RXTE Galactic Center Observation

Observation Date:2000-02-10
Mission Day:2231r
Modified Julian Day: 51584.755
Mission times: 192823649.00- 192832921.00
Scan type:cross

Main Page: Observation List | Source List
Observation Page: Top | Commentary | Sources | Scan Light Curves
Map Page: Reconstructed Model | Residuals
Scan Light Curves: Parts 1 | 2 | 3 | 4

PCA Reconstructed model on 2000-02-10 (click a source)

1E1740.7-2942 (265.96,-29.75) 1E1743.1-2843 (266.58,-28.72) 2E1746.7-3225 (267.51,-32.43) 2S1742-294 (266.52,-29.52) 2S1803-245 (271.71,-24.59) 4U 1711-34 (258.58,-34.05) 4U 1728-34 (262.99,-33.83) 4U 1746-371 (267.55,-37.05) 4U 1820-30 (275.93,-30.37) A1744-361 (267.08,-36.12) AX J1749.1-2639 (267.30,-26.65) EXO 1722-363 (261.48,-36.41) EXO 1742-326 (266.37,-32.69) EXO 1745-248 (267.02,-24.78) GCRT J1745-3009 (266.27,-30.16) GCRT J1746-2757 (266.54,-27.95) GRS 1734-292 (264.35,-29.18) GRS 1747-312 (267.69,-31.29) GRS 1747-312B (267.69,-31.29) GRS 1758-258 (270.30,-25.74) GS 1826-238 (277.36,-23.79) GX 1+4 (263.01,-24.75) GX 3+1 (266.98,-26.56) GX 5-1 (270.28,-25.08) GX 9+1 (270.38,-20.53) H1743-322 (266.57,-32.24) IGR J17191-2821 (259.77,-28.35) IGR J17331-2406 (263.28,-24.11) IGR J17375-3022 (264.39,-30.38) IGR J17497-2821 (267.40,-28.36) IGR J17511-3057 (267.79,-30.96) IGR J17586-2129 (269.64,-21.39) KS 1731-260 (263.55,-26.09) KS 1732-273 (264.00,-27.44) KS 1741-293 (266.20,-29.35) MXB 1730-33 (263.35,-33.39) OPH CLU (258.16,-23.39) R 1832-330 (278.93,-32.99) RXJ1709.5-263 (257.38,-26.66) RXS J172006.1 (260.03,-31.28) RXS J172525.5 (261.36,-32.95) RXS J173251.1 (263.21,-34.79) RXS J175428.3 (268.62,-26.34) RXS J180326.2 (270.84,-25.27) RXS J180824.5 (272.10,-23.15) SAXJ1747.0-2853 (266.79,-28.88) SAXJ1750.8-2900 (267.60,-29.03) SAXJ1753.5-2349 (268.39,-23.82) SAXJ1802.7-2017 (270.67,-20.29) SAXJ1805.5-2031 (271.39,-20.51) SAXJ1806.5-2215 (271.64,-22.25) SAXJ1808.4-3658 (272.12,-36.98) SAXJ1808.4-365P (271.12,-35.50) SAXJ1810.8-2609 (272.69,-26.15) SGR 1806-20 (272.16,-20.41) SGR A (266.40,-29.00) SLX 1735-269 (264.56,-27.00) SLX 1737-282 (265.24,-28.31) SLX 1744-300 (266.86,-30.04) SLX 1746-331 (267.46,-33.20) SW J1729.9-3437 (262.54,-34.61) SW J1756.9-2508 (269.24,-25.11) TERZAN 2 (261.89,-30.80) WGAJ1715.3-2635 (258.84,-26.60) XTE J1710-281 (257.55,-28.12) XTE J1710-281P (258.55,-28.91) XTE J1719-291 (259.89,-29.06) XTE J1719-356 (259.97,-35.68) XTE J1720-318 (260.00,-31.75) XTE J1723-376 (260.90,-37.65) XTE J1726-283 (261.66,-28.30) XTE J1728-295 (262.16,-29.52) XTE J1734-234 (263.53,-23.36) XTE J1737-376 (264.50,-37.77) XTE J1739-285 (264.98,-28.48) XTE J1739-302 (264.75,-30.27) XTE J1743-363 (265.74,-36.33) XTE J1744-230 (266.04,-23.12) XTE J1747-274 (266.91,-27.44) XTE J1748-288 (267.02,-28.47) XTE J1751-305 (267.81,-30.62) XTE J1752-223 (268.04,-22.32) XTE J1752-280 (268.20,-28.00) XTE J1755-312 (268.78,-31.16) XTE J1756-342 (269.02,-34.21) XTE J1757-306 (269.41,-30.66) XTE J1759-220 (269.94,-22.03) XTE J1805-295 (271.40,-29.52) XTE J1807-294 (271.74,-29.40) XTE J1812-230 (273.20,-23.00) XTE J1814-338 (273.41,-33.77) XTE J1817-330 (274.43,-33.02) XTE J1818-245 (274.61,-24.54) XTE J1819-254 (274.83,-25.41) XTE J1819-254P (273.83,-26.41)

