Eighth SWAS Public Data Release

The eighth SWAS public data release consists of a complete set of SWAS data from mission day 0049 (the first day of usable science data) to mission day 1509. The SWAS mission defines mission day 0001 as November 01, 1998.

The SWAS service provides a link to a "5-panel plot", generated by SWAS operation center. In JPEG-format, the "5-panel plot" shows a cummulative (grand) spectral co-addition for the nominal center position (offsets of 0'', 0'' in RA and Dec) of the target. In a few cases a non-zero offset position was used due to the lack of data at the nominal center position. The plot includes informative statistics: target position, offsets, local velocity as measured with [CI], and integration time per spectral channel.

The eighth data release was delayed after we discovered a bug in the data processing pipeline software where the leap year correction for the year 2000 was not properly taken into account. For SWAS mission days after February 28, 2000, the translation from running mission day to emphemeris dates was off by one day. The primary effect of this bug was incorrect velocity corrections for solar system targets. For most solar system objects observed by SWAS (and all fixed targets), an error of one day results in an insignificant difference in the velocity corrections. However, for three comets, the day-to-day changes in velocity were large enough to warrant reprocessing of the data in the corrected pipeline software and to re-release these data to the public.

                           SWAS Eighth Public Release
                      Leap Year Reprocessing for Comets
             ======================================================
                                                   Mission days
                                                previously released
               target name      Class name        to the public
             ------------------------------------------------------
             Comet LINEAR A2   (c_lineara2)         0971-1006
             Comet LINEAR WM1  (c_linearwm1)        1093-1141
             Comet Ikeya-Zhang (c_ikeya-zhang)      1272-1332

The following previously released sources have additional data for this release period.

target name            R.A.  (J2000)  Dec.    Epoch         l         b
-------------------------------------------------------------------------

         BO_MIC  20:47:44.88  -36:35:40.9  2000.00       6.2490  -38.2505
      G10.6-0.4  18:10:28.56  -19:55:49.1  2000.00      10.6234   -0.3833
          M17SW  18:20:48.84  -16:12:37.1  2000.00      15.0647   -0.7702
   G34.3+0.1+15  18:53:19.32    1:14:46.0  2000.00      34.2558    0.1489
         RX_BOO  14:24:11.52   25:42:14.0  2000.00      34.2777   69.2130
    G45.07+0.13  19:13:21.72   10:50:52.4  2000.00      45.0704    0.1333
         BE_CET   0:22:51.96  -12:12:33.8  2000.00      97.3616  -73.6461
        NGC7023  21:01:33.24   68:07:16.3  2000.00     104.0243   14.1702
          CEPHB  22:57:14.76   62:37:31.1  2000.00     110.2249    2.6051
       IVC135.6  11:49:53.76   61:18:24.1  2000.00     135.5373   54.2897
             B5   3:47:41.64   33:13:36.8  2000.00     160.3012  -16.5646
          S252A   6:08:36.96   20:39:09.0  2000.00     189.7804    0.3510
           S255   6:12:53.64   17:59:29.0  2000.00     192.5982   -0.0484
        NGC2024   5:41:44.52   -1:49:10.9  2000.00     206.4583  -16.3104
          MONR2   6:07:53.04   -6:20:16.1  2000.00     213.6739  -12.5577
         LQ_HYA   9:32:25.44  -11:11:04.6  2000.00     244.5868   28.4007
        HD73882   8:39:09.36  -40:25:09.8  2000.00     260.1815    0.6427
          RCW34   8:56:30.84  -43:05:04.9  2000.00     264.2891    1.4850
    DC267.4-7.5   8:25:44.40  -51:02:04.9  2000.00     267.3865   -7.5097
      GJ_3400_A   6:38:00.24  -61:32:00.2  2000.00     271.2060  -25.1952
         AB_DOR   5:28:44.76  -65:26:55.0  2000.00     275.3007  -33.0457
     G291.3-0.7  11:11:37.68  -61:23:01.0  2000.00     291.2740   -0.7917
     G294.5-1.6  11:35:31.92  -63:14:51.0  2000.00     294.5116   -1.6234
     G327.3-0.5  15:53:08.88  -54:37:01.2  2000.00     327.2944   -0.5784
     G336.5-1.5  16:40:00.12  -48:54:32.0  2000.00     336.4565   -1.5060
      RHO_OPH_A  16:25:55.20  -24:23:02.0  2000.00     353.0027   17.0100
           RCRA  19:01:52.32  -36:57:40.0  2000.00     359.9231  -17.8507
  C_IKEYA-ZHANG  --:--:--.--   --:--:--.-  ----.--      --.----   --.----
        JUPITER  --:--:--.--   --:--:--.-  ----.--      --.----   --.----

target name            R.A.  (J2000)  Dec.    Epoch         l         b
-------------------------------------------------------------------------

