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 CHECKSUM= 'Mp5aOn2TMn2YMn2Y' / HDU checksum updated 2013-05-20T01:26:58 DATASUM = ' ' / data unit checksum updated 2013-05-20T01:26:51 DATE = '2013-05-20T01:26:58' / Date and time of file creation MJD_OBS = 5.6332578988869E+04 / Modified Julian date of observation DS_IDENT= 'ADS/Sa.CXO#obs/13465' / dataset identifier DATE-OBS= '2013-02-09T13:53:44' / Observation start date DATE-END= '2013-02-09T17:50:02' / Observation end date TIMESYS = 'TT ' / Time system MJDREF = 5.0814000000000E+04 / [d] MJD zero point for times TIMEZERO= 0.0000000000000E+00 / [s] Clock correction TIMEUNIT= 's ' / Time unit CLOCKAPP= T / default DETNAM = 'ACIS-3 ' / ACIS-I3 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 = -2.2584334333202E+02 / [mm] SIM offset TSTART = 4.7680522463826E+08 / [s] Observation start time (MET) TSTOP = 4.7681940243902E+08 / [s] Observation end time (MET) MISSION = 'AXAF ' / Mission TELESCOP= 'CHANDRA ' / Telescope Used INSTRUME= 'ACIS ' / Instrument OBS_ID = '13465 ' / Observation id OBI_NUM = 0 / Obi number SEQ_NUM = '801106 ' / 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 REVISION= 1 / Processing version of data CHECKSUM= 'QeYoTbXlQbXlQbXl' / HDU checksum updated 2013-05-20T01:26:58 DATASUM = '2118676764' / data unit checksum updated 2013-05-20T01:26:58 RAND_SKY= 0.0000000000000E+00 RAND_PI = 0.0000000000000E+00 DATE = '2013-05-20T01:26:58' / Date and time of file creation MJD_OBS = 5.6332578988869E+04 / Modified Julian date of observation DS_IDENT= 'ADS/Sa.CXO#obs/13465' / dataset identifier DATE-OBS= '2013-02-09T13:53:44' / Observation start date DATE-END= '2013-02-09T17:50:02' / Observation end date TIMESYS = 'TT ' / Time system MJDREF = 5.0814000000000E+04 / [d] MJD zero point for times TIMEZERO= 0.0000000000000E+00 / [s] Clock correction TIMEUNIT= 's ' / Time unit BTIMNULL= 4.7195790917715E+08 / Basic Time offset (s) BTIMRATE= 2.5625001375548E-01 / Basic Time clock rate (s / VCDUcount) BTIMDRFT= 5.0799432479415E-18 / Basic Time clock drift (s / VCDUcount^2) BTIMCORR= 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 TIERRELA= 1.0000000000000E-09 / default TIERABSO= 5.0000000000000E-05 / default TIMVERSN= 'ASC-FITS-2' / Timing system