SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions COMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H HDUNAME = 'PRIMARY ' / ASCDM block name LONGSTRN= 'OGIP 1.0' / The HEASARC Long String Convention may be used.COMMENT This FITS file may contain long string keyword values that are COMMENT continued over multiple keywords. The HEASARC convention uses the & COMMENT character at the end of each substring which is then continued COMMENT on the next keyword which has the name CONTINUE. ORIGIN = 'ASC ' / Source of FITS file CREATOR = 'mkarf v0.6.2-0' / Program creating this file MJD_OBS = 5.5249289010017E+04 / Modified Julian date of observation DS_IDENT= 'ADS/Sa.CXO#obs/10961' / dataset identifier CHECKSUM= 'bnSGckSEbkSEbkSE' / HDU checksum updated 2011-07-17T21:47:53 DATASUM = ' ' / data unit checksum updated 2011-05-03T16:30:41 DATE = '2011-07-17T21:47:53' / Date and time of file creation DATE-OBS= '2010-02-22T06:56:10' / Observation start date DATE-END= '2010-02-22T15:46:13' / Observation end date TIMESYS = 'TT ' / Time system MJDREF = 5.0814000000000E+04 / MJD zero point for times TIMEZERO= 0.0000000000000E+00 / Clock correction TIMEUNIT= 's ' / Time unit CLOCKAPP= T / default DETNAM = 'ACIS-2 ' / ACIS-I2 FILTER = ' ' GRATING = 'NONE ' CYCLE = 'P ' / events from which exps? Prim/Second/Both SIM_X = -7.8090834371673E-01 / [mm] SIM offset SIM_Y = 0.0000000000000E+00 / [mm] SIM offset SIM_Z = -2.3358743446083E+02 / [mm] SIM offset TSTART = 3.8320897046546E+08 / Observation start time TSTOP = 3.8324077314207E+08 / Observation end time MISSION = 'AXAF ' / Mission TELESCOP= 'CHANDRA ' / Telescope Used INSTRUME= 'ACIS ' / Instrument OBS_ID = '10961 ' / Observation id SEQ_NUM = '200593 ' / Sequence number END XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 12 / width of table in bytes NAXIS2 = 1070 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 3 / number of fields in each row EXTNAME = 'SPECRESP' / Imaging ARF HDUNAME = 'SPECRESP' / ASCDM block name CONTENT = 'SPECRESP' HDUVERS = '1.1.0 ' HDUCLASS= 'OGIP ' HDUCLAS1= 'RESPONSE' HDUCLAS2= 'SPECRESP' HDUVERS1= '1.0.0 ' / Obsolete Keyword HDUVERS2= '1.1.0 ' / Obsolete Keyword ARFVERSN= '1992a ' / Obsolete Keyword TTYPE1 = 'ENERG_LO' / Energy TFORM1 = '1E ' / format of field TUNIT1 = 'keV ' TLMIN1 = 0.0000000E+00 TLMAX1 = 2.0000000E+01 TTYPE2 = 'ENERG_HI' / Effective Area TFORM2 = '1E ' / format of field TUNIT2 = 'keV ' TLMIN2 = 0.0000000E+00 TLMAX2 = 2.0000000E+01 TTYPE3 = 'SPECRESP' / Effective