Published April 5, 2024 | Version v1
Dataset Open

Machine-learning Generated Catalog of Long Period Variables from Palomar Gattini-Infrared Lightcurves

  • 1. ROR icon Indian Institute of Technology Bombay
  • 2. ROR icon California Institute of Technology
  • 3. University of New South Wales
  • 4. ROR icon Massachusetts Institute of Technology
  • 5. ROR icon Arkansas Tech University
  • 6. ROR icon Australian National University
  • 7. ROR icon University of Chinese Academy of Sciences

Description

A catalog of LPVs obtained from a decision tree classifier trained on features extracted from Palomar Gattini-IR J band 
lightcurves as described in Suresh et. al. 2024 (https://arxiv.org/abs/2402.08000).

Description of columns

1. 'Name' - Unique identifier for each LPV; internal designation of the object
2. 'RA' - Right ascension
3. 'Dec' - Declination
4. 'num_detections' - number of detections

Calculated features:
5. 'von_neumann_score' - von-Neumann score
6. 'gp_score' - Gaussian process regression fit score
7. 'slope_min' - minimum slope of the lightcurve
8. 'slope_max' - maximum slope of the lightcurve
9. 'ptp' - peak-to-peak amplitude
10. 'nflips' - number of flips
11. 'max_rate' - maximum point-wise slope
12. 'min_rate' - minimum point-wise slope 13. 'lcdur' - observation baseline
14. 'per_diff_90_50' - difference between 90th and 50th percentiles of J band magnitude
15. 'per_diff_95_50' - difference between 95th and 50th percentiles of J band magnitude
16. 'J' - Stetson J index
17. 'K_s' - Stetson K index, calculated as single band data
18. 'K_m' - Stetson K index, calculated as multi-band data
19. 'L_s' - Stetson L index, calculated as single band data 20. 'L_m' - Stetson L index, calculated as multi-band data
21. 'phase_chisq' - chi sq of sinusiod fit to phase folded lightcurve
22. 'phase_redchi' - reduced chi sq of sinusiod fit to phase folded lightcurve
23. 'phase_aic' - akaike information criterion of sinusiod fit to phase folded lightcurve
24. 'phase_bic' - bayesian information criterion of sinusiod fit to phase folded lightcurve 25. 'bestperiod' - best fit Lomb-Scargle period
26. 'bestperiod_1' - second most likely Lomb-Scargle period
27. 'bestperiod_2' - third most likely Lomb-Scargle period
28. 'LSscore' - Lomb-Scargle score of best period
29. 'LSscore_2' - Lomb-Scargle score corresponding to second best period 30. 'LSscore_3' - Lomb-Scargle score corresponding to third best period
31. 'amplitude' - J band amplitude
32. 'meanF' - mean predicted value from Lomb-Scargle fit
33. 'chi2' - chi sq of sinusoidal fit to lightcurve
34. 'redchi2' - reduced chi square of sinusoidal fit to lightcurve
35. 'rednullchi2' - reduced chi square of linear fit to lightcurve 36. 'nullchi2' - chi square of linear fit to lightcurve
37. 'maxperiod' - maximum period from Lomb-Scargle fit
38. 'linear_slope' - slope of linear fit to lightcurve
39. 'linear_intercept' - y-intercept of linear fit to lightcurve
40. 'J_mag' - mean J band magnitude
41. 'LSratio' - ratio of Lomb-Scargle score of two most promiment peaks in
Lomb-Scargle periodogram
42. 'chi2ratio' - ratio of reduced chi square of sinusoidal fit and reduced
chi square of linear fit to lightcurve
43. 'period_ratio' - ratio of best fit Lomb-Scargle period and
maximum Lomb-Scargle period
44. 'prob_lpv_sum' - machine-learning classifier LPV score (obtained by summing probability of LPV and type II LPV)

Color information: 45. 'w1mpro' - WISE W1 mag
46. 'w1sigmpro' - WISE W1 error
47. 'w2mpro' - WISE W2 mag
48. 'w2sigmpro' - WISE W2 error
49. 'w3mpro' - WISE W3 mag
50. 'w3sigmpro' - WISE W3 error 51. 'w4mpro' - WISE W4 mag
52. 'w4sigmpro' - WISE W4 error
53. 'j_m' - 2MASS J mag
54. 'j_msigcom' - 2MASS J error
55. 'h_m' - 2MASS H mag
56. 'h_msigcom' - 2MASS H error
57. 'k_m' - 2MASS K mag 58. 'k_msigcom' - 2MASS K error
59. 'J-H' - 2MASS J-H
60. 'J-K' - 2MASS J-K 61. 'W1-W2' - WISE W1-W2
62. 'W3-W4' - WISE W3-W4
63. 'W1-W4' - WISE W1-W4

Files

lpv_cat_PGIR.csv

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