Commentary

Craig Markwardt writes:
This is a summary of the galactic bulge observation on 10 Feb 2000
(day 2231).  The scan pattern was primarily in the east-west
direction.  There are a few interesting things to report, and I
apologize for the length of this message.

 * SAX J1808-368 has faded considerably.  I had heard reports from the
   pointed observations that the source had "gone."  In truth the
   source is there but very weak - about 5 ct/s/5PCU (2-10 keV) above
   baseline (0.5 mCrab), or around ten sigma.

   It is not clear whether this was the end of a strong outburst which
   occurred while the source was behind the sun, or some smaller
   non-outburst level of activity.

 * We observed two probable bursts (!).  Sharp outbursts are clearly
   distinguishable from a point source because we almost always cover
   the same source in multiple scans.  When a source is bright in one
   scan but not the others, then that's pretty strong evidence for a
   phenomenon lasting less than a few hundred seconds.  From there I
   can do some profile fitting, and sometimes get a rough exponential
   decay, etc.

 * One burst is probably from EXO 1722-363, seen near time 192824450
   MET (10 Feb 2000 18:20 UT).  An extended decay could be seen, which
   I was able to model with an exponential with folding time ~50 s.
   It is difficult to pinpoint the onset of the burst, but if it is
   192824430, then the peak flux was near 167 ct/s (17 mCrab) - not
   huge!

 * Another burst is probably from GRS 1747-312, seen near time
   192826450 (10 Feb 2000 18:54 UT).  This is potentially significant
   since no bursts have been seen from this source to date.  I can say
   that the position fit to GRS 1747-312 is very good, of much better
   quality than that of the nearby SLX 1744-300, from which we have
   seen bursts in the past.  There is however no evidence that either
   the SLX or GRS source has stronger-than-baseline persistent flux,
   and thus no strong evidence of enhanced accretion in either.  No
   time evolution model appears to be required, so I modelled it as a
   constant of about 380 ct/s (38 mCrab).

 * The faintness of these fluxes is worth pondering.  Even at the
   galactic center these fluxes imply luminosities smaller than
   Eddington by a factor of ~100.  However, we need to consider that
   we probably did not catch the onset of the burst in either case,
   which could have occurred 100-200 sec earlier, so I don't there are
   any terrible problems.

 * XTE J1710-281 has become detectable again, at a ~typical flux level
   of 2 mCrab.  This is welcome, as I had feared that it had
   disappeared for good.

