Long-term Schedule

This is the latest long-term schedule. Observations have been sorted into one-week intervals, taking into account solar, time, roll, and other constraints. It is our intent to follow this schedule. However, targets which are not constrained may well be moved forward or back in time to fill requirements of the short-term schedules. Targets of opportunity and any instrument or spacecraft anomalies may also cause observing times of targets to shift. This long-term schedule is our present estimate of future order of observations. Please be aware of the uncertainties.

Also notice that targets have been allotted to week intervals to fill only about half of real-time. This figure is significantly less than Chandra's available observing time. To achieve fully scheduled weeks, and to increase Chandra's efficiency we must allow the short-term scheduler some flexibility in target choice. This is done by reserving a pool of unconstrained targets with broad viewing windows, These targets are listed at the end of the long-term schedule, and may be scheduled at any time during the cycle to fill undersubcribed weeks.

The long term schedule page has links to our database entries of the requested observing parameters as well as to images of the target fields of view. Observers are encouraged to review these entries and notify the Chandra Director's Office of any perceived problems. Observers may be contacted about a month prior to the detailed scheduling of their targets for final confirmation of the observing parameters. Note that the images accompanying the target pages assume a roll angle appropriate for the middle of the week to which the target has been assigned in the long-term schedule. This approximation, made for initial review purposes only, may not always respect accepted roll constraints. This will be corrected in the final scheduling process, which may also result in different guide stars than those shown in the optical image. Also, those targets allocated to the pool may be moved multiple times; the roll angles for their images are thus unlikely to correspond to the final orientation. Updates will be issued at the time of rescheduling.

If simultaneous observations with other instruments are a vital part of your program and if they were part of your peer-reviewed proposal, a time-constraint should be already applied to your target. Barring malfunctions, it will be honored. After a proposal has been reviewed and accepted, the addition of constraints, or changes in object, position or exposure time will not be honored. If you have added coordinated observations later or if only a secondary part of the science, we cannot perturb the normal scheduling to give you a definite time.

NOTE: In the text of the Long-term Schedule, pool targets are marked with a "P", and roll and pitch angles for observations in an assigned week given are for the week's midpoint.

Chandra X-ray Observatory Long-term Schedule

Click here for a list of changes from the last LTS
Click here for banner definitions.

Segment:  62  limit:   7.00d, used   3.62d = 51.71%   30-Nov-2009 00h to 07-Dec-2009 00h (UT)

 #Orbits:  2  Orbit Time: 427.45ks   LTS Time: 313.00ks  Bad Pitch: 120.00ks (76.68%) Cold: 193.00ks  P-Line:   0.00ks  <75:  40.00ks  (130 to 150):   0.00ks  (150 to 156): 193.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
300255    12032             CH Cygni   29.0  291.138  50.241 321.8  81.0 ACIS-S 6 0 HETG              Mukai  TOO   10  0  N  N  N  N  N   N      hermanm  11/11/09   10300566  
300255    12034             CH Cygni   29.0  291.138  50.241 321.8  81.0 ACIS-S 6 0 HETG              Mukai  TOO   10  0  N  N  N  N  N   N           not approved   10300566  
300255    12035             CH Cygni   22.0  291.138  50.241 321.8  81.0 ACIS-S 6 0 HETG              Mukai  TOO   10  0  N  N  N  N  N   N           not approved   10300566  
702156    11570       TOOT 1626+4523   40.0  246.702  45.395   3.2  67.6 ACIS-S 6 2 NONE            Croston   GO   11  0  N  N  N  N  N   N          emk  11/13/09   11700510  
800855    11713 Perseus cluster, Abe  114.0   49.883  41.630 227.0 154.3 ACIS-I 6 2 NONE             Fabian   GO   11  0  N  N  N  N  N   N        maxim  08/31/09   11800102  
800856    11715 Perseus cluster, Abe   79.0   49.934  41.422 227.2 154.4 ACIS-I 5 0 NONE             Fabian   GO   11  0  N  N  N  N  N   N        maxim  08/27/09   11800102  


Segment:  63  limit:   7.00d, used   3.93d = 56.14%   07-Dec-2009 00h to 14-Dec-2009 00h (UT)