definition TSTART = 4.7680522463826E+08 / [s] Observation start time (MET) TSTOP = 4.7681940243902E+08 / [s] Observation end time (MET) OBS_MODE= 'POINTING' / Observation mode STARTMJF= 16703 / Major frame ctr value at start of data STARTMNF= 20 / Start minor frame ctr at start of data STARTOBT= 0.0000000000000E+00 / On-Board MET close to STARTMJF and STARTMNF STOPMJF = 17137 / Major frame ctr value at stop of data FILTER = 'NONE ' / QE includes all filters RESPFILE= '0.3:11.0:0.01' / RMF File ASPFILE = '../../acisf13465/products/aux/asphist_3.fits.gz' / Aspect Histogram FSTOPMNF = 29 / Stop minor frame ctr at end of data TIMEPIXR= 5.0000000000000E-01 / default DATACLAS= 'OBSERVED' / default RADESYS = 'ICRS ' / default TIMEDEL = 3.1410400000000E+00 / [s] timedel Lev1 MISSION = 'AXAF ' / Mission TELESCOP= 'CHANDRA ' / Telescope Used SIM_X = -7.8090834371673E-01 / [mm] SIM offset SIM_Y = 0.0000000000000E+00 / [mm] SIM offset SIM_Z = -2.2584334333202E+02 / [mm] SIM offset FOC_LEN = 1.0070000000000E+04 / [mm] HRMA focal length INSTRUME= 'ACIS ' / Instrument GRATING = 'NONE ' / Grating DETNAM = 'ACIS-3 ' / ACIS-I3 RA_PNT = 5.7094563079707E+01 / [deg] Pointing RA DEC_PNT = -4.5302269982205E+01 / [deg] Pointing Dec ROLL_PNT= 2.8327392966940E+02 / [deg] Pointing Roll RA_TARG = 5.7073750000000E+01 / [deg] Observer's specified target RA DEC_TARG= -4.5249806000000E+01 / [deg] Observer's specified target Dec DEFOCUS = 1.4398718632593E-03 / [mm] SIM defocus RA_NOM = 5.7094563079707E+01 / [deg] Nominal RA DEC_NOM = -4.5302269982205E+01 / [deg] Nominal Dec ROLL_NOM= 2.8327392966940E+02 / [deg] Nominal Roll READMODE= 'TIMED ' / Read mode CTI_CORR= T CTI_APP = 'PPPPPBPBPP' FRACEXPO= 9.7779560656833E-01 / Effective fractional exposure DATAMODE= 'VFAINT ' / Data mode FLSHTIME= 0.0000000000000E+00 / [s] CYCLE = 'P ' / events from which exps? Prim/Second/Both TITLE = 'Cosmology and Cluster Evolution from the 80 Most Massive Clusters i&'CONTINUE 'n 2000 deg^2 from the South Pole Telescope Survey' / Proposal title OBSERVER= 'Dr. Bradford Benson' / Principal investigator OBJECT = 'SPT-CLJ0348-4514' / Source name OBS_ID = '13465 ' / Observation id OBI_NUM = 0 / Obi number SEQ_NUM = '801106 ' / Sequence number ONTIME = 1.2957988367200E+04 / [s] Sum of GTIs ONTIME3 = 1.2957988367200E+04 / [s] Sum of GTIs LIVETIME= 1.2788682709650E+04 / [s] Livetime LIVTIME3= 1.2788682709650E+04 / [s] Livetime EXPOSURE= 1.2788663894206E+04 / [secs] Total exposure time EXPOSUR3= 1.2788682709650E+04 / [s] Exposure time DTCOR = 9.8693426381071E-01 / Dead time correction ASPTYPE = 'KALMAN ' FP_TEMP = 1.5328480530000E+02 / [K] Focal Plane Temperature HISTORY ----------------------------------------------------------------- HISTORY MKARF Processing History HISTORY ----------------------------------------------------------------- HISTORY Startup Directory: /xassist/data/pipeline4/chandra/13465/acisf13465/prodHISTORY ucts HISTORY Cmd Line: mkarf @@/tmp/tmptv48DS.par mode=hl HISTORY Parameter file used: /tmp/tmptv48DS.par HISTORY Detector Mask File: ../../acisf13465/data/aux/acisf13465_000N001_msk1.fiHISTORY ts.gz HISTORY Source SKY position: (4108.62,5105.67) HISTORY ---------------------------------------------------------------------- HISTORY ARDLIB History Records HISTORY ---------------------------------------------------------------------- HISTORY ARDLIB Version: 0.8.5 HISTORY File used for CALDB info: ../../acisf13465/products/events/fullrun_ccd3_HISTORY acisf13465_pi14-548_pass1_cl_src3_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[4] HISTORY ACIS Uniformity File: /opt/ciao-4.3/CALDB/data/chandra/acis/qeu/acisD200HISTORY 0-01-29qeuN0006.fits[4] HISTORY ACIS Contamination File: /opt/ciao-4.3/CALDB/data/chandra/acis/contam/acHISTORY isD1999-08-13contamN0006.fits[4] HISTORY ACIS 3 Badpix File: /opt/ciao-4.3/CALDB/data/chandra/acis/badpix/acisD20HISTORY 00-11-28badpixN0003.fits[4] 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 -225.843) 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 2013-05-20T01:26:58 ASC00001HISTORY PARM :asphistfile=../../acisf13465/products/aux/asphist_3.fitsASC00002HISTORY CONT :.gz ASC00003HISTORY PARM :outfile=../../acisf13465/products/spectra/fullrun_ccd3_aASC00004HISTORY CONT :cisf13465_pi14-548_pass1_cl_src3.arf ASC00005HISTORY PARM :sourcepixelx=4108.6225796 ASC00006HISTORY PARM :sourcepixely=5105.6650157 ASC00007HISTORY PARM :engrid=0.3:11.0:0.01 ASC00008HISTORY PARM :obsfile=../../acisf13465/products/events/fullrun_ccd3_acASC00009HISTORY