Craig


Known Sources: ASCII table

SourceTime (MJD)RA (2000)DEC (2000)Rate (ct/s/5PCU)Error (ct/s/5PCU)Bkg (ct/s/5PCU)
1E1740.7-2942 51584.813 265.9604 -29.75 267.42 27.83 138.90
1E1743.1-2843 51584.827 266.5792 -28.72 -59.61 61.11 364.88
2E1746.7-3225 51584.780 267.5144 -32.43 14.55 4.79 17.53
2S1742-294 51584.816 266.5230 -29.52 78.46 39.02 379.42
2S1803-245 51584.842 271.7090 -24.59 11.90 4.98 13.41
4U_1711-34 51584.779 258.5800 -34.05 15.28 0.83 9.37
4U_1728-34 51584.778 262.9920 -33.83 691.09 16.07 64.26
4U_1746-371 51584.758 267.5523 -37.05 500.86 10.87 4.55
4U_1820-30 51584.776 275.9280 -30.37 1962.10 38.23 3.10
4U_1820-30 51584.782 275.9280 -30.37 2211.87 23.16 3.10
A1744-361 51584.763 267.0800 -36.12 2.19 3.56 16.97
AX_J1749.1-2639 51584.836 267.3000 -26.65 -35.00 26.55 2196.86
EXO_1722-363 51584.765 261.4810 -36.41 23.93 4.11 23.52
EXO_1742-326 51584.780 266.3690 -32.69 30.24 5.59 23.83
EXO_1745-248 51584.846 267.0208 -24.78 0.60 2.71 16.47
GCRT_J1745-3009 51584.803 266.2708 -30.16 -22.53 16.62 281.30
GCRT_J1746-2757 51584.831 266.5417 -27.95 71.86 14.39 34.68
GRS_1734-292 51584.827 264.3533 -29.18 39.88 4.97 22.44
GRS_1747-312 51584.785 267.6900 -31.29 54.87 13.71 417.37
GRS_1747-312B 51584.788 267.6900 -31.29 436.82 30.18 33.06
GRS_1758-258 51584.837 270.3025 -25.74 219.79 14.09 3963.51
GS_1826-238 51584.840 277.3623 -23.79 405.17 2.09 3.43
GX_1+4 51584.846 263.0090 -24.75 167.77 31.40 2.99
GX_1+4 51584.850 263.0090 -24.75 100.55 5.85 2.99
GX_1+4 51584.853 263.0090 -24.75 176.50 8.38 2.99
GX_3+1 51584.834 266.9830 -26.56 3213.74 44.35 -0.24
GX_3+1 51584.839 266.9830 -26.56 3073.04 31.61 -0.24
GX_5-1 51584.838 270.2840 -25.08 13796.78 88.80 75.47
GX_5-1 51584.842 270.2840 -25.08 14001.40 57.38 75.47
GX_9+1 51584.861 270.3846 -20.53 6801.37 81.78 88.03
H1743-322 51584.781 266.5700 -32.24 15.77 6.27 33.04
IGR_J17191-2821 51584.836 259.7700 -28.35 5.04 4.22 4.85
IGR_J17331-2406 51584.854 263.2833 -24.11 -9.38 6.22 51.96
IGR_J17375-3022 51584.804 264.3946 -30.38 6.50 7.07 33.39
IGR_J17497-2821 51584.828 267.4041 -28.36 6.22 22.04 78.01
IGR_J17511-3057 51584.787 267.7875 -30.96 -72.22 25.90 356.08
IGR_J17586-2129 51584.859 269.6440 -21.39 12.94 4.78 35.16
KS_1731-260 51584.843 263.5539 -26.09 81.83 4.76 8.98
KS_1732-273 51584.836 263.9958 -27.44 -2.26 4.13 41.63
KS_1741-293 51584.818 266.2042 -29.35 36.08 67.91 413.88
MXB_1730-33 51584.779 263.3498 -33.39 68.41 8.79 324.70
OPH_CLU 51584.858 258.1580 -23.39 482.90 14.45 3.04
RXJ1709.5-263 51584.847 257.3760 -26.66 0.89 0.53 3.10
RXS_J172006.1 51584.807 260.0254 -31.28 14.85 2.63 8.65
RXS_J172525.5 51584.783 261.3563 -32.95 18.87 5.41 15.40
RXS_J173251.1 51584.772 263.2129 -34.79 18.25 4.37 43.82
RXS_J175428.3 51584.836 268.6179 -26.34 10.18 3.99 33.59
RXS_J180326.2 51584.839 270.8417 -25.27 -8.06 14.08 5879.41
RXS_J180824.5 51584.849 272.1021 -23.15 13.31 2.89 13.77
