EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 623 (March 2019) A&A, 623 (2019) A173 Full HTML
Free Access
%PDF-1.6 % 1 0 obj <> endobj 85 0 obj <>stream 2019-03-14T19:31:10+05:30 2019-03-14T19:31:10+05:30 2019-03-14T19:31:10+05:30 LaTeX with hyperref package application/pdf uuid:39452e02-51d7-4447-97ea-c30032f13415 uuid:44b2fc93-909e-4df2-8cb7-3174735d356f pdfTeX-1.40.19 endstream endobj 81 0 obj <>/Encoding<>>>>> endobj 2 0 obj <> endobj 5 0 obj <> endobj 80 0 obj <>stream x3T0BCSKS=3 K= \B.!X"giin "X` CP}\C#c|@04PHJ< endstream endobj 78 0 obj <> endobj 6 0 obj <>/ProcSet[/PDF]>> endobj 7 0 obj <>/Shading<<>>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/ExtGState<>/A2<>/A3<>>>/Pattern<<>>>>/Type/XObject/BBox[0 0 842.4 597.6]/PTEX.FileName(./figures/appendixE.pdf)/FormType 1>>stream x\ے}ﯨGooEj-Bfs،HCIT@UPX&}L$2Aٽ{}\]Q񓍾w&wݳArBםVJFыVIo8~qKx}d N+W5 WOݳd'Em픴FNK+h۽~[}t$NZ0t^Gk+e 4JFo5>*PBE!4}BP QۄJ#*H0mЦku&)MBkRBF o¹;2R,GcR 49,\6 m4 J\6![oVfaA47Jto5˲,} pP=,JZT%>wR>1Pa΅)lEGVJl -Vށ*lW\VyaTa[l=|ƊvV8lm k]%oFC,l QǤhlսxLIf[lM} c {G}/v,C^R7RX|B p`Sme G1D# <ҟ(L"xEM9ULVTeRԊLVT1ZQIՊ*SkQ`Wj~ YQ2,}|8p~E8R[!? mOVL᜺g)Mha\jwF6m\٬E p6*F/C3}n;hɚ|Z[+= I kVtOW'8,G̨!Gv+e  ąS1lwF\Ka͟fȉ4/ ;B&:!sq a=(wChrH`h5(YU(i"1JМa y8,Tu4ٰ+X\hB D yc(Dv!B ̌-6vF˨UB- Lř;ÞBKқ;8R13:qj}*c~MeF9u$K ӲuP-46NнdW/6\@~n1_8ZsILctpNrJc/9-9.la=D #bxg-p`U]'׻MK}CljqI[O*x+rY]_J7Or8%e\R'trC9;a;%w s @'1dH/KֶTFvcaJ0E)cL ڏ#7 ?_%L !~[-0)Z+ŨM"(!9a*t<yJE,=,θ"#Ġ00DfS8GAѤح" Kgbm-YObI8L&9n@nnsG:y"FxmƎ3mYtȠjSపf̀Yݡ01 .SV%“븈Ǧ M\=_T>cH5DE{6Fj+D,`ZiI jL9u! ""7ВRmF(@=xDDI1$"}';=ozWk_d^О;c/(cSlH!4)IMPJ49WEd&qZsVXF) jP(RUYή Ëwߖ.d*|E(WҲ"8:  T6" 8%BT ('Kً)?!,)RI!ǷAo\[,\  U>q4$q 6f 608[ oHTC 6)_ StxqmqG7$[,! t*n^̝shuL 4qNy2Ov߽//Z5x!E 4 豣TAWZ^ y.VtQ%DU NZAެCsp.2goI?C/$JBU}RZ8  S!)ږ$3acdCR"sZRd|F5]T%)xKbp<I>#q7$))eKRU NR9 %rh8RdxN@E v6 t%)xKJkbDz5$LT4s F;h_2 GWД4X7D{)Ck[%\b' xwZw x2(+蟖}eЅI[Ղ> NFhi'4&1ZN;]pz\#d1bp]-:WQw]ճzIVr`O@,cvY3đr}8&p6u4Htճj.24!G>j|hK]fP,C9=%6YAKxM[<cT88c7qug WHEϛScDʍj?񼔔58`bb\(xPjن *u9jKyI-!a9[r:e @M@|gb)BC,0,4nS.JC>z7Rc\"cM5 !J @z^vH8Z4h] W?w>7鮻cowL)]P%JGztZ|~wTA(3|~XyrDq[³~d|yQʰ-|gE-2[m`<$j>eӡ _m[?j>L#m[=j>0e̓O _m[?jnzh2).=[Ȯ>u:9ĎRT~rsS<3/mGd*F[ppʰ( Ԁ)^Ӧ?051 I´@0{Gc,-6JQlH,M-;&퀱Ci(fT"*"J U pS_7o.?toWmݏh(foePgwKίV+WgHf >źXW޼~,Pi~L/Yp}O]ܱ&pq'X@u=9gE (_S ,'r7O~Wo0^3CuQk.