CONT :isf13465_pi14-548_pass1_cl_src3_src.evt.gz ASC00010HISTORY PARM :pbkfile=../../acisf13465/data/aux/acisf476806194N001_pbkASC00011HISTORY CONT :0.fits.gz ASC00012HISTORY PARM :dafile=CALDB ASC00013HISTORY PARM :mirror=HRMA ASC00014HISTORY PARM :detsubsys=ACIS-I3 ASC00015HISTORY PARM :grating=NONE ASC00016HISTORY PARM :maskfile=../../acisf13465/data/aux/acisf13465_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> ;> ><1>>{=AS>{>33=zE>33>Q=ŧ>Q>p>>p>\>Z>\>Ǯ>K>Ǯ>>U#>>?>> =?>R> =>(?p>(>G? >G>ff@a>ff>@'ܡ>>@V>>@->>H@Hp>H?@;??\@}?\?A~??A9n?? =q@8? =q? @e_? ?\)@?\)?@??zA 7?z? =A,j? =?AH*??(A_8?(?RAy·?R?!GA?!G?# A?# ?&ffA7?&ff?(A·?(?+A7d?+?.{B +?.{?0B?0?333A ?333?5B?5?8QB,?8Q?:HB9N?:H?=pBL?=p?@B`'?@?B\Bu?B\?EB?E?GB?G?J=qB?J=q?LBl?L?O\)B],?O\)?QBo?Q?TzB?Tz?W =B{Cm@>{@>RC=@>R@?\)C@?\)@@C@@@@C@@@AGC@AG@AC@A@B\Cd@B\@C33C@C33@C C'e@C @DzCx@Dz@EC@E@EC @E@FffC_@Fff@G =C@G =@GC9@G@HQCZ@HQ@HCtx@H@ICoo@I@J=qC3@J=q@JHC@JH@KC@K@L(CIJ@L(@LCK@L@MpCe3@Mp@N{CK@N{@NRC@NR@O\)C=@O\)@PC@P@PCk@P@QGCl@QG@QC@Q@R\CB-@R\@S33Cx@S33@S C@S @TzC@Tz@UCQ8@U@UC@U@VffC!@Vff@W =C@W =@WC@W@XQCm@XQ@XC@X@YCr@Y@Z=qC&@Z=q@ZHCUG@ZH@[Cz@[@\(C@\(@\C;@\@]pC@]p@^{C8*@^{@^RCoD@^R@_\)C@_\)@`C@`@`C1@`@aGCR@aG@aC@a@b\CZ@b\@c33C׉@c33@c C2@c @dzC-W@dz@eCY@e@eCw@e@fffC,@fff@g =C@g =@gCH@g@hQC@hQ@hC9,@h@iCWd@i@j=qCs@j=q@jHC@jH@kC@k@l(C@l(@lCw@l@mpCt@mp@n{C@n{@nRC%@nR@o\)C,[@o\)@pC2@p@pC@(@zCtU@z@Cs"@@Cq@@pCp@p@Co̕@@{Cna@{@ffCm@ff@RCl@R@ =Ckhz@ =@\)Cj;@\)@Ci-@@Ch@@QCfs@Q@Ce"@@Cdl@@GCc@G@Cb|@@Caw@@=qC`U"@=q@\C_2@\@HC^/@H@33C]@33@C[@@ CZפ@ @(CY@(@zCX @z@CW@@CVF@@pCU@p@CTu@@{CS@{@ffCR{F@ff@RCQzR@R@ =CP|@ =@\)COu>@\)@CNcL@@CMR@@QCLH@Q@CKG@@CJGG@@GCI/@G@CH@@CG@@=qCE@=q@\CD@\@HCCۇ@H@33CBa@33@CA@@ C@Z@ @(C?@(@zC>+@z@C=Z@@C<@@pC;k@p@C:@@{C9@{@ffC8@ff@RC7j@R@ =C6Y[@ =@\)C5I@\)@C4/@@C3~@@QC2@Q@C0q@@C/@@GC.@G@C-@@C,@@=qC+@=q@\C* @\@HC),@H@33C(~M@33@ÅC'r@Å@ C&d @ @(C%V@(@zC$8@z@C#q@@C"@@pC!3@p@C @@{C*@{@ffCڱ@ff@ƸRCI@ƸR@ =Cۺ@ =@\)C%@\)@ǮC@Ǯ@C@@QC@Q@ȣCr@ȣ@Cd@@GC@G@əC@ə@C@@=qCM@=q@ʏ\C@ʏ\@HC@H@33C@33@˅C @˅@ C @ @(C @(@zC @z@C V@@C@@pC>@p@C@@{C֕@{@ffCy@ff@θRCث@θR@ =C"@ =@\)C@\)@ϮC@Ϯ@B@@QB@Q@УBk@У@B6B@@GB7@G@љB;6@љ@BRJ@@=qB|@=q@ҏ\B@ҏ\@HB@@H@33B@33@ӅB>@Ӆ@ B)@ @(B`@(@zB剖@z@B;@@B@@pB+ @p@Bo@@{B܎@{@ffBگ@ff@ָRB@ָR@ =B.