     G5.89-0.39  18:00:30.60  -24:04:02.6  2000.00       5.8853   -0.3933
       ZETA_OPH  16:37:09.48  -10:34:03.0  2000.00       6.2808   23.5876
    G10.47+0.03  18:08:36.60  -19:52:02.6  2000.00      10.4662    0.0310
    G12.21-0.01  18:12:39.96  -18:24:23.0  2000.00      12.2081   -0.1032
            M16  18:18:51.12  -13:50:02.4  2000.00      16.9360    0.7692
    G23.95+0.15  18:34:27.12   -7:54:52.9  2000.00      23.9576    0.1423
    G29.96-0.02  18:46:04.08   -2:39:21.6  2000.00      29.9562   -0.0174
    G31.41+0.31  18:47:34.80   -1:12:46.1  2000.00      31.4128    0.3050
    G32.96+0.28  18:50:30.84   -0:01:58.4  2000.00      32.7974    0.1904
    G33.23-0.24  18:52:50.52    0:55:28.6  2000.00      33.9149    0.1091
          MBM40  16:10:23.16   21:51:44.6  2000.00      37.6064   44.7186
      IRC+20326  17:31:54.84   17:45:20.2  2000.00      40.7977   25.2959
       HD210121  22:06:16.56   -3:27:52.2  2000.00      56.5642  -44.0311
    G60.89-0.13  19:46:20.28   24:35:30.1  2000.00      60.8848   -0.1291
           S106  20:27:32.76   37:22:44.0  2000.00      76.3940   -0.6382
        NML_CYG  20:46:25.32   40:06:59.4  2000.00      80.7980   -1.9205
          MBM55  23:08:29.76   14:36:15.8  2000.00      88.8866  -41.3634
          MBM54  23:09:16.56   18:29:16.4  2000.00      91.6280  -38.0961
          MBM53  23:08:10.32   22:53:15.4  2000.00      93.9490  -34.1072

       HD210072  22:06:17.64   55:14:49.2  2000.00     100.8378   -0.3768
      HD_112429  12:55:28.56   65:26:18.6  2000.00     122.2550   51.6844
        HD21483   3:28:46.56   30:22:32.2  2000.00     158.8724  -21.3029
        HD26571   4:12:49.32   22:24:49.3  2000.00     172.4108  -20.5592
          L1527   4:39:54.00   26:03:10.8  2000.00     173.8234  -13.5235
           HH24   5:46:09.48   -0:09:55.8  2000.00     205.4782  -14.5605
       ORI8_NH3   5:36:20.52   -6:22:34.3  2000.00     210.0721  -19.5905
           S297   7:05:06.72  -12:18:15.8  2000.00     225.4325   -2.5976
           BBW4   7:04:21.36  -16:23:40.9  2000.00     228.9981   -4.6231
           S302   7:32:12.12  -16:58:17.0  2000.00     232.6261    1.0034
        G236+39   9:42:10.80    1:19:16.7  2000.00     234.3685   37.8607
           S310   7:24:07.56  -25:53:47.0  2000.00     239.5886   -4.8957
    G254.7+0.18   8:20:42.72  -36:13:20.3  2000.00     254.6611    0.1838
        HD62542   7:42:37.08  -42:13:46.9  2000.00     255.9149   -9.2373
     G261.6-2.1   8:32:09.60  -43:13:45.8  2000.00     261.6462   -2.0866
    G269.5-1.47   9:03:14.04  -48:55:30.4  2000.00     269.4589   -1.4724
     G270.3+0.8   9:16:41.52  -47:55:55.9  2000.00     270.2522    0.8384
    G274.1-1.14   9:24:26.64  -51:59:20.8  2000.00     274.0051   -1.1432
     G285.3-0.1  10:31:28.56  -58:02:47.0  2000.00     285.2651   -0.0583
       CIRCINIS  15:00:30.96  -63:06:51.8  2000.00     316.9349   -3.8071
       HD154368  17:06:28.44  -35:27:04.0  2000.00     349.9704    3.2147
       HD147084  16:20:38.04  -24:10:09.1  2000.00     352.3277   18.0506
   G359.44-0.01  17:44:41.64  -29:28:03.7  2000.00     359.4412   -0.1051
          VENUS  --:--:--.--   --:--:--.-  ----.--      --.----   --.----

• (a) As was pointed out by the folks at the IRSA for the 3rd public data release, there seems to be a problem with duplicate entries in the FITS-format archive where individual positions of several sources appear to have duplicate, identical grand co-adds for each spectra line (in other words, the line spectra are 725x2 in dimension instead of 725x1). This appears to be an IRAF problem. The SWAS-Science Operations Center (SWAS-SOC) will try to correct this problem in the final archive release for the mission which will occur in September 2004.

 
• (b) Since public data release three, the SWAS Science Operations Center has chosen not to provide FITS-format, grand co-add files for moving and/or time-variable targets. Such a grand co-add would be misleading and confusing to archive users. The SWAS SOC recommends that archive users work with the Class-format files for these targets.

                           SWAS Public Release
                    Moving Targets/Time-Variable Targets
                    ====================================
                       name           Class name
                    ------------------------------------
  
                    Comet Lee         (c_lee)
                    Comet McNaught    (c_mcnaught)
                    Comet LINEAR A2   (c_lineara2)
                    Comet LINEAR WM1  (c_linearwm1)
                    Comet Ikeya-Zhang (c_ikeya-zhang)
                    Jupiter           (jupiter)
                    Mars              (mars)
                    Saturn            (saturn)
                    Venus             (venus)