^TSjW%[SW(Q_ѢqqV4R/EX /URqr&I-qFǧ-R 5'mL1XJ8=JGW.5r!CC2%87)|V){M@*@\%\ׂ+{f*r(i+CSdO)AgA좢@_ho(ɭ>!BMP;9toww7cKѕԈI)TVᬎn bکmUN_LbXKyy1:cc.^AtUU鼃Td ߋ8Si:2CesV)K_r9 QB"hN"d3r]9 \?[PڽƆv e /R(?Ċ įB"^j7 G&@M{nueF :703]ͿX(VcqV7+̷wMf+c_4p˦EK Ֆ>2Y|݋!njP ,FRpfO].TcA56(Ag2q̏u" lqiwl(6rTlGa i8ø]7̶W/ʅ|ܲ 늩]ddsÆ#q1^RtxY (¦}.|KG;5DWNj8^NE\w/.ywᴿ=/awPDyQr͆N-UK%ɯJ9c%rDŽ+z٤j'#ŽRx=Ui_UT]1X);U>򽵡0qYG*J5M%*>0\={!U+WT? sUUXūCLjbU7:X;p3C9D*5kGMVGRW:o|UMP>HA[~timJYOgTzV0eVMN:-ۛ[wpئN p~}ٷu}8Qjݑ}p{~qɾzon/htL檻{wp̩yQ >\O:wi`x=_?~ڦQ!OѨǴ\R1H_ endstream endobj 79 0 obj <> endobj 12 0 obj <>/Type/Font/CharProcs 13 0 R>> endobj 8 0 obj <>/Type/Font/CharProcs 9 0 R>> endobj 11 0 obj <> endobj 10 0 obj [600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 318 401 460 838 636 950 780 275 390 390 500 838 318 361 318 337 636 636 636 636 636 636 636 636 636 636 337 337 838 838 838 531 1000 684 686 698 770 632 575 775 752 295 295 656 557 863 748 787 603 787 695 635 611 732 684 989 685 611 685 390 337 390 838 500 500 613 635 550 635 615 352 635 634 278 278 579 278 974 634 612 635 635 411 521 392 634 592 818 592 592 525 636 337 636 838 600 636 600 318 352 518 1000 500 500 500 1350 635 400 1070 600 685 600 600 318 318 518 518 590 500 1000 500 1000 521 400 1028 600 525 611 318 401 636 636 636 636 337 500 500 1000 471 617 838 361 1000 500 500 838 401 401 500 636 636 318 500 401 471 617 969 969 969 531 684 684 684 684 684 684 974 698 632 632 632 632 295 295 295 295 775 748 787 787 787 787 787 838 787 732 732 732 732 611 608 630 613 613 613 613 613 613 995 550 615 615 615 615 278 278 278 278 612 634 612 612 612 612 612 838 612 634 634 634 634 592 635 592] endobj 9 0 obj <<>> endobj 72 0 obj <> endobj 71 0 obj [600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 318 401 460 838 636 950 780 275 390 390 500 838 318 361 318 337 636 636 636 636 636 636 636 636 636 636 337 337 838 838 838 531 1000 684 686 698 770 632 575 775 752 295 295 656 557 863 748 787 603 787 695 635 611 732 684 989 685 611 685 390 337 390 838 500 500 613 635 550 635 615 352 635 634 278 278 579 278 974 634 612 635 635 411 521 392 634 592 818 592 592 525 636 337 636 838 600 636 600 318 352 518 1000 500 500 500 1342 635 