Area TFORM3 = '1E ' / format of field TUNIT3 = 'cm**2 ' LONGSTRN= 'OGIP 1.0' / The HEASARC Long String Convention may be used.COMMENT This FITS file may contain long string keyword values that are COMMENT continued over multiple keywords. The HEASARC convention uses the & COMMENT character at the end of each substring which is then continued COMMENT on the next keyword which has the name CONTINUE. ORIGIN = 'ASC ' / Source of FITS file CREATOR = 'mkarf v0.6.2-0' / Program creating this file ASCDSVER= 'CIAO 4.3' / ASCDS version number MJD_OBS = 5.5249289010017E+04 / Modified Julian date of observation DS_IDENT= 'ADS/Sa.CXO#obs/10961' / dataset identifier REVISION= 1 / Processing version of data CHECKSUM= 'WiAWXZ9UWfAUWZ7U' / HDU checksum updated 2011-07-17T21:47:53 DATASUM = '1409212473' / data unit checksum updated 2011-07-17T21:47:53 RAND_SKY= 5.0000000000000E-01 RAND_PI = 1.0000000000000E+00 EQUINOX = 2.0000000000000E+03 / default DATE = '2011-07-17T21:47:53' / Date and time of file creation DATE-OBS= '2010-02-22T06:56:10' / Observation start date OBS_MODE= 'POINTING' / Observation mode DATE-END= '2010-02-22T15:46:13' / Observation end date TIMESYS = 'TT ' / Time system MJDREF = 5.0814000000000E+04 / MJD zero point for times TIMEZERO= 0.0000000000000E+00 / Clock correction TIMEUNIT= 's ' / Time unit BTIMNULL= 3.7791207308490E+08 / Basic Time offset (s) DATACLAS= 'OBSERVED' / default BTIMRATE= 2.5625001293973E-01 / Basic Time clock rate (s / VCDUcount) BTIMDRFT= 2.7584170773812E-18 / Basic Time clock drift (s / VCDUcount^2) FILTER = 'NONE ' / QE includes all filters RESPFILE= '0.3:11.0:0.01' / RMF File ASPFILE = '../../acisf10961/products/aux/asphist_2.fits.gz' / Aspect Histogram FBTIMCORR= 0.0000000000000E+00 / Correction applied to Basic Time rate (s) TIMEREF = 'LOCAL ' / Time reference (barycenter/local) TASSIGN = 'SATELLITE' / Time assigned by clock CLOCKAPP= T / default SIM_X = -7.8090834371673E-01 / [mm] SIM offset SIM_Y = 0.0000000000000E+00 / [mm] SIM offset SIM_Z = -2.3358743446083E+02 / [mm] SIM offset FOC_LEN = 1.0070000000000E+04 / HRMA focal length (mm) TIERRELA= 1.0000000000000E-09 / default TIERABSO= 5.0000000000000E-05 / default TIMVERSN= 'ASC-FITS-2' / Timing system definition TSTART = 3.8320897046546E+08 / Observation start time GRATING = 'NONE ' / Grating DETNAM = 'ACIS-2 ' / ACIS-I2 RA_PNT = 3.0835039347791E+02 / Pointing RA DEC_PNT = 4.1114334342979E+01 / Pointing Dec ROLL_PNT= 2.7403672443434E+01 / Pointing Roll RA_TARG = 