L5V

Hawley02 standard:           2MASS 1507-1627 - L5V
Kirkpatrick05 standard:      DENIS-P J1228.2-1547 - L5V ("optical anchor")
Kirkpatrick09(GrayCorbally): 2MASS J12281523-1547342 (=DENIS-P J1228.2-1547) - L5 (primary optical standard)

(Rc-Ic)(L5V) = 2.41  ; 2M1507 (see below)
(Rc-Ic)(L5V) = 2.395 ; N=4 L5Vs in Liebert06 (+-0.022 sem, +-0.045 rms)
=> adopt (R-I)(L5V) = 2.395 

(V-Rc)(L5V) = 3.22 ; 2M1507 (see below) 	
(V-Rc)(L5V) = 3.530 ; GJ 1001BC (see below)

(V-Ic)(L5V)    = 5.62  ; 2M1507 (see below)
(V-I_Bes)(L5V) = 6.010 ; GJ 1001BC 

(V-J)(L5V)  =  9.31 ; 2M1507 (see below)
(V-J)(L5V)  =  9.661 ; GJ 1001BC

(V-H)(L5V)  = 10.24 ; 2M1507 (see below)
(V-H)(L5V)  = 10.715 ; GJ 1001BC

(V-Ks)(L5V) = 10.82 ; 2M1507 (see below)
(V-Ks)(L5V) = 11.374 ; GJ 1001BC

<J-Ks>(L5V) = 1.74   ; Faherty09
(J-Ks)(L5V) = 1.53 (+-0.23 rms; N=7) ; Schmidt14

(i-z)(L5V)  = 2.13 (+-0.06 rms; N=5) ; Schmidt14
(i-J)(L5V)  = 4.88 (+-0.09 rms; N=5) ; Schmidt14
(i-Ks)(L5V) = 6.40 (+-0.25 rms; N=5) ; Schmidt14
(z-J)(L5V)  = 2.82 (+-0.11 rms; N=6) ; Schmidt14
(J-H)(L5V)  = 0.95 (+-0.17 rms; N=7) ; Schmidt14
(H-Ks)(L5V) = 0.60 (+-0.08 rms; N=8) ; Schmidt14

(Ks-W1)(L5V)= 0.61 (+-0.14 rms; N=7) ; Schmidt14
(Ks-W1)(L5V)= 0.685 ; Dupuy12 median N=5 d<50pc
(Ks-W1)(L5V)= 0.72  ; Dupuy12 trend
=> adopt (Ks-W1)(L5V) = 0.68 [updated 12/28/2019]

(W1-W2)(L5V)= 0.30 (+-0.12 rms; N=8) ; Schmidt14

M_G(L5V)    = 18.938 ; Reyle18 polynomial
M_J(L5V)    = 13.588 ; Reyle18 polynomial
M_H(L5V)    = 12.709 ; Reyle18 polynomial
M_Ks(L5V)   = 12.133 ; Reyle18 polynomial
(G-Rp)(L5V) =  1.822 ; Reyle18 polynomial
(G-J)(L5V)  =  5.331 ; Reyle18 polynomial
(J-Ks)(L5V) =  1.578 ; Reyle18 polynomial


Teff(L5V) = 1627 K ; Dupuy17(SaumonMarley08 scale)
Teff(L5V) = 1700 K ; 2M 1507 (see below)
Teff(L5V) = 1712 K ; Dupuy17(Lyon model scale)
Teff(L5V) = 1725 K ; GJ1001BC (Deiterich14)

BC_Ks(L5V) = 3.315 mag ; Filipazzo15 (field)
BC_Ks(L5V) = 3.331 mag ; Looper08 
BC_K(L5V)  =  3.342 mag ; Golimowksi04
BC_Ks(L5V) = 3.37  mag ; Schmidt14 (rms = 0.04)
=> adopt BC_Ks(L5V) = 3.33 mag [updated 11/1/2019]