400 1070 600 685 600 600 318 318 518 518 590 500 1000 500 1000 521 400 1023 600 525 611 318 401 636 636 636 636 337 500 500 1000 471 612 838 361 1000 500 500 838 401 401 500 636 636 318 500 401 471 612 969 969 969 531 684 684 684 684 684 684 974 698 632 632 632 632 295 295 295 295 775 748 787 787 787 787 787 838 787 732 732 732 732 611 605 630 613 613 613 613 613 613 982 550 615 615 615 615 278 278 278 278 612 634 612 612 612 612 612 838 612 634 634 634 634 592 635 592] endobj 13 0 obj <> endobj 69 0 obj <>stream x5 0D{8R[.{9>G-dCxI9>Q4Zo:Hsd33}d4I!rY)z>~ endstream endobj 70 0 obj <>stream x36P0P07W544U022P042QH12443s`9`a$r`Zs: P9\iM8 endstream endobj 67 0 obj <>stream x=RIr0 |wII'ԗcwi+Y~.;K"|mn%%WYJXX5UOLL$KI=~^~[dc[LذT4ݔVve,7d&uK0/Ağr, )v@xW S+;DR93KF#`m֘ UEkN+">97t0MUȰRX{h pzq+fd endstream endobj 68 0 obj <>stream x34P0P0S546T04V073PH1 X\00247CbBeX r`J# endstream endobj 66 0 obj <>stream x5Q;r1} ] 3og3JFfa =؈ėoYf~'Y)QTEX!Yjs#Sr&>'b8Ύf01h9f=!#n4U i[ZSEȺ)Z[=- c _ĜE'~3尒4#15όO}>hw/̈́LHœƘ1T$?г>0TG endstream endobj 65 0 obj <>stream x=K CBGtJ l}b"'ć$l{0rM$q ¦cɦuJ~w4ft-Ev!"ܣ<`1J0Ze=DG7(*KDw4e8$ endstream endobj 64 0 obj <>stream x357U0P F )\@>L̀,CKd!eba26"X@lM4q endstream endobj 63 0 obj <>stream xMQIn0 yO_K:LYw'&𲅺:_6J ψ6"|PmLDEh#*D ^cGܭ4oӚG csd#i]Ez )܄9z׵̞'jhN!X(ܨ2*Si=8Nh=ٱS\B^L XM,l~T7oBx?X[ endstream endobj 62 0 obj <>stream x375R0Pf& F )\@>ehifY&@) " a`9 $6f[W endstream endobj 60 0 obj <>stream x355W0PF F )\@>ehifY@Has`zrZ endstream endobj 61 0 obj <>stream x36P0C. endstream endobj 59 0 obj <>stream x50{`ɥ htMMBQ0tf}qhV^hJA endstream endobj 57 0 obj <>stream x5RK[AۿSjy쬠8K Qry:i>ޅԂ"iǚ5Q4b)>(!SHfd2r >֛L9is(Iz-v|YAғu-Mk"925Ǟ2#A, IOH3;g-yx/~2U2 `; ("$h(fƚۅ"=D^ ,z2'; Jjaq6JS]g&a氳R2 qp/${1aļ]l\̹&ӏ(H\M(?7} endstream endobj 58 0 obj <>stream x366W0P04FF @V!HD! $bY@8i -D6 G endstream endobj 56 0 obj <>stream x334T0P5f& F )\@>L̀,cSS$625pD)ON endstream endobj 55 0 obj <>stream x5 0DbX!dS낝HF<3c2a4Gȁ/i ι^$UQV" 9'R$ZUVޯN]yճMwMGbJ)uG$*`h60J};Z+w{\x6 endstream endobj 54 0 obj <>stream x- 0{OR :#&p7'=EϢ"Яs%e%r»Q A6 3ƙ+a endstream endobj 53 0 obj <>stream x334T0Pf F )\@>eh`fp)YP19eL4DjhWn endstream endobj 52 0 obj <>stream x=;0 C{Ȍd'>2VI(/u< i& b;w؞D/)ϡ+E:Ū0[M*K õ}74uK hY pu;Gw5<TQ!OJ|<(!