`ApJdataFrames` Liu et al. 2010

Title: Discovery of a Highly Unequal-mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
Authors: Liu, Dupuy, Leggett

Data is from this paper:
http://iopscience.iop.org/article/10.1088/0004-637X/722/1/311/



In [1]:

    
import warnings
warnings.filterwarnings("ignore")



In [2]:

    
from astropy.io import ascii



In [3]:

    
import pandas as pd

Table 1 - Target Information for Ophiuchus Sources



In [4]:

    
#! mkdir ../data/Liu2010
#! curl http://iopscience.iop.org/0004-637X/722/1/311/suppdata/apj336343t6_ascii.txt > ../data/Liu2010/apj336343t6_ascii.txt



In [5]:

    
tbl6 = pd.read_csv("../data/Liu2010/apj336343t6_ascii.txt",
                   sep="\t", na_values=" ... ", skiprows=[0,1,2], skipfooter=1, usecols=range(9))
tbl6.head()









    Out[5]:






  
    
      
      Bandpass
      c_0
      c_1
      c_2
      c_3
      c_4
      c_5
      c_6
      rms (mag)
    
  
  
    
      0
      J_MKO
      18.904480
      -8.053993
      1.491738
      -0.136761
      0.006541
      -0.000156
      1.462266e-06
      0.14
    
    
      1
      H_MKO
      13.667090
      -5.426683
      1.027185
      -0.096185
      0.004734
      -0.000117
      1.148133e-06
      0.07
    
    
      2
      K_MKO
      5.795845
      -1.471358
      0.286801
      -0.026475
      0.001283
      -0.000032
      3.159780e-07
      0.08

We want the J-Band coefficients, in order of highest order coefficient to lowest order coefficient.



In [6]:

    
J_s = tbl6.loc[0]



In [7]:

    
coeffs = J_s[["c_"+str(i) for i in range(6, -1, -1)]].values



In [8]:

    
func = np.poly1d(coeffs)



In [9]:

    
print(func)









    



           6             5            4          3         2
1.462e-06 x - 0.0001559 x + 0.006541 x - 0.1368 x + 1.492 x - 8.054 x + 18.9

The end

	Bandpass	c_0	c_1	c_2	c_3	c_4	c_5	c_6	rms (mag)
0	J_MKO	18.904480	-8.053993	1.491738	-0.136761	0.006541	-0.000156	1.462266e-06	0.14
1	H_MKO	13.667090	-5.426683	1.027185	-0.096185	0.004734	-0.000117	1.148133e-06	0.07
2	K_MKO	5.795845	-1.471358	0.286801	-0.026475	0.001283	-0.000032	3.159780e-07	0.08

ApJdataFrames Liu et al. 2010

Table 1 - Target Information for Ophiuchus Sources

`ApJdataFrames` Liu et al. 2010