 #Orbits:  3  Orbit Time: 422.15ks   LTS Time: 339.40ks  Bad Pitch:  36.40ks (24.85%) Cold: 113.00ks  P-Line:   0.00ks  <75: 190.00ks  (130 to 150): 113.00ks  (150 to 156):   0.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200563    09950       Alpha Centauri   10.0  219.881 -60.834 128.4  45.9  HRC-I - - NONE              Ayres   GO   10  0  S  N  N  N  N   P      kashyap  11/21/08   10200304  
300262    10885                  M31   18.4   10.685  41.269 273.7 121.9  HRC-I - - NONE            Pietsch   GO   10  0  S  N  N  N  N   N         juda  07/09/09   11300009  
600795    11276                  M31    5.0   10.685  41.269 273.7 121.9 ACIS-I 6 2 NONE            Galache   GO   11  0  S  N  N  N  N   Y         zhao  10/13/09   11620280  
701974    11387              Mrk 509  140.0  311.041 -10.724 290.8  52.3  HRC-S - - LETG            Kaastra   GO   11  0  N  N  N  P  Y   Y       jdrake  08/12/09   11700108  
701974    11388              Mrk 509   40.0  311.041 -10.724 290.8  52.3  HRC-S - - LETG            Kaastra   GO   11  0  N  N  N  P  Y   Y       jdrake  08/12/09   11700108  
702136    11550          HE0435-1223   13.0   69.562 -12.287 347.4 143.9 ACIS-S 5 4 NONE           Kochanek   GO   11  0  S  N  N  N  N   Y          emk  11/09/09   11700501  
702172    11586         Pictor A Jet   13.0   79.933 -45.776   2.3 111.2 ACIS-S 6 4 NONE         Hardcastle   GO   11  0  N  P  N  N  N   N          emk  11/12/09   11700633  
800938    11714 Perseus cluster, Abe  100.0   49.928  41.569 239.7 150.3 ACIS-I 5 0 NONE             Fabian   GO   11  0  N  N  N  N  N   N        maxim  08/27/09   11800102  


Segment:  64  limit:   7.00d, used   4.46d = 63.71%   14-Dec-2009 00h to 21-Dec-2009 00h (UT)

 #Orbits:  3  Orbit Time: 388.80ks   LTS Time: 385.40ks  Bad Pitch: 125.40ks (80.90%) Cold: 130.00ks  P-Line:  20.00ks  <75: 110.00ks  (130 to 150): 130.00ks  (150 to 156):   0.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200625    10994              Procyon   70.0  114.825   5.225  54.5 146.3  HRC-S - - LETG       Beiersdorfer   GO   11  0  N  N  N  N  N   N           not approved   11200282  
200649    11020               LkCa 4   20.0   64.117  28.127 260.8 160.4 ACIS-S 1 0 NONE              BROWN   GO   11  0  N  N  N  N  P   P        swolk  11/02/09   11200754  
300263    10886                  M31   18.4   10.685  41.269 278.8 116.4  HRC-I - - NONE            Pietsch   GO   10  0  S  N  N  N  N   N         juda  07/09/09   11300009  
501325    11240         Cassiopeia A   50.0  350.858  58.815 286.2 107.6  HRC-I - - NONE            Delaney   GO   11  0  N  Y  N  N  N   N         juda  09/09/09   11500712  
501326    11241       SNR E0519-69.0   52.0   79.895 -69.035 355.0  87.5 ACIS-S 6 2 NONE             Hughes   GO   11  0  N  N  N  N  N   N     plucinsk  11/18/09   11500714  
600731    10538        Superantennae   28.0  292.839 -72.655 212.8  51.6 ACIS-S 1 0 NONE               Ptak   GO   10  0  N  N  N  N  N   N       depasq  12/03/08   10610708  
600731    11797        Superantennae   35.0  292.839 -72.655 212.8  51.6 ACIS-S 1 0 NONE               Ptak   GO   10  0  N  N  N  N  N   N           not approved   10610708  
600731    11798        Superantennae   12.0  292.839 -72.655 212.8  51.6 ACIS-S 1 0 NONE               Ptak   GO   10  0  N  N  N  N  N   N           not approved   10610708  
701787    10244             3C 326 W   35.0  237.930  20.072  32.9  51.0 ACIS-I 5 1 NONE         Birkinshaw   GO   10  0  N  N  N  N  N   N          emk  10/20/08   10700504  
701831    10288                  M87    5.0  187.704  12.392  64.4  83.8 ACIS-S 1 0 NONE             Harris   GO   10  2  S  N  N  N  N   P          emk  08/19/09   10700119  
702017    11431         PKS 0605-085   60.0   91.999  -8.581  11.5 147.4 ACIS-S 1 0 NONE         Hardcastle   GO   11  0  N  P  N  N  N   N          emk  11/12/09   11700256  


Segment:  65  limit:   3.85d, used   4.41d =114.55%   21-Dec-2009 00h to 28-Dec-2009 00h (UT)