\{0FS@\^BAjI'>stream xEQIr! ++Nͩk,3IN`k1i-x!́/|M4|72:pO.ܗ˂g–WTw/]H}w~fd{H͐:B4&!=#2V,s)R([.ꕶN;#o#JvMl:˶.:$vaqj!"uc5N"v0Q$gq&M]9yV*9>^Ƅtc׶i_>}?\" endstream endobj 50 0 obj <>stream x5QIn0 .AO ``hKxA[֌]< 'Q^{ .o8|^Z9O2 D`@ai'ώH5YN_KK(O~ J.kO8'O [WLcD.A|!]'@;綟Wuu)O645I"%Ҹ[{TS endstream endobj 49 0 obj <>stream x5O;! 9.m`ϳT/od HDG&^S=Ä=Ba$5븛ſ]3 b0řvX'qNcDlc]L(!0%)}9:Nb.a}1WOdP=&ՍI4^2`a$YNkGQ"1'2Ҝb :; *s>h][M endstream endobj 48 0 obj <>stream xEPC1 =`,{wHۿ=JFp!Z?ZK oGFA= 3A΄@xFnvpμ39Zpә\'mBITqTqLύׁlӑ!KI%&~S*)[*EH䁓M4,?Cb̠Q0qGuٜ9-L|X&Q)2>'\N}䢥Uޑ"ۡW%Qէ<Y> endstream endobj 47 0 obj <>stream xMA0~tzJ-6팀03 endstream endobj 46 0 obj <>stream xERKr0\ 3gNWp:<  2=eH6dWdՐFD)򹼖\nJ?72ͮЪG6F5+# CzVQdv!:Sp,Cu)mA#o<rLn[ :[m@ s` )(UI­\';PЪt79`Òho>F, f1H'N=q:őpI8@/ u:eMžBRq"n]ElO ?*3b Ԓ枾?9 endstream endobj 45 0 obj <>stream xEu1 CsUx:?G i@xx= r]Ņ ?޶42܍e@N"WI3Tb\/:"̒@#|:C[ۙ~:!**na.@RԏQꚡ*+kjڿ"}\Ne{g+W}: endstream endobj 44 0 obj <>stream x32P0P4& f )\@B.H  %[B4AXf&fI8"ɴ endstream endobj 43 0 obj <>stream x32P0P4& f )\V.L,іp "} endstream endobj 42 0 obj <>stream xEK D#>stream xEK CBGG|tJ￭!M@w'/mK >[ x6n5uVhR}ith6s+ fz:rGp_Gdf)|Q]dcnk]3s: endstream endobj 41 0 obj <>stream x5RKrC1ۿSpΘ}tj'+-@B./YK~%ۥW%B>R-G- Q=2'":xa>N)x_xN;2$KMH=I+4t~&+s{rj X+)$=Hr7VސWg%&&MܕBXtLX㰄*aՃM5fcdxLP} #GMv²[6!D3,($Nc$ Ұ9 9e, mh%zМaמE[{ endstream endobj 39 0 obj <>stream x=PC1= |7˥m$B6BLɔ:ʒ)O>Kbnd6%*E/% }ՖC4h9~ 3*K6p*3 mtV[ Ф`׶ r " JMrR=ot-N=Dkq: DpFjtaŲC5=kz7hGt4CָR endstream endobj 38 0 obj <>stream xMPKnD! s\I$!CU۱T*HUSbuM2yOQ nAb$<4#',;Ofč.`5[́9m:7@dP "B.ї9`Jw&\>աqZ coYaLq_֨ɲY I!}{ y+ՠ0u J*}$]S endstream endobj 36 0 obj <>stream xMQ9n1 }`=l5RDCI)S2岹$#$kʗ-\BSKEԽEuk[,],{w7?т]a;`={&lS "Q% `D Ac Sw ;fSGRt慷r!S7҄٧beJ`Dde8ah4`֑ҋ1 7W6K+n|IU\~ endstream endobj 37 0 obj <>stream x336S0P0 F )\@>,́,# .C c0mbl`fbdY 1 r endstream endobj 35 0 obj <>stream xEC1DsUA wJo-%S'"h0yM%V,&rAJ1xN1븨ufihW3=5'M<[ }@8IP1}bv">G)#qbn fW7y endstream endobj 34 0 obj <>stream x-R9$1 ~`LtIUls#h/#xE=f۴[iGiK,W ;BjW0wy.2meDkag؏]e8*Jl !2J'Qw\I2[E™w2;yNE{ kF9+%|6vzrYɩHHӺ NKؖߗ3| endstream endobj 33 0 obj <>stream xE ! CT>՞0ABA";06Ѣ76իc,zRV鐇Pi0QąYLCaΘȖ2MlTv<e~ma, U^ ?KwUBS0 endstream endobj 32 0 obj <>stream xMMB!0h\vK!CGFGx1 2&^$ m;,1',#`kܛG ADko5u~~]ԥu# ȎP p=&T)8T bSUhV=^; endstream endobj 31 0 obj <>stream x50{6X`KEoC|N/Z #pu#])Ec΂q_H1F=#O_p} endstream endobj 30 0 obj <>stream x50C{OɥJoЀw:A).nWz&LC`EՋZ-_ncb*?