123anonymous123/StarEmbed

Light Curve Train/Val/Test Dataset (EW, EA,RRab,RRc,RS CVn,LPV) and Embedding Data README

This README explains the the CSDR1 light-curve dataset, the embeddings dataset in HF format and the information about each columnn.

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1. Raw light curve

The 40k expert-labeled ZTF multi-band light curves dataset is at StarEmbed/data.

The OOD source light curve is located at StarEmbed/csdr1_minority_ztf_raw_light_curve.

The macho light curve for Astromer-1 analysis is located at StarEmbed/macho_raw_light_curve.

2. Data path mapping

Please use the embeddings located below StarEmbed/embeddings_with_anom. The name of the embeddings in the python and bash script should be the same as shown under StarEmbed/embeddings_with_anom.

Some exception below:

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Hugging Face folder	Corresponding disk path (basename only)
embs_random_trn_val_tst_bandgr	random

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3. Available columns

Each embeddings in StarEmbed/embeddings_with_anom has the following fields:

Column	Type	Description
sourceid	string	ps1_pbjid, object ID cross matched to another ZTF-like observatory (PS1 = Pan-STARRS1)
start (not useful)	pandas.Timestamp	date of first observation
freq (not useful)	string	sampling frequency (e.g. "1D" for daily)
target (Raw Light curve)	list of floats	magnitude, measure of brightness (AB system)
past_feat_dynamic_real	list of lists	mag_err, 1 sigma uncertainty on magnitude
feat_dynamic_real	list of lists	delta_t (the time gap between each two consecutive time steps)
length	int64	length of the light curve
period	float	catalog period of the variable star
ps1_objid	string	Pan-STARRS1 object identifier
mjd	list of floats	time step in Modified Julian Date, aligned with target
class_str	str	class label (one of 1,2,4,5,6,8,13)
csdr1_id	string	Catalina CSS identifier
embeddings_g		embedding of each time step of g band
embeddings_r		embedding of each time step of r band

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Citation

Our dataset is curated from ZTF survey and The Catalina Surveys Periodic Variable Star Catalog, which we cite their works below.

@article{bellm2018zwicky,
  title={The Zwicky Transient Facility: system overview, performance, and first results},
  author={Bellm, Eric C and Kulkarni, Shrinivas R and Graham, Matthew J and Dekany, Richard and Smith, Roger M and Riddle, Reed and Masci, Frank J and Helou, George and Prince, Thomas A and Adams, Scott M and others},
  journal={Publications of the Astronomical Society of the Pacific},
  volume={131},
  number={995},
  pages={018002},
  year={2018},
  publisher={IOP Publishing}
}

@article{drake2014catalina,
  title={The catalina surveys periodic variable star catalog},
  author={Drake, AJ and Graham, MJ and Djorgovski, SG and Catelan, M and Mahabal, AA and Torrealba, G and Garc{\'\i}a-{\'A}lvarez, D and Donalek, C and Prieto, JL and Williams, R and others},
  journal={The Astrophysical Journal Supplement Series},
  volume={213},
  number={1},
  pages={9},
  year={2014},
  publisher={IOP Publishing}
}025}
}