Mission Overview

A PSF-Based Approach to TESS High Quality Data Of Stellar Clusters (PATHOS)

 

Primary Investigator: Domenico Nardiello

HLSP Authors: Domenico Nardiello

Released: 2019-10-09

Updated: 2020-09-08

Primary Reference(s): Nardiello et al. 2019Nardiello et al. 2020a, Nardiello et al. 2020b

DOI: 10.17909/t9-es7m-vw14

Citations: See ADS Statistics

Read Me

 
PATHOS Logo
Logo credits: Viviana Taranto (taranto.viviana8@gmail.com)

Overview

The PATHOS project provides a database of high-precision light curves for members of stellar clusters, obtained by extracting photometry from TESS Full Frame Images. Light curves are obtained with an innovative PSF-based approach, that involves the use of empirical Point Spread Functions (PSFs), a high-angular resolution input catalogue (Gaia DR2) and neighbor-subtraction. The PSF-based approach minimises the dilution effects in crowded environments, enabling extraction of high-precision photometry for stars in the faint regime (T > 13).  The PATHOS database contains all the light curves extracted during the project, as well as light curves requested for other projects. Light curves of specific targets can be requested by contacting the project managers.

Data Release 1 (2019-10-09)

The PATHOS DR1 contains light curves of 16277 stars located in the dense region centered on the globular cluster 47 Tuc and observed by TESS in Sector 1. The catalog of the stars is described in Nardiello et al. (2019).

Data Release 2 (2020-05-27)

The PATHOS DR2 contains 219256 light curves of 162901 stars located in 645 open clusters located in the southern ecliptic hemisphere and observed by TESS in Sectors 1-13. The list of stars is based on the catalog by Cantat-Gaudin et al. (2018), a list of cluster members whose membership probabilities are calculated by using Gaia DR2 proper motions and parallaxes.

Data Release 3 (2020-09-08)

The PATHOS DR3 contains 7150 light curves of 4459 stars located in 5 young associations observed by TESS in Sectors 7-13, excluding Sector 10.  A total of 9 candidate exoplanets (of which 2 are TOI's) have been detected among association members. The catalog of the analyzed stars is described in Nardiello et al. (2020b).

In addition, a catalog of exoplanet candidates is provided in Nardiello et al. (2020).  A portilon of the table is provided here for reference.  For additional columns and uncertainties, consult Table 3 in Nardiello et al. (2020).

TIC ID PATHOS ID Cluster RA (deg) Dec. (deg) Period (day) T0 (BTJD) Rp/R* Note
0394126269  Galactic Field  2.8796  -70.9869  3.8582  1339.677  0.152   
0030654608  Muzzio 1  134.3845  -47.8477  2.4955  1519.662  0.048   
0039291805  NGC 2112  88.7164  -0.0484  7.1719  1469.033  0.190   
0042524156  ASCC 88  256.8882  -35.5036  10.0130  1631.474  0.125   
0080317933  Collinder 292  237.9156  -57.2797  3.2098  1625.529  0.232   
0088977253  NGC 2548  123.0977  -5.7687  2.7677  1492.708  0.146  TOI-496
0092835691  SAI 91  129.1193  -50.1497  22.3661  1527.825  0.214   
0094589619  NGC 2437  115.7338  -14.5810  12.0829  1496.198  0.187   
0125414447  NGC 2323  105.7303  -8.4369  3.7069  1493.200  0.229   
0126600730  10  Haffner 14  116.0772  -28.3253  6.2991  1497.305  0.102   
0144995073  11  NGC 2669  131.4641  -52.9284  20.0207  1518.823  0.240   
0147069011  12  Alessi 8  232.8684  -51.1783  7.3270  1628.559  0.448   
0147426828  13  NGC 2318  104.8768  -13.2535  1.4618  1492.845  0.221   
0153734545  14  NGC 2527  121.2402  -28.1462  3.2196  1493.665  0.187   
0153735144  15  NGC 2527  121.1537  -28.2948  3.7785  1493.406  0.178   
0159059181  16  NGC 2112  88.3711  +0.4239  5.2167  1471.198  0.162   
0181602717  17  NGC 2671  131.7366  -41.9773  2.4557  1517.489  0.246   
0236084210  18  ASCC 85  251.5388  -45.3214  5.3465  1631.974  0.182   
0300362600  19  NGC 5316  208.3975  -62.0764  11.6556  1602.169  0.213   
0306385801  20  NGC 3532  166.6553  -58.8608  14.0367  1575.028  0.110   
0308538095  21  NGC 2516  120.8514  -60.6655  11.6929  1420.294  0.130   
0317536999  22  Ruprecht 94  172.5414  -63.1323  5.8557  1576.007  0.178   
0372913337  23  NGC 2516  119.4918  -60.8459  1.7860  1325.341  0.045   
0389927567  24  Melotte 101  160.2669  -65.5215  6.9408  1575.805  0.261   
0410450228  25  NGC 2516  117.8949  -60.4124  15.7784  1420.250  0.095  TOI-681
0413809436  26  NGC 5925  232.0979  -54.5586  2.7030  1627.336  0.233   
0419091401  27  Ruprecht 48  120.6352  -31.9951  12.7071  1499.685  0.188   
0432564189  28  Ruprecht 82  146.5229  -53.9787  3.7611  1546.783  0.120   
0450610413  29  Harvard 5  186.7427  -60.6906  10.6780  1600.682  0.176   
0460205581  30  IC 2602  157.0373  -64.5052  8.3252  1574.271  0.059  TOI-837
0460950389  31  IC 2602  159.1580  -64.7982  2.8622  1572.224  0.042   
0462004618  32  NGC 3114  149.9120  -59.9032  2.3669  1544.599  0.172   
0748919024  33  Ruprecht 151  115.1315  -16.3216  2.5395  1494.064  0.118   
1036769612  34  Trumpler 22  217.5064  -61.3249  7.4732  1599.298  0.111   
0081353413 35 Gamma Vel 123.0858 -47.0901 2.0865 1492.869 0.132  
0081419525 36 Gamma Vel 123.1083 -46.1092 1.5498 1518.383 0.053 TOI-580
0095003423 37 Lupus 242.5225 -31.4072 1.5268 1630.461 0.202  
0123755508 38 Gamma Vel 115.8049 -47.7691 15.2869 1492.575 0.128  
0238235254 39 Gamma Vel 119.8065 -49.9738 5.5705 1497.200 0.127  
0238379370 40 Gamma Vel 120.7447 -49.0184 27.1769 1511.748 0.079  
0307610438 41 Lupus 229.0335 -38.8753 1.5615 1601.955 0.072 TOI-831
0374732772 42 Lupus 242.1279 -38.4741 18.7944 1632.117 0.077  
0411662605 43 Lupus 244.4028 -50.3948 1.5610 1631.386 0.056  

