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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 ApJdataFrames Luhman1999
Title
Step1:  Table 1 - Data for Spectroscopic Sample in ρ Ophiuchi
Step2:  Save data
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Python Code:
import warnings
warnings.filterwarnings("ignore")
from astropy.io import ascii
import pandas as pd
Explanation: ApJdataFrames Luhman1999
Title: Low-Mass Star Formation and the Initial Mass Function in the ρ Ophiuchi Cloud Core
Authors: K. L. Luhman and G.H. Rieke
Data is from this paper:
http://iopscience.iop.org/0004-637X/525/1/440/fulltext/
End of explanation
names = ["BKLT","Other ID","RA_1950","DEC_1950","SpT_prev","SpT_IR","SpT_adopted",
          "Teff","AJ","Lbol","J-H","H-K","K","rK","BrGamma"]
tbl1 = pd.read_csv("http://iopscience.iop.org/0004-637X/525/1/440/fulltext/40180.tb1.txt", 
                   sep="\t", na_values="\ldots", skiprows=1, names=names)
tbl1.RA_1950 = "16 "+tbl1.RA_1950
tbl1.DEC_1950 = "-24 "+tbl1.DEC_1950
tbl1.head()
len(tbl1)
Explanation: Table 1 - Data for Spectroscopic Sample in ρ Ophiuchi
End of explanation
! mkdir ../data/Luhman1999
tbl1.to_csv("../data/Luhman1999/tbl1.csv", index=False, sep='\t')
Explanation: Save data
End of explanation
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