Welcome to ETC 33.1, released in December 2024.
This version includes a few small bugfixes along with data updates.
The ETC evaluation date was updated to 2026-Apr-01 (MJD 61131).
Improved error message for missing uploaded file after using the browser’s back button. (HETC-836)
ACS SBC throughputs were updated using new time dependent sensitivity measurements from March 2024. (HETC-854, HETC-863, INSACS-95)
ACS WFC throughputs were updated to project to the new evaluation MJD. (HETC-854, HETC-863, INSACS-105)
The WFC dark rate has been changed from 0.0161 to 0.0168 cts/s/pix. (HETC-854, HETC-863)
COS NUV throughputs were updated based on new time-dependent sensitivity measurements. FUV throughputs were updated to project to the new evaluation MJD. (HETC-855, HETC-864)
The COS/FUV dark rates for spectroscopic modes have changed for [FUVA, FUVB] from [3.34e-6, 4.15e-6 to [4.81e-6, 5.49e-6] cts/s/pix. (HETC-855, HETC-864)
The COS/FUV dark rates for target acquisition modes have changed for [FUVA, FUVB] from [6.34e-6, 7.00e-6] to [8.92e-6, 9.20e-6] cts/s/pix. (HETC-855, HETC-864)
The COS/NUV dark rate has been changed from 1.22e-3 to 1.18e-3 cts/s/pix. (HETC-855, HETC-864)
STIS FUV throughputs were updated based on monitoring of the time dependent sensitivity. Other throughputs were updated to project to the new evaluation MJD. (HETC-856, HETC-865)
The CCD dark rates for [low, medium, high] were updated from [0.026, 0.032, 0.038] to [0.027, 0.033, 0.039] cts/s/pix, respectively. (HETC-856, HETC-865)
The NUV dark rate was changed from 0.0013 to 0.0011 cts/s/pix. (HETC-856, HETC-865)
No change
Updated dark rates and other scalars in the User’s Guide. (HETC-871)
Fixed User’s Guide search bar functionality. (HETC-882)
Various package dependency updates. (HETC-830, HETC-835)
No change
Please see the News and Known Issues page for known issues with this release.
If you have any questions regarding this calculator, please contact the STScI HST Help Desk. Remember to include your ETC ID.