3.0834277300000E+02 / Observer's specified target RA DEC_TARG= 4.1108644000000E+01 / Observer's specified target Dec DEFOCUS = 1.4398718632593E-03 / SIM defocus (mm) RA_NOM = 3.0835039347791E+02 / Nominal RA DEC_NOM = 4.1114334342979E+01 / Nominal Dec ROLL_NOM= 2.7403672443434E+01 / Nominal Roll TSTOP = 3.8324077314207E+08 / Observation end time STARTOBT= 0.0000000000000E+00 / On-Board MET close to STARTMJF and STARTMNF TIMEPIXR= 5.0000000000000E-01 / default TIMEDEL = 3.2410400000000E+00 / timedel Lev1 (in seconds) CTI_CORR= T CTI_APP = 'PPPPPBPBPP' MISSION = 'AXAF ' / Mission TELESCOP= 'CHANDRA ' / Telescope Used INSTRUME= 'ACIS ' / Instrument FRACEXPO= 9.3349243580760E-01 / Effective fractional exposure READMODE= 'TIMED ' / Read mode DATAMODE= 'VFAINT ' / Data mode FLSHTIME= 0.0000000000000E+00 / Inferred duration of each flush. (s) CYCLE = 'P ' / events from which exps? Prim/Second/Both TITLE = 'The Chandra Cygnus OB2 Survey' / Proposal title OBSERVER= 'Dr. Jeremy Drake' / Principal investigator OBJECT = 'Cygnus OB2' / Source name OBS_ID = '10961 ' / Observation id SEQ_NUM = '200593 ' / Sequence number ONTIME = 3.0156683381557E+04 / [s] Sum of GTIs ONTIME2 = 3.0156683381557E+04 / [s] Sum of GTIs LIVETIME= 2.9774821298405E+04 / [s] Livetime LIVTIME2= 2.9774821298405E+04 / [s] Livetime EXPOSURE= 2.9768161218107E+04 / [secs] Total exposure time EXPOSUR2= 2.9774821298405E+04 / [s] Exposure time DTCOR = 9.8733739787229E-01 / Dead time correction ASPTYPE = 'KALMAN ' FP_TEMP = 1.5328480530000E+02 / [K] Focal Plane Temperature RADESYS = 'ICRS ' / default HISTORY ----------------------------------------------------------------- HISTORY MKARF Processing History HISTORY ----------------------------------------------------------------- HISTORY Startup Directory: /xassist/data/pipeline4/chandra/10961/acisf10961/prodHISTORY ucts HISTORY Cmd Line: mkarf @@/tmp/tmpvDX5kY.par mode=hl HISTORY Parameter file used: /tmp/tmpvDX5kY.par HISTORY Detector Mask File: ../../acisf10961/data/aux/acisf10961_000N001_msk1.fiHISTORY ts.gz HISTORY Source SKY position: (3772.49,4198.1) HISTORY ---------------------------------------------------------------------- HISTORY ARDLIB History Records HISTORY ---------------------------------------------------------------------- HISTORY ARDLIB Version: 0.8.5 HISTORY File used for CALDB info: ../../acisf10961/products/events/fullrun_ccd2_HISTORY acisf10961_pi14-548_pass1_cl_src36_src.evt.gz HISTORY Parameter file: /opt/ciao-4.3/param/ardlib.par