`, `F098M`, `hst_f098m`, `hst_wfc3_f098m`
`hst/wfc3/f105w`	`f105w`, `F105W`, `hst_f105w`, `hst_wfc3_f105w`
`hst/wfc3/f125w`	`f125w`, `F125W`, `hst_f125w`, `hst_wfc3_f125w`
`hst/wfc3/f140w`	`f140w`, `F140W`, `hst_f140w`, `hst_wfc3_f140w`
`hst/wfc3/f160w`	`f160w`, `F160W`, `hst_f160w`, `hst_wfc3_f160w`

Ground-Based

Subaru HSC

Filter	Nicknames
`subaru/hsc/g`	`hsc_g`, `HSC-g`, `HSC_g`
`subaru/hsc/r`	`hsc_r`, `HSC-r`, `HSC_r`
`subaru/hsc/i`	`hsc_i`, `HSC-i`, `HSC_i`
`subaru/hsc/z`	`hsc_z`, `HSC-z`, `HSC_z`
`subaru/hsc/y`	`hsc_y`, `HSC-y`, `HSC_y`

DECam

Filter	Nicknames
`DECam/decam_u`	`decam_u`, `DECam_u`
`DECam/decam_g`	`decam_g`, `DECam_g`
`DECam/decam_r`	`decam_r`, `DECam_r`
`DECam/decam_i`	`decam_i`, `DECam_i`
`DECam/decam_z`	`decam_z`, `DECam_z`
`DECam/decam_y`	`decam_y`, `DECam_y`

CFHT

Filter	Nicknames
`cfht/cfht_u`	`cfht_u`, `CFHT_u`
`cfht/cfht_wircam_j`	`cfht_j`, `CFHT_J`, `cfht_wircam_j`
`cfht/cfht_wircam_ks`	`cfht_ks`, `CFHT_Ks`, `cfht_wircam_ks`

UltraVISTA

Filter	Nicknames
`uvista/Y`	`UVISTA-Y`, `uvista_Y`, `UltraVISTA_Y`
`uvista/J`	`UVISTA-J`, `uvista_J`, `UltraVISTA_J`
`uvista/H`	`UVISTA-H`, `uvista_H`, `UltraVISTA_H`
`uvista/Ks`	`UVISTA-Ks`, `uvista_Ks`, `UltraVISTA_Ks`

Space Telescopes

Euclid

Filter	Nicknames
`euclid/VIS`	`VIS`, `vis`, `euclid_vis`
`euclid/NISP_Y`	`NISP_Y`, `nisp_y`, `euclid_NISP_Y`
`euclid/NISP_J`	`NISP_J`, `nisp_j`, `euclid_NISP_J`
`euclid/NISP_H`	`NISP_H`, `nisp_h`, `euclid_NISP_H`

Spitzer IRAC

Filter	Nicknames
`spitzer/irac/ch1`	`ch1`, `CH1`, `irac_ch1`, `IRAC_36`
`spitzer/irac/ch2`	`ch2`, `CH2`, `irac_ch2`, `IRAC_45`

Rest-Frame Filters

These are used internally for rest-frame absolute magnitude computation (see Configuration).

Filter	Nickname	Description
`restframe/tophat_uv`	`rf_uv`	1450-1550 A tophat for M_UV
`restframe/bessell_u`	`rf_u`	Bessell U for M_U
`restframe/bessell_v`	`rf_v`	Bessell V for M_V
`restframe/twomass_j`	`rf_j`	2MASS J for M_J

Adding Custom Filters

Place your filter file in src/filter_files/telescope/instrument/:

src/filter_files/my_telescope/my_filter.dat

The file should be two-column ASCII: wavelength (Angstroms) and transmission.

Add an entry to src/filter_files/filter_directory.toml:

toml

['my_telescope/my_filter']
description = 'My custom filter'
nicknames = ['my_filter', 'MY_FILTER']
wav_units = 'angstrom'

Verify with lazy list-filters.

Contributions of new filters are very welcome! If you've added filter curves for an instrument or survey not yet included, please open a pull request so others can use them too. See Development for the contributing workflow.

Filters ​

Using Filters ​

Available Filters ​

JWST ​

HST ​

Ground-Based ​

Space Telescopes ​

Rest-Frame Filters ​

Adding Custom Filters ​