$ u^8{ endstream endobj 29 0 obj <>stream x5M0뙂̣KA:} ko!/uO*%:l W6xUl1ؠeηI endstream endobj 28 0 obj <>stream x=A1y?)vBX޳UO_K^1BCoj NjK)Jș`gzb8V}F%hGSiܖq5)\W4ݴk8߽U__. endstream endobj 27 0 obj <>stream x= 0 "#4M2i >d(]iBIO[_mվ*K{ j26|w wN endstream endobj 26 0 obj <>stream x5R9@ } ] v͜~߆_ CVie!U-.Im W%ڥ Pt,6˯JH+kLwIi"Eo7o}=@.^ AS(i|Ъc(ew 4<3}(~_K&(? _osџa`Ś}@*z`yT endstream endobj 25 0 obj <>stream xE 0{` 10Pl4'H8H3M ̉8lecj,mf endstream endobj 23 0 obj <>stream xMA "OPDtz_NE5jK02kP)U0\ 2IL{qIqzz"X endstream endobj 24 0 obj <>stream x363T0P0T026Q064bC.@rs`r endstream endobj 22 0 obj <>stream x36P0P040F@B!H Y@8&+ & endstream endobj 20 0 obj <>stream x366W0B]K#c R!Ő pYUp@i4ߪ endstream endobj 21 0 obj <>stream x5P C1g dVukm;aBXȔy)K>:L." u%ʚ +`p&^7`i5tႦ.B%|u{OxjrvC` jMX>stream x34P0P4W546T060Q073PH11s,lLeb ̀Ɓ% 9pr΃ endstream endobj 18 0 obj <>stream x5Qq0 54sۿ @;a@dJ\UGM>`!S֖{&UF!}W2j]* UYFp&I8d Rӿccz endstream endobj 17 0 obj <>stream xE 0D{`~&f( JpO{:2Sa ,S`5FR죰n_uzS*Ovvq= endstream endobj 16 0 obj <>stream xMQmD1 \ky R]oC /)%K [UC?13,=?TPbht/"+ߏe s`&4`oI&ռ3d‰ATwM,3V7: lx%D`r Z`Q+ tĺv7C/਺x} K{,|BL;wI#fR:=b}@e+ (\* endstream endobj 14 0 obj <>stream x=RKn1)@Mr[T /1 %?ꒈ3L~r]Qljg!.6Xr_rњbO/ȴTXVݣC(-װr{d`Jn@CHYAaPl( WԬtb ) ٠[]aP[[xfޑ3qYk?=Q2QMg|2RCgB'`$Ip#A 1qOl)V;ޒ{,\L'ib?lK\+E(~Aq|XdDw#h% 0xyDhDԎ=(ͱ&{ǫvzcw. endstream endobj 15 0 obj <>stream x-Q9AzBsˑ C :-qPO+Uwu9HTM]vf5,?c 7zqxLu5{kOfP2+qSușO \ ȹeƌ#M!RH&3AQ~#aU#j \Ks4;<9GW +ET<pC7ҹ^s0XM7/=[ endstream endobj 75 0 obj <>stream xmA E=E/IKEekLq@L4о<~QN$ KNzӐҺLղ(ǠQ-u8pctx6ޓ?Y!F?{C&\)1 /^~cZC endstream endobj 77 0 obj <>stream x3P2P5P5V2V0V҅P\\N\k endstream endobj 76 0 obj <>stream x3T2P2V5P5V0Pr:CM endstream endobj 74 0 obj <>stream x5P;! 9/i}o o f/J|4 ym, !ebqe7!{ư'Th*0F-#]x^\t%|9EieMf\[nFkBoq-./J*D,Z@}USb2;4JWe`iv_Xga~hog?O endstream endobj 73 0 obj <>stream x240S065U276r,#s# $`Ad_ endstream endobj 84 0 obj <> endobj 83 0 obj <> endobj 82 0 obj <> endobj 3 0 obj <> endobj xref 0 86 0000000004 65535 f 0000000016 00000 n 0000003645 00000 n 0000029560 00000 n 0000000000 00001 f 0000003729 00000 n 0000004078 00000 n 0000004136 