HISTORY ACIS QE File: /opt/ciao-4.3/CALDB/data/chandra/acis/qe/acisD1997-04-17qeHISTORY N0006.fits[3] HISTORY ACIS Uniformity File: /opt/ciao-4.3/CALDB/data/chandra/acis/qeu/acisD200HISTORY 0-01-29qeuN0006.fits[3] HISTORY ACIS Contamination File: /opt/ciao-4.3/CALDB/data/chandra/acis/contam/acHISTORY isD1999-08-13contamN0006.fits[3] HISTORY ACIS 2 Badpix File: /opt/ciao-4.3/CALDB/data/chandra/acis/badpix/acisD20HISTORY 00-11-28badpixN0003.fits[3] HISTORY Vignetting File: /opt/ciao-4.3/CALDB/data/chandra/default/vignet/hrmaD19HISTORY 96-12-20vignetN0003.fits[1] HISTNUM = 22 HISTORY Onaxis Area File: /opt/ciao-4.3/CALDB/data/chandra/default/axeffa/hrmaD1HISTORY 996-12-20axeffaN0008.fits[1] HISTORY ---------------------------------------------------------------------- HISTORY ---------------------------------------------------------------------- HISTORY PIXLIB History Records HISTORY ---------------------------------------------------------------------- HISTORY PIXLIB Version: 4.0.0 HISTORY ****** PIXLIB Parameter File ***** HISTORY /opt/ciao-4.3/param/geom.par: HISTORY instruments = /opt/ciao-4.3/CALDB/data/chandra/default/geom/telD1999-07HISTORY -23geomN0006.fits(CALDB) HISTORY aimpoints = /opt/ciao-4.3/CALDB/data/chandra/default/aimpts/telD1999-HISTORY 07-23aimptsN0002.fits(CALDB) HISTORY tdet = /opt/ciao-4.3/CALDB/data/chandra/default/tdet/telD1999-07HISTORY -23tdetN0001.fits(CALDB) HISTORY sky = /opt/ciao-4.3/CALDB/data/chandra/default/sky/telD1999-07-HISTORY 23skyN0002.fits(CALDB) HISTORY shell = /opt/ciao-4.3/CALDB/data/chandra/default/sgeom/telD1999-0HISTORY 7-23sgeomN0001.fits(CALDB) HISTORY obsfile = nowT00:00:00() HISTORY ****** PIXLIB System Configuration ****** HISTORY Telescope = AXAF HISTORY Focal Length (mm) = 10070.000 HISTORY Detector = ACIS HISTORY Focal Plane Sys. = FP-1.1 HISTORY Tiled Detector Plane Sys. = ACIS-2.2 HISTORY SIM Offset (mm) = (0.684 0.75 236.552) HISTORY Aim Point(NONE) (mm) = (-0.780908 0 -233.587) HISTORY Grating Arm = HEG HISTORY Grating Order = 1 HISTORY Dispersion Plane Sys. = ASC-GDP-1.1 HISTORY Rowland Circle (mm) = 8632.48 HISTORY ---------------------------------------------------------------------- HISTORY TOOL :mkarf 2011-07-17T21:47:53 ASC00001HISTORY PARM :asphistfile=../../acisf10961/products/aux/asphist_2.fitsASC00002HISTORY CONT :.gz ASC00003HISTORY PARM :outfile=../../acisf10961/products/spectra/fullrun_ccd2_aASC00004HISTORY CONT :cisf10961_pi14-548_pass1_cl_src36.arf ASC00005HISTORY PARM :sourcepixelx=3772.48659 