R_1832-330 51584.762 278.9317 -32.99 81.70 1.17 3.03
SAXJ1747.0-2853 51584.827 266.7879 -28.88 149.75 58.09 191.07
SAXJ1750.8-2900 51584.819 267.6000 -29.03 17.44 7.54 60.27
SAXJ1753.5-2349 51584.850 268.3917 -23.82 5.63 3.63 16.98
SAXJ1802.7-2017 51584.861 270.6663 -20.29 120.75 123.43 4275.98
SAXJ1805.5-2031 51584.861 271.3917 -20.51 -19.77 9.57 391.04
SAXJ1806.5-2215 51584.855 271.6417 -22.25 5.30 2.68 20.81
SAXJ1808.4-3658 51584.756 272.1208 -36.98 2.83 0.68 3.07
SAXJ1808.4-365P 51584.762 271.1200 -35.50 0.78 2.51 3.32
SAXJ1810.8-2609 51584.833 272.6850 -26.15 3.67 2.37 8.56
SGR_1806-20 51584.861 272.1642 -20.41 8.21 5.07 24.55
SGR_A 51584.827 266.4000 -29.00 242.45 75.41 186.64
SLX_1735-269 51584.837 264.5647 -27.00 100.03 4.96 14.28
SLX_1737-282 51584.830 265.2360 -28.31 24.08 10.89 45.28
SLX_1744-300 51584.801 266.8580 -30.04 232.07 13.99 79.49
SLX_1746-331 51584.777 267.4608 -33.20 4.48 4.06 14.11
SW_J1729.9-3437 51584.773 262.5375 -34.61 -0.60 4.92 105.90
SW_J1756.9-2508 51584.842 269.2380 -25.11 -13.41 7.30 694.45
TERZAN_2 51584.807 261.8880 -30.80 292.84 5.96 13.93
WGAJ1715.3-2635 51584.846 258.8370 -26.60 -0.98 1.71 3.30
XTE_J1710-281 51584.836 257.5500 -28.12 20.61 0.80 3.28
XTE_J1710-281P 51584.831 258.5500 -28.91 15.09 8.00 3.93
XTE_J1719-291 51584.829 259.8890 -29.06 0.83 3.68 6.63
XTE_J1719-356 51584.769 259.9700 -35.68 1.13 1.15 16.61
XTE_J1720-318 51584.798 259.9961 -31.75 -0.40 5.49 16.90
XTE_J1723-376 51584.760 260.9000 -37.65 -0.50 0.70 15.92
XTE_J1726-283 51584.834 261.6570 -28.30 8.66 7.68 8.13
XTE_J1728-295 51584.828 262.1570 -29.52 1.60 2.97 12.24
XTE_J1734-234 51584.857 263.5280 -23.36 2.19 2.94 3.18
XTE_J1737-376 51584.758 264.4950 -37.77 -4.59 3.16 7.55
XTE_J1739-285 51584.829 264.9790 -28.48 33.17 11.22 41.16
XTE_J1739-302 51584.806 264.7500 -30.27 9.88 8.03 35.99
XTE_J1743-363 51584.763 265.7415 -36.33 22.30 3.35 8.01
XTE_J1744-230 51584.856 266.0350 -23.12 22.24 3.25 9.04
XTE_J1747-274 51584.834 266.9095 -27.44 -6.38 13.04 332.97
XTE_J1748-288 51584.828 267.0210 -28.47 13.43 44.09 157.63
XTE_J1751-305 51584.788 267.8062 -30.62 29.51 14.29 107.44
XTE_J1752-223 51584.857 268.0440 -22.32 1.83 3.87 12.42
XTE_J1752-280 51584.828 268.2000 -28.00 19.36 6.99 24.84
XTE_J1755-312 51584.784 268.7820 -31.16 17.50 4.26 33.69
XTE_J1756-342 51584.770 269.0228 -34.21 2.32 2.65 5.66
XTE_J1757-306 51584.786 269.4130 -30.66 12.85 4.42 14.97
XTE_J1759-220 51584.857 269.9404 -22.03 -12.33 4.26 22.99
XTE_J1805-295 51584.789 271.4045 -29.52 6.11 4.67 4.67
XTE_J1807-294 51584.790 271.7441 -29.40 -4.07 4.39 10.90
XTE_J1812-230 51584.848 273.2000 -23.00 7.55 2.34 10.76
XTE_J1814-338 51584.766 273.4126 -33.77 -1.66 2.59 3.14
XTE_J1817-330 51584.769 274.4250 -33.02 0.58 1.98 3.09
XTE_J1818-245 51584.834 274.6050 -24.54 1.15 2.02 6.20
XTE_J1819-254 51584.833 274.8300 -25.41 6.38 0.69 4.87
XTE_J1819-254P 51584.831 273.8300 -26.41 13.25 6.43 5.62