00000 n 0000010629 00000 n 0000012148 00000 n 0000011097 00000 n 0000010906 00000 n 0000010136 00000 n 0000013402 00000 n 0000026362 00000 n 0000026824 00000 n 0000026045 00000 n 0000025896 00000 n 0000025506 00000 n 0000025370 00000 n 0000024969 00000 n 0000025090 00000 n 0000024851 00000 n 0000024571 00000 n 0000024730 00000 n 0000024423 00000 n 0000024015 00000 n 0000023872 00000 n 0000023664 00000 n 0000023508 00000 n 0000023351 00000 n 0000023210 00000 n 0000022969 00000 n 0000022768 00000 n 0000022366 00000 n 0000022139 00000 n 0000021695 00000 n 0000022002 00000 n 0000021389 00000 n 0000021105 00000 n 0000020487 00000 n 0000020718 00000 n 0000020162 00000 n 0000020048 00000 n 0000019911 00000 n 0000019678 00000 n 0000019270 00000 n 0000019067 00000 n 0000018752 00000 n 0000018455 00000 n 0000018155 00000 n 0000017848 00000 n 0000017474 00000 n 0000017328 00000 n 0000017171 00000 n 0000016948 00000 n 0000016815 00000 n 0000016270 00000 n 0000016678 00000 n 0000016126 00000 n 0000015912 00000 n 0000016040 00000 n 0000015766 00000 n 0000015452 00000 n 0000015309 00000 n 0000015079 00000 n 0000014777 00000 n 0000014308 00000 n 0000014637 00000 n 0000014016 00000 n 0000014173 00000 n 0000012351 00000 n 0000012168 00000 n 0000028042 00000 n 0000027701 00000 n 0000027142 00000 n 0000027549 00000 n 0000027393 00000 n 0000004018 00000 n 0000009950 00000 n 0000003874 00000 n 0000003520 00000 n 0000029483 00000 n 0000029393 00000 n 0000028201 00000 n 0000000093 00000 n trailer <<060C96FF3C25024486EE0B4E633922B1>]>> startxref 29713 %%EOF 1 0 obj <> endobj 3 0 obj <> endobj 5 0 obj <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>>/Type/Page>> endobj 86 0 obj <>stream H*2PHbw 6г07PЅ zFFf& zF@Fr.gK>W @ endstream endobj 87 0 obj <>stream 2019-03-15T10:01:41+05:30 2019-03-14T19:31:10+05:30 2019-03-15T10:01:41+05:30 LaTeX with hyperref package application/pdf uuid:39452e02-51d7-4447-97ea-c30032f13415 uuid:4021cf2a-98df-45bf-bb92-b6c940eb3eec pdfTeX-1.40.19 endstream endobj xref 1 1 0000031588 00000 n 3 1 0000031665 00000 n 5 1 0000031818 00000 n 86 2 0000032032 00000 n 0000032165 00000 n trailer <]/Prev 29713 >> startxref 35592 %%EOF

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.