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Calibration Database System

NICMOS Reference File Tables

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. If you choose to access the files via this ftp server, keep in mind that there is a known bug in trying to access files via ftp server using Safari. The recommended browser is Firefox.

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 .

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