# Error in single frame processing of HSC data **URL:** \ **Category:** Support\ **Tags:** butler\ **Created:** [August 22, 2023, 3:59pm UTC](https://www.rubin.community/t/error-in-single-frame-processing-of-hsc-data/7873 "2023-08-22T15:59:29Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![parejkoj](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/parejkoj/32/138_2.png) [@parejkoj](https://www.rubin.community/u/parejkoj)\ **Post date:** [August 23, 2023, 8:36pm UTC](https://www.rubin.community/t/error-in-single-frame-processing-of-hsc-data/7873/4 "2023-08-23T20:36:13Z")
The ps1 refcats at NSCA (and copied to USDF) were converted to version 1 in April 2019. I don’t know if we still have a public place to download them from (131k files, 400GB), but we probably should (for these and our htm-sharded Gaia DR2/DR3 files as well). We used to host a download link for PS1 on NCSA. To run the convert script, you’ll have to use an older science pipelines release: I don’t know how far back you need to go to get a working version of the `convert_refcat_to_nJy.py` script, but I believe it had bit-rotted before I removed that script at the end of June on DM-34793. Previous Community posts related to this: > [@PhotoCalib has replaced Calib: welcoming our nanojansky overlords](http://www.rubin.community/t/photocalib-has-replaced-calib-welcoming-our-nanojansky-overlords/3648/3): > > The converted refcats are available on lsst machines at /datasets/refcats/htm/v1/ Please update your symlink if you use one. The symlink at /datasets/hsc/repo/ref\_cats has been updated to point there. > [@Pan-STARRS reference catalog in LSST format](http://www.rubin.community/t/pan-starrs-reference-catalog-in-lsst-format/1572): > > The Pan-STARRS 3pi stack data (images and catalogs) were [released to the world](http://panstarrs.stsci.edu) as DR1 on 2016 December 19. This provides a high-quality network of calibration sources over three quarters of the sky to a modest depth. Telescopes both large and small (depths overlapping i ~ 17 to 21 mag) observing fields north of Dec=-30 deg in the optical will have good PS1 calibration sources in the field, observed through the same column as the target sources, allowing simple relative calibration for astromet… --- _[View the full topic](https://www.rubin.community/t/error-in-single-frame-processing-of-hsc-data/7873)._