Scan Light Curve

Light Curve - Day 2231r - Part 1

Legend
--------------------------
 12 - EXO 1722-363    
 18 - 4U 1728-34      
 20 - RXS J173251.1   
 35 - XTE J1743-363   
 55 - A1744-361       
 59 - SLX 1746-331    
 61 - 4U 1746-371     
 72 - XTE J1756-342   
 88 - SAXJ1808.4-3658 
103 - 4U 1820-30      
105 - R 1832-330      
Light Curve - Day 2231r - Part 2

Legend
--------------------------
  4 - 4U 1711-34      
 10 - RXS J172006.1   
 13 - RXS J172525.5   
 15 - TERZAN 2        
 18 - 4U 1728-34      
 22 - MXB 1730-33     
 28 - IGR J17375-3022 
 31 - XTE J1739-302   
 36 - 1E1740.7-2942   
 38 - KS 1741-293     
 40 - EXO 1742-326    
 42 - 2S1742-294      
 45 - H1743-322       
 48 - SLX 1744-300    
 59 - SLX 1746-331    
 60 - 2E1746.7-3225   
 63 - GRS 1747-312    
 64 - GRS 1747-312B   
 65 - XTE J1751-305   
 71 - XTE J1755-312   
 74 - XTE J1757-306   
 83 - XTE J1805-295   
103 - 4U 1820-30      
195 - 4U 1820-30      
Light Curve - Day 2231r - Part 3

Legend
--------------------------
  1 - XTE J1710-281   
  2 - XTE J1710-281P  
  6 - IGR J17191-2821 
 10 - RXS J172006.1   
 14 - XTE J1726-283   
 15 - TERZAN 2        
 16 - XTE J1728-295   
 25 - KS 1731-260     
 27 - GRS 1734-292    
 28 - IGR J17375-3022 
 30 - SLX 1735-269    
 31 - XTE J1739-302   
 32 - XTE J1739-285   
 33 - SLX 1737-282    
 36 - 1E1740.7-2942   
 38 - KS 1741-293     
 41 - SGR A           
 42 - 2S1742-294      
 43 - GCRT J1746-2757 
 46 - SAXJ1747.0-2853 
 48 - SLX 1744-300    
 51 - GX 3+1          
 54 - XTE J1748-288   
 58 - IGR J17497-2821 
 62 - SAXJ1750.8-2900 
 68 - XTE J1752-280   
 70 - RXS J175428.3   
 77 - GX 5-1          
 78 - GRS 1758-258    
 86 - 2S1803-245      
 93 - SAXJ1810.8-2609 
100 - XTE J1818-245   
101 - XTE J1819-254   
102 - XTE J1819-254P  
104 - GS 1826-238     
193 - GX 3+1          
194 - GX 5-1          
Light Curve - Day 2231r - Part 4

Legend
--------------------------
  3 - OPH CLU         
 19 - GX 1+4          
 24 - XTE J1734-234   
 25 - KS 1731-260     
 37 - XTE J1744-230   
 67 - XTE J1752-223   
 69 - SAXJ1753.5-2349 
 75 - IGR J17586-2129 
 79 - GX 9+1          
 80 - SAXJ1802.7-2017 
 85 - SAXJ1806.5-2215 
 87 - RXS J180824.5   
 90 - SGR 1806-20     
 95 - XTE J1812-230   
150 - G11.2-0.3       
191 - GX 1+4          
192 - GX 1+4          
194 - GX 5-1          

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Generated automatically on Fri Mar 18 23:04:40 2011 by Craig Markwardt