ASC00006HISTORY PARM :sourcepixely=4198.09659 ASC00007HISTORY PARM :engrid=0.3:11.0:0.01 ASC00008HISTORY PARM :obsfile=../../acisf10961/products/events/fullrun_ccd2_acASC00009HISTORY CONT :isf10961_pi14-548_pass1_cl_src36_src.evt.gz ASC00010HISTORY PARM :pbkfile=../../acisf10961/data/aux/acisf383209252N001_pbkASC00011HISTORY CONT :0.fits.gz ASC00012HISTORY PARM :dafile=CALDB ASC00013HISTORY PARM :mirror=HRMA ASC00014HISTORY PARM :detsubsys=ACIS-I2 ASC00015HISTORY PARM :grating=NONE ASC00016HISTORY PARM :maskfile=../../acisf10961/data/aux/acisf10961_000N001_msASC00017HISTORY CONT :k1.fits.gz ASC00018HISTORY PARM :ardlibparfile=ardlib.par ASC00019HISTORY PARM :geompar=geom ASC00020HISTORY PARM :verbose=0 ASC00021HISTORY PARM :clobber=yes ASC00022END >>R<}>R> >> >>yI[>>{>]>{>33?&g>33>Q?mL>Q>p?P>p>\?^>\>Ǯ@>Ǯ>@Fv>>@:>> =@> =>(@p>(>G@B>G>ffA{>ff>A3'>>AWp>>AW>>HAյ>H?A??\A͓f?\?Ai??B !w?? =qA? =q? AAY? ?\)AA?\)?A??zA1?z? =A,? =?BpL??(B MA?(?RB ?R?!GB,U?!G?# BA5?# ?&ffBU?&ff?(Bl{?(?+B?+?.{BC?.{?0B=?0?333B0?333?5Bg?5?8QB&R?8Q?:HB%k?:H?=pBs?=p?@Bԋ?@?B\B?B\?EB?E?GC+?G?J=qCV?J=q?LCX?L?O\)CJ?O\)?QC G\?Q?TzC(b?Tz?W =C08?W =?YC8k?Y?\(C@S/?\(?^RCH`#?^R?aGCP/H?aG?c CX?c ?fffC_?fff?hCgy?h?kCn?k?n{CvN"?n{?pC}§?p?s33Cr?s33?uCR?u?xQC f?xQ?zHCˋ?zH?}pCo?}p?C??GCU?G?\C"?\? C)? ?Cs??ffCΓ?ff?C??CfH??=qC-?=q?Cܱ??Cݯ??{C ?{?\)C0?\)?CB??CV??33C?33?zC?z?Cu?? =C ? =?QCН?Q?C3??HCe?H?(C??(?pCڄG?p?RCܾA?R?CE??GCA?G?\CC?\? Cq? ?C7??ffC?ff?C??CA??=qC?=q?Cؽ??C??{Cj?{?\)C>?\)?C??C??33Cv?33?zC?z?Ch?? =C? =?QD?Q?Db??HDP?H?(D?(?pDi?p?RD?R?D??GD\?G?\D2?\? Dr? ?D??ffD2?ff?ǮC;h?Ǯ?CRD??=qC@'?=q?˅C?˅?C:??{C?{?\)CR?\)?УC?У?CgX??33C&?33?zC`?z?C.?? =C? =?QCV?Q?ٙCaG?ٙ?HC{C@>{@>RC@>R@?\)C@?\)@@Ch@@@@C@@@AGC^@AG@ACL@A@B\C=@B\@C33C|@C33@C C@C @DzCP@Dz@EC*@E@EC@E@FffC3@Fff@G =C@G =@GC@G@HQC@@C@@=qC@=q@\C1@\@HC@H@33C@33@C@@ CJ&@ @(C @(@zC-@z@C@@Cg@@pCU@p@Co@@{C@{@ffC@ff@RC@R@ =CH@@ =@\)C@\)@CV@@C@@QClj@Q@C/o@@Cu@@GC.@G@C{@@C4@@=qC@=q@\C[@\@HCD@H@33C@33@C@@ C_ @ @(C@(@zC@z@C@@CH@@pC@p@C@@{C@U@{@ffC@ff@RC@R@ =CF@ =@\)C@\)@Cx@@C=(@@QC*@Q@C@@C#@@GC@G@Cn@@C @@=qC}@=q@\C06@\@HC@H@33C@33@C& @@ C@ @(CG,@(@zC@z@C@@C"@@pC<@p@C?@@{CT@{@ffCj@ff@RCn@R@ =C@ =@\)C @\)@C-@@C@@QC`@Q@C|@@C@@GC@G@C@@C,@@=qCO@=q@\C @\@HCk@H@33Cf@33@Cy@@ Cq@ @(C{I@(@zC.@z@Cw8@@C,@@pCa @p@C@@{CML@{@ffCǥ@ff@RCBs@R@ =C@ =@\)C3@\)@Cq@@C<@@QCm@Q@CU@@CI@@GC?@G@C@@C@@=qC@=q@\C[@\@HC4@H@33C,@33@C@@ CD@ @(Cg+@(@zCë@z@C e@@C[@@pC@p@CZ@@{Cʋ@{@ffC:^@ff@RC@R@ =C @ =@\)CtS@\)@C@@C`1@@QC@Q@C$!