Use llhoft as short type for LIGO aggregated h(t)

[duncanmmacleod]

This PR patches gwsumm.data.timeseries to define {H1,L1}_llhoft as the 1-second equivalent of {H1,L1}_HOFT_C00, rather than the equivalent *_DMT_C00 frames. The llhoft files are the official low-latency product that are cached for a period (~1 month) on LDAS and discoverable with gwdatafind.

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Merging #366 (8867874) into master (48150d1) will not change coverage. The diff coverage is n/a.

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[eagoetz]

@duncanmmacleod Thanks. Is this an official change? We should no longer be using *_DMT_C00 for anything? I'll note that at LLO, I can still see both types, but the L1_llhoft are 4 second frames, not 1 second frames:

[detchar@LLO-grid 13:25 ~]$ gw_data_find -o L -t L1_llhoft --latest --names-only
/archive/frames/ER8/llhoft/L1/L-L1_llhoft-11266/L-L1_llhoft-1126621180-4.gwf
[detchar@LLO-grid 13:25 ~]$ gw_data_find -o L -t L1_DMT_C00 --latest --names-only
/gds-l1/dmt/frames/hoft/L1/L-L1_DMT_C00-136777/L-L1_DMT_C00-1367777884-1.gwf

[eagoetz]

Ping @duncanmmacleod about my question https://github.com/gwpy/gwsumm/pull/366#issuecomment-1542631174

[eagoetz]

Ping @duncanmmacleod about my question https://github.com/gwpy/gwsumm/pull/366#issuecomment-1542631174

[eagoetz]

Ping @duncanmmacleod, could you check my comment and give feedback? Thank you!

[duncanmmacleod]

Is this an official change?

This is my reccomendation. The X1_llhoft dataset is the primary low-latency product, so should be preferred over the X1_DMT_C00 'backup' data product.

That's about as official as I am willing to get.