Reference files used by the NICMOS calibration pipeline (CALNICA) are updated on a regular basis. Current reference files files can be retrieved from the HST archive, or downloaded directly from the nref directory. Note that FTP access is browser dependent: Safari does not work; Firefox or Chrome may or may not work depending on the Operating System. If you cannot download the files via Firefox or Chrome, you can try using a standalone FTP tool or accessing the ftp site directly (ftp ftp.stsci.edu) with 'anonymous' (without quotes) as your username and your email address as your password.
If you would like to receive an e-mail every time a new NICMOS reference file is delivered and the database is updated,
you can subscribe to the nic_reffiles_upd mailing list. To subscribe to this list, send an e-mail to
MajorDomo @ stsci.edu with the following in the body of the message:
subscribe nic_reffiles_upd your_address .
New tools for exploring NICMOS Reference Files are now available at https:/hst-crds.stsci.edu. To get a listing of the reference files you're interested in, click on 'nicmos' then select the filetype. Use the names below in the Header Keyword column as a guide.
| Reference File Type | Extension | Header Keyword | Camera |
|---|---|---|---|
|
Bad Pixel Masks Masks for grot and bad pixels. More... |
msk | MASKFILE | All |
|
Read Noise Files Readout noise for each pixel as the 1 standard deviation noise level in electrons. More... |
noi | NOISFILE | All |
|
Dark Files Signal detected in the absence of photons from the sky. More... |
drk | DARKFILE | All |
|
Temperature Dependent Darks Temperature dependent signal detected in the absence of photons from the sky. More... |
tdd | TEMPFILE | All |
|
Linearity Correction Files Corrects for the non-linear response of the detectors and contains the saturation for each pixel. More... |
lin | NLINFILE | All |
|
Flat Field Files Static flatfield reference files. More... |
flt | FLATFILE | All |
|
Temperature Dependent Flat Fields Temperature dependent flatfields. More... |
tdf | TDFFILE | All |
|
Background Illumination Pattern Files Dummy files, needed for CALNICB. More... |
ilm | ILLMFILE | All |
|
Photometric Calibration Tables Contain the photometry parameters for all observation modes. More... |
pht | PHOTTAB | All |
|
Geometric Distortion Coefficients Table Used in correcting geometric distortion of image mode data. More... |
idc | IDCTAB | All |
|
Persistence Model Files Ring median of the BEP (Bright earth persistence) image. More... |
pmd | PMODFILE | NIC2 |
|
Persistence Mask Files Combination of the bad pixel list with the 35x35 in the corners. More... |
pmk | PMSKFILE | NIC2 |
|
Nonlincor Zeropoint Scaling Table Ratio, for each filter, in zero point count rate before and after applying rnlincor. More... |
zpr | ZPRATAB | All |
|
Nonlinearity Power Law Tables The power law slope of count rate non-linearity at a number of wavelengths. More... |
nlc | RNLCORTB | All |
|
Special Darks for SAACLEAN Darks used by saaclean. More... |
sdk | SAADFILE | All |
|
SAA Darks Special darks taken after SAA passage. More... |
--- | --- | N/A |
|
ST-ECF Grism Calibration Files Inverse sensitivity and wavelength calibration data for grisms. More... |
--- | --- | NIC3 |