Data Products

Each target has a FITS and TXT version of the light curves available.  The files are stored in sub-directories based on the Sector they are in as a 4-digit, zero-padded number, e.g., "s0001/" for Sector 1.  The data file naming convention is:

hlsp_pathos_tess_lightcurve_tic-<ticid>-<sector>_tess_v1_<ext>

where:

  • <ticid> = The 10-digit, zero-padded TIC ID of the target
  • <sector> = The Sector number as a 4-digit, zero-padded value, e.g., "s0001" for Sector 1
  • <ext> = The data file type extension

Data file types:

_llc.fits The light curve file in FITS format.
_llc.txt The light curve file in TEXT format.

 

The available columns include the raw fluxes from the PSF-based approach and four different aperture sizes (PSF_FLUX_RAW, AP{1,2,3,4}_FLUX_RAW) and the corrected fluxes (PSF_FLUX_COR, AP{1,2,3,4}_FLUX_COR).  The TIME column is in barycentric-corrected, truncated TESS Julian Date (BJD - 2457000.0).

Data Access

PATHOS data products are available in the MAST Portal and astroquery.mast.  For those who want to download all the light curves for a given Sector, the following Python code example below will query for all the available PATHOS observations for a given Sector (should take a few minutes) and then download the light curve FITS files.  NOTE: There are tens of thousands of light curves for a given Sector, thus downloading all of the products can take the better part of a day, even with good internet connections.  By default, the light curve files will be downloaded under a folder called "mastDownload" in the same working directory that your run the Python script from.

from astroquery.mast import Observations
sector_num = '1'
print('Querying for PATHOS Sector ' + sector_num + " Observations...")
obsTable = Observations.query_criteria(provenance_name = "PATHOS",
                                       sequence_number = sector_num)
print("Found a total of " + str(len(obsTable)) + " PATHOS targets.")
print('Downloading data products for these observations...')
for obs in obsTable:
    data_products = Observations.get_product_list(obs)
    Observations.download_products(data_products)
Link to the MAST Portal Webpage

MAST Portal

A web-based interface for cross-mission searches of data at MAST or the Virtual Observatory. Download PATHOS light curves for a few targets.
Link to MAST Astroquery

MAST Astroquery

Search for, and retrieve, PATHOS data products programmatically based on a list of coordinates or target names.

Citations

Please remember to cite the appropriate paper(s) below and the DOI if you use these data in a published work. 

Note: These HLSP data products are licensed for use under CC BY 4.0.

References