 #Orbits:  2  Orbit Time: 440.94ks   LTS Time: 382.00ks  Bad Pitch: 112.00ks (57.44%) Cold: 270.00ks  P-Line:   0.00ks  <75:  12.00ks  (130 to 150):   0.00ks  (150 to 156): 270.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200625    12042              Procyon   70.0  114.825   5.225  46.9 152.2  HRC-S - - LETG       Beiersdorfer   GO   11  0  N  N  N  N  N   N           not approved   11200282  
200646    11017              Eta Car   40.0  161.265 -59.685  59.9  80.2 ACIS-S 6 2 HETG           Corcoran   GO   11  0  P  N  N  N  N   N           not approved   11200668  
200646    11992              Eta Car   40.0  161.265 -59.685  59.9  80.2 ACIS-S 6 2 HETG           Corcoran   GO   11  0  P  N  N  N  N   N           not approved   11200668  
300268    11027      RX J0806.3+1527  160.0  121.597  15.458  69.0 152.0  HRC-S - - LETG         Strohmayer   GO   11  0  N  N  N  N  N   N           not approved   11300603  
300268    11028      RX J0806.3+1527   40.0  121.597  15.458  69.0 152.0  HRC-S - - LETG         Strohmayer   GO   11  0  N  N  N  N  N   N           not approved   11300603  
401116    11081                IC 10   15.0    5.072  59.304 280.8 111.0 ACIS-S 6 5 NONE            Laycock   GO   11  0  S  N  N  N  N   N       nadams  10/15/09   11400795  
501341    11824      RX J2143.0+0654   12.0  325.764   6.905 302.3  59.7 ACIS-S 1 0 NONE             Kaplan  GTO   11  0  Y  N  N  N  N   N     plucinsk  11/19/09   11500036  
600769    10719                  M31    5.0   10.685  41.269 283.5 110.7 ACIS-I 6 2 NONE             Garcia  GTO   10  0  Y  N  N  N  Y   Y       depasq  12/03/08   10620040  


Segment:  66  limit:   3.85d, used   2.04d = 52.99%   28-Dec-2009 00h to 04-Jan-2010 00h (UT)

 #Orbits:  3  Orbit Time: 408.66ks   LTS Time: 176.00ks  Bad Pitch:  56.00ks (37.33%) Cold: 120.00ks  P-Line:   0.00ks  <75:  56.00ks  (130 to 150): 100.00ks  (150 to 156):  20.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200630    10999              LkCa 15   10.0   69.824  22.351 277.5 151.5 ACIS-S 6 2 NONE             Guedel   GO   11  0  N  N  N  N  N   N           not approved   11200332  
200631    11000           CoKu Tau/4   10.0   70.320  28.667 265.5 152.1 ACIS-S 6 2 NONE             Guedel   GO   11  0  N  N  N  N  N   N           not approved   11200332  
200645    11016               HH 154   70.0   67.892  18.134 284.8 148.9 ACIS-S 6 3 NONE          Schneider   GO   11  0  N  N  N  N  N   N           not approved   11200621  
590499    11956 E0102-72 I3,-120,-0.   20.0   16.010 -72.032 282.3  69.7 ACIS-I 1 0 NONE        Calibration  CAL   11  0  Y  N  N  Y  N   N           not approved   11500924  
590500    11957 E0102-72 S3,-120,1,0   20.0   16.010 -72.032 282.3  69.7 ACIS-S 1 0 NONE        Calibration  CAL   11  0  Y  N  N  Y  N   N           not approved   11500924  
590501    11958 E0102-72 S1,-120,13.    8.0   16.010 -72.032 282.3  69.7 ACIS-S 1 0 NONE        Calibration  CAL   11  0  Y  N  N  Y  N   N           not approved   11500924  
590502    11959 E0102-72 S2,-120,5.1    8.0   16.010 -72.032 282.3  69.7 ACIS-S 1 0 NONE        Calibration  CAL   11  0  Y  N  N  Y  N   N           not approved   11500924  
900912    11777              NGC2778   30.0  138.102  35.028 100.1 145.5 ACIS-S 6 2 NONE           Gultekin   GO   11  0  N  N  N  N  P   P          das  08/17/09   11900514  


Segment:  67  limit:   3.85d, used   2.66d = 69.09%   04-Jan-2010 00h to 11-Jan-2010 00h (UT)

 #Orbits:  3  Orbit Time: 388.80ks   LTS Time: 230.00ks  Bad Pitch:  70.00ks (41.18%) Cold: 160.00ks  P-Line:   0.00ks  <75:   0.00ks  (130 to 150): 160.00ks  (150 to 156):   0.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200640    11010               DG Tau  160.0   66.770  26.105 273.5 141.9 ACIS-S 6 2 NONE             Guedel   GO   11  0  N  N  N  N  N   N           not approved   11200420  
501159    10703         Cassiopeia A   70.0  350.866  58.812 304.5  95.9 ACIS-S 6 0 HETG            DeLaney  GTO   10  0  N  Y  N  N  N   Y          nss  10/30/08   10500065  