@ =@\)Bz@\)@׮Bӵ6@׮@B@@QB6@Q@أBΉ*@أ@Bx@@GB @G@ٙB>7@ٙ@Bǂ~@@=qBݼ@=q@ڏ\B<@ڏ\@HBŸe@H@33BL@33@ۅBe@ۅ@ B@ @(B _@(@zBu@z@B@@B:m@@pBG@p@B=@@{B@{@ffBB@ff@޸RBJ@޸R@ =BY@ =@\)B@\)@߮B1@߮@B@@QB-@Q@B%@@B@@@GB9F@G@ᙚB}@ᙚ@BoF@@=qB@=q@\B@\@HBUL@H@33B@33@Bm@@ B=^@ @(B@(@zB@z@B2?@@B?@@pB@p@B@@{B1u@{@ffB@ff@RBa@R@ =B~,@ =@\)Bd@\)@B(@@B@@QBq@Q@B@@Bn@@GB0R@G@陚BM@陚@B@@=qB@=q@\B~@\@HB|@H@33Bze7@33@Bx @@ Buó@ @(Bsrq@(@zBqM@z@Bo+r@@Bl3@@pBj@p@Bh}@@{Bf@{@ffBd@ff@RBb@R@ =B`@ =@\)B^@\)@B\@@BZU@@QBX@Q@BVq@@BU@@GBS/@G@BQMp@@BOn@@=qBN@=q@\BLA@\@HBJw@H@33BHM@33@BFe@@ BD@ @(BC@(@zBAg@z@B?@@B> @@pB<)@p@B;@@{B9o~@{@ffB7@ff@RB6:X@R@ =B4@ =@\)B3@\)@B1H@@B06@@QB.@Q@B-=@@B+s@@GB*.@G@B(@@B'+@@=qB%Ӣ@=q@\B${@\@HB#@H@33B!{@33@B Rz@@ B@ @(By @(@zB>2@z@B@@B@@pBj@p@B@@{BX@{@ffB=@ff@RBR@R@ =B#6@ =@\)B@\)@B`@ABq(AA(B 9A(AQB AQAzB NAzAB AABBAABmAABfAAGB`AGApBC ApAB&mAABAABAA{AA{A=qAuA=qAffA\AffA\AUA\ARAaARAHAnAHA =AA =A33AA33A\)AzA\)AA~AAAjAA AA AAAA(AA(AQAoAQAzAdAzAAHAAA`iAAAܞSAAA>AAGAAGApA-ApAAIjAAAzAAAѿAA{ApA{A=qAFA=qAffẢAffA\AA\ARA?ARAHAj AHA =AQA =A33ABA33A\)A®A\)AA-AAAAA A A AAAA(AA(AQAAQAzA?AzAAAAAAAA'AA AoA A GAtA GA pA#A pA A7A A As1A A AA A {AA {A =qAI~A =qA ffAA ffA \AA \A RAgA RA HAA HA =A^A =A 33AuA 33A \)A!wA \)A AA A AtA A A,A A AA A (AA (A QAPA QA zAA zA A]A A AyA A A2A A AA A GAA GA pAU^A pA A A A AyA A AA A{ATrA{A=qA!}A=qAffA6AffA\AXA\ARAGMARAHAAHA =AA =A33AA33A\)AEvA\)AA~sAAA{|AA AxOA AAvnAA(AsPA(AQApAQAzAmcAzAAkpAAAi7?AAAfAAAdrAAGAbTPAGApA_uApAA]7GAAAZAAAXM1AA{AUA{A=qASPA=qAffAQAffA\AOFA\ARALARAHAJnAHA =AH\A =A33AFA33A\)ACbA\)AAAEAAA?AA A=Y"A AA;AA(A8A(AQA6AQAzA4AzAA2AAA0gAAA.6AAA,ãAAGA*AGApA)%AApAA'ZzAAA%AAA#AA{A!A{A=qA 3=A=qAffAtAffA\AA\ARAARAHA2FAHA =AyyA =A33AA33A\)A DA\)AAOAAAAA AA AA JkAA(A A(AQA AQAzAvAzAAEAAA\.AAASAAAEAAGAAGAp@NApA@ VAA@AA@& AA{@>A{A=q@xA=qAff@yAffA\@݊A\AR@ARAH@AHA =@A =A33@I9A33A\)@pA\)A@ؕAA@AA @ }A A@YAA(@͐A(AQ@ʰKAQAz@7AzA@AA@68AA@YAA@݁AAG@?AGAp@ApA@AA@erAA@;AA{@'A{A=q@A=qAff@AffA\@lA\AR@^ARAH@0AHA =@A =A33@GRA33A\)@!A\)A@>AA@CAA @A A @A A (@A (A Q@2A QA z@A zA @nA A @1A A @A A!@LA!A!G@|yA!GA!p@wA!pA!@rA!A!@n"A!A!@i5A!A"{@d^A"{A"=q@`X,A"=qA"ff@[ƜA"ffA"\@WJFA"\A"R@RA"RA"H@NA"HA# =@JKA# =A#33@EOA#33A#\)@AQA#\)A#@.A-A-G>A-GA-p>Z6A-pA->ȳA-A->Y,A-A-> A-A.{>bA.{A.=q>+A.=qA.ff>"A.ffA.\>~A.\A.R>A.RA.H>A.HA/ =>XUA/ =A/33>2A/33A/\)>A/\)A/>A/A/>qA/A/ >]A/ A0>Bf