@@C@@GC}`@G@C|@@C{`@@=qCz@=q@\Cy`F@\@HCx<@H@33Cw@33@Cu@@ CtC@ @(CsX@(@zCr'@z@Cqf@@Cpt@@pCoj&@p@Cn`@@{CmU{@{@ffClJ@ff@RCkI@R@ =CjR"@ =@\)Ci[ @\)@ChW @@CgS~@@QCfX@Q@CefN@@Cdl@@GCcT@G@Cb=T@@Ca2@@=qC`4U@=q@\C_6@\@HC^-Q@H@33C]$@33@C\!@@ C[$B@ @(CZ'w@(@zCY(@z@CX+@@CWI@@pCV @p@CU@@{CT@{@ffCS@ff@RCRo@R@ =CQnn@ =@\)CPm@\)@COj(@@CNg@@QCMns@Q@CLP@@CK"@@GCJ@G@CI@@CH@@=qCG@=q@\CF\@\@HCE@H@33CD@33@ÅCCй@Å@ CBN@ @(CA@(@zC@@z@C?v@@C>X@@pC=@p@C=@@{C;r@{@ffC:@ff@ƸRC9@ƸR@ =C9 @ =@\)C8&w@\)@ǮC7@Ǯ@C6u@@QC5 @Q@ȣC4@ȣ@C3@@GC2 o@G@əC1{@ə@C0K@@=qC/&@=q@ʏ\C.1@ʏ\@HC-42@H@33C,8@33@˅C+0@˅@ C*@ @(C)@(@zC( A@z@C'K@@C&u@@pC%%@p@C$;@@{C#,@{@ffC"@ff@θRC!@@θR@ =C @ =@\)Ce@\)@ϮC@Ϯ@Cq@@QCѧ@Q@УCY@У@C@@GC@G@љC@љ@C@@=qC@=q@ҏ\C@ҏ\@HC@H@33C@33@ӅCx@Ӆ@ Cw"@ @(CvN@(@zCm@z@C b@@C `i@@pC e@p@C k@@{C Z'@{@ffCI;@ff@ָRCA@ָR@ =CC@ =@\)CE@\)@׮C= @׮@C5q@@QC2@Q@أC8y@أ@C>@@GB\)@G@ٙB<;@ٙ@B.@@=qB8H@=q@ڏ\BE@ڏ\@HBYy@H@33Bn@33@ۅB~:@ۅ@ Bp@ @(BE@(@zBQ@z@B@@B檠@@pB2@p@Bv@@{B@{@ffB=Q@ff@޸RBj@޸R@ =B۝@ =@\)Bӷ@\)@߮B@߮@BX@@QBԈs@Q@BҤJ@@B@@GB@G@ᙚB>@ᙚ@B˅@@=qB6@=q@\B @\@HBgT@H@33Bį]@33@B@@ BF@ @(B@(@zB@z@B/@@@B~@@pBx@p@B@@{BS@{@ffB+y@ff@RB@R@ =B9(@ =@\)B@\)@BF@@B@@QB7@Q@B”@@BN@@GB%@G@陚B,@陚@B@@=qB7]@=q@\B@\@HBO@H@33Bt@33@Bc@@ B4@ @(Bo@(@zB@z@B@@BP@@pBߗ@p@Bo@@{B0 @{@ffBU@ff@RBW@R@ =BU @ =@\)B@\)@Bz@@BU@@QB@Q@B@@B@@GBp@G@B0@@BY@@=qB@=q@\B@\@HB}F@H@33Bzp@33@Bw2@@ Bu@ @(Bss@(@zBq-@z@Bn4@@Blm@@pBj%@p@BhE@@{Bfv@{@ffBdKh@ff@RBb,@R@ =B`4@ =@\)B^@\)@B\Z@@BZ)@@QBX2@Q@BV5(@@BT8@@GBR)@G@BP@@BN8C@@=qBL~@=q@\BJ@\@HBIs@H@33BG=@33@BEs@@ BCm@ @(BAЗ@(@zB@=3@z@B>@@B=@@pB;{@p@B9,@@{B8V@{@ffB6P@ff@RB5U@R@ =B3)@ =@\)B2x@\)@B0@AB/nAA(B.A(AQB,`AQAzB+\AzAB* AAB(AAB'zAAB&T%AAGB%."AGApB#ApAB"gAAB!neAAB ="AA{B A{A=qBA=qAffB6AffA\BħA\ARBARAHBAHA =BA =A33B4A33A\)BA\)AB+AABAA BA ABAA(BA(AQBAQAzBѤAzABAABvAAB @CAAB g/AAGB AGApB ApAB AABfAABBAA{B!A{A=qBFA=qAffBlAffA\BA\ARBARAHBIAHA =B$A =A33BaeA33A\)BA\)AArAAA"AA A6A AA8AA(AA(AQAMAQAzAAzAAoKAAAAAA&AA A8A A GA9A GA pAvA pA AA A AA A A3A A {A}A {A =qAvA =qA ffA3A ffA \AA \A RA㔠A RA HAAA HA =A&A =A 33AߑA 33A \)A8XA \)A AA A AۂA A A:A A AA A (AקA (A QAVA QA zAA zA AӹA A AnAA A A$A A A`A A GAΗNA GA pAF~A pA AA A AʳA A A|A A{AEA{A=qAA=qAffAAffA\AĚJA\ARA5jARAHA)AHA =AaA =A33AA33A\)AKA\)AAAAAAA AT A AA AA(AA(AQA)XAQAzAAzAAAAAAAAcAAAMA$A$@ʎA$A%@A%A%G@|PA%GA%p@A%pA%@yrA%A%@rA%A%@kA%A&{@d^A&{A&=q@_A&=qA&ff@YA&ffA&\@T5$A&\A&R@NJA&RA&H@IJA&HA' =@CWA' =A'33@=iA'33A'\)@7A'\)A'@2=;A'A'@,A'A' @'wA' A(@"ZTA(A((@1A((A(Q@A(QA(z@ZA(zA(@A(A(@ UA(A(@dA(A)?^A)A)G?A)GA)p?+%A)pA)?eA)A)?\A)A)?NA.{A.=q?9A.=qA.ff?4eVA.ffA.\?/TeA.\A.R?*eA.RA.H?%|A.HA/ =? ٹA/ =A/33?<}A/33A/\)?[A/\)A/?ۑA/A/?)A/A/ ? A/ A0?