# Examples

2MASS J15074769-1627386 = 2M_1507-1627 
	L5: Reid00,Cruz03,Reid06(opt),Reid08,Schmidt07,Faherty09(opt)
	L5.5: Knapp04(IR),Kirkpatrick05,Faherty09(IR)

	plx=144.08+-2.05(Costa06), plx=136.4+-0.4(Dahn02),
	V=22.136+-0.1:(Costa06), V=22.9+-0.5(Dahn02),
	Rc=18.928+-0.097(Costa06), Rc=18.919+-0.013(Liebert06),
	Ic=16.579+-0.079(Costa06), Ic=16.512+-0.006(Liebert06),
	J=12.830+-0.027(2M), H=11.895+-0.024(2M),
	Ks=11.312+-0.026(2M), K=11.40+-0.02(Dahn02).
	Rc-Ic=2.407(Liebert06), V-Rc=3.22+-0.11(Costa06,Liebert06),
	V-Ic=5.62+-0.11(Costa06,Liebert06), V-J=9.31+-0.11(Costa06,2M)
	V-H=10.24+-0.11(Costa06,2M) V-K=10.82+-0.11(Costa06,2M).
	Teffs: 1629K(Vrba04), 1703K(Dahn02), 1750K(Golimowski04) =>
	adopt Teff = 1700 K.  Liebert06 lists the star twice, it
	appears that the photometry was analyzed in two different
	sets, I list the values from the set with smaller
	uncertainties. logL = -4.23 (Antonova13).

GJ 1001BC =  LHS 102BC = WDS 00046-4044 BC
   L4.5+L4.5: Reid08(#2)
   L4.5: Knapp04(cited by Leggett10)
  *L5+L5: Reid08(#1)   
   L5: Kirkpatrick05, Patten06

   (J2000) 00:04:34.86-40:44:06.3 (Stauffer10). GJ 1001A is M3.5 star
   (Gliese91). Tokovinin08 lists the triple as a 0.26+0.06+0.06 Msun
   system. WDS lists separation 0.1".  Reid08 splits BC into "Ba" (B)
   having SpT=L4.5, J=13.82, J-H=0.95, J-Ks=0.65 and "Bb" (C) having
   SpT=L4.5, J=13.90, J-H=0.95, J-Ks=0.65. In another table in the
   same reference, Reid08 lists the pair as "L5 & L5". Reid06 lists
   masses of 0.070 & 0.069 Msun if 1 Gyr, and 0.078 and 0.078 Msun if
   3 Gyr. Given that Vtan ~ 100 km/s, I'll wager the system is older
   than 3 Gyr. Knapp04 lists Z-J=1.61 for unresolved BC. plx =
   76.86+-3.97 mas (Henry06), 77.02+-2.07 mas (Dieterich14).  Dupuy12
   lists photometry for B of: J=13.813+-0.034, H=12.735+-0.032,
   Ks=12.100+-0.035; and C of: J=13.913+-0.036, H=12.885+-0.034,
   Ks=12.200+-0.037. Unresolved 2MASS photometry of BC:
   J=13.109+-0.024, H=12.055+-0.026, Ks=11.396+-0.026 (AAA
   flag). Dieterich14 lists unresolved photometry of BC of:
   V=22.77+-0.025, R=19.24+-0.045, I=16.76+-0.012. Unresolved colors
   of BC: V-Ks= 22.77-11.396 = 11.374 +- 0.036, V-J = 9.661 +- 0.035,
   V-H = 10.715 +- 0.036, V-R = 3.530+-0.052, V-I = 6.01 +-
   0.028. Patten06 lists unresolved Spitzer IRAC photometry of [3.6] =
   10.36+-0.01, [4.5] = 10.47+-0.01, [5.8] = 10.14+-0.03, [8.0] =
   10.13+-0.02. Leggett10 lists unresolved MKO Ymag = 14.32+-0.10 from
   Hewett06.  logL = -4.049+-0.048 (Dieterich14), Rad = 0.105+-0.005
   (Deiterich14).  Teff = 1725+-21K (Deiterich14).