Segment:  68  limit:   3.85d, used   1.85d = 48.05%   11-Jan-2010 00h to 18-Jan-2010 00h (UT)

 #Orbits:  2  Orbit Time: 454.49ks   LTS Time: 160.00ks  Bad Pitch: 120.00ks (150.00%) Cold:  40.00ks  P-Line:   0.00ks  <75:   0.00ks  (130 to 150):  15.00ks  (150 to 156):  25.00ks 

 seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------
200546    09930               GM Aur   15.0   73.796  30.366 266.8 141.1 ACIS-S 1 0 NONE            Herczeg   GO   10  0  S  N  N  N  P   Y        swolk  07/21/09   10200804  
200656    12009             V838 Mon   25.0  106.020  -3.848 338.9 153.0 ACIS-S 6 5 NONE            Kastner  DDT   10  0  Y  N  N  N  N   N        swolk  10/16/09   10208330  
600738    10545               M82-SE  103.0  149.032  69.659 140.2 127.7 ACIS-S 4 2 NONE         Strickland   GO   10  2  N  N  N  N  N   P       depasq  10/23/08   10610785  
600738    11800               M82-SE   17.0  149.032  69.659 140.2 127.7 ACIS-S 4 2 NONE         Strickland   GO   10  1  N  N  N  N  N   P           not approved   10610785  


701945    10402             WPVS 007   20.0    9.816 -51.284   0.0   0.0 ACIS-S 6 2 NONE            Leighly   GO   10  0  N  N  N  N  Y   P          emk  12/02/08   10700917  
790200    10663               Mkn421   15.0  166.113  38.209   0.0   0.0 ACIS-S 6 1 HETG        Calibration  CAL   10  1  S  N  N  Y  N   N          lpd  10/21/09   10700928  
790202    10665               Mkn421   10.0  166.113  38.209   0.0   0.0  HRC-S - - LETG        Calibration  CAL   10  1  S  N  N  Y  N   N      hermanm  05/06/09   10700928  
790204    10667               Mkn421   10.0  166.113  38.209   0.0   0.0  HRC-S - - LETG        Calibration  CAL   10  1  S  N  N  Y  N   N      hermanm  05/06/09   10700928  
790205    10668               Mkn421   10.0  166.113  38.209   0.0   0.0 ACIS-S 6 1 LETG        Calibration  CAL   10  1  S  N  N  Y  N   N      hermanm  05/06/09   10700928  
790206    10669               Mkn421   10.0  166.113  38.209   0.0   0.0  HRC-S - - LETG        Calibration  CAL   10  1  S  N  N  Y  N   N      hermanm  05/06/09   10700928  
790207    10670               Mkn421   15.0  166.113  38.209   0.0   0.0 ACIS-S 6 1 HETG        Calibration  CAL   10  1  S  N  N  Y  N   N          lpd  06/29/09   10700928  


  Pool Targets 
  seq#     obs           name           time    RA      dec   Roll  Pitch   SI   R O grat         observer    Type AO OR# TC RC PC UC Mlt CRem     Approved           Propsal #
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  LTS changes 
  seq#     obsid          target       SI    grat         observer   old LTS bin      new LTS bin
------------------------------------------------------------------------------------------------
200640    11010               DG Tau ACIS-S NONE             Guedel 28-Dec-2009  --> 04-Jan-2010
200625    10994              Procyon  HRC-S LETG       Beiersdorfer (not in lts) --> 14-Dec-2009
300255    12034             CH Cygni ACIS-S HETG              Mukai (not in lts) --> 30-Nov-2009
300255    12035             CH Cygni ACIS-S HETG              Mukai (not in lts) --> 30-Nov-2009
200625    12042              Procyon  HRC-S LETG       Beiersdorfer (not in lts) --> 21-Dec-2009

BANNER DEFINITIONS:
# Orbits : The number of orbit starts that occur in the week.
Orbit time : Estimate of the observing time available in the week.
LTS Time : Amount of LTS time currently scheduled for the week. If the week has moved into the planning process (ie. limit : 7.00d), then pool targets are included in these numbers.
Bad Pitch : Total time scheduled in the week at bad pitch, based on current definitions.
Cold : Total time scheduled in the week at cold pitch, based on current definitions.
Pline : Total time scheduled in the week in the propline pitch zone, based on current definitions.
Percentage : (bad pitch time) / (Available bad time => (# of orbits)*30 ks/orbit + (1/2)(cold pitch time))
    For example . . .
    IF: max. bad pitch/orbit = 30ks, # orbits in the week = 3, week contains 60ks of bad pitch and 60 ks of cold pitch
    THEN: the week is 1/2 full of bad pitch, or 50%.

Last modified: 11/23/09

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