THE INTERPLANETARY NETWORK SUPPLEMENT TO THE BURST AND TRANSIENT SOURCE EXPERIMENT 5B CATALOG OF COSMIC GAMMA-RAY BURSTS

This paper presents the latest in a series of catalogs of gamma-ray burst (GRB) localizations obtained by arrival time analysis, or "triangulation" between the spacecraft in the 3rd Interplanetary Network (IPN; Table 1). Three of these catalogs (Hurley et al. 1999a, 1999b, 2005) were supplements to the Burst and Transient Source Experiment (BATSE) 3B and 4Br burst catalogs (Meegan et al. 1996; Paciesas et al. 1999) and to the catalogs of untriggered bursts published by Kommers et al. (2000) and Stern et al. (2000). In the present paper, we complete the BATSE triggered event catalog supplements with the data on 343 bursts which occurred between the end of the 4Br catalog (trigger 5586 on 1996 August 29) and the end of the Compton Gamma-Ray Observatory (CGRO) mission (corresponding to trigger 8121 on 2000 May 26). The BATSE data on these events will appear in M. S. Briggs et al. (2011, in preparation). As none of the information in the 3B or 4Br supplements has changed, we do not include any of the detailed data on those bursts in this catalog.

With one exception, which we discuss below (the addition of the Near Earth Asteroid Rendezvous (NEAR) spacecraft to the IPN), these did not change from the 3B and 4Br catalogs. We review each briefly, but refer the reader to Hurley et al. (1999a, 1999b) for more detailed descriptions.

The Ulysses GRB detector (Hurley et al. 1992) consisted of two 3 mm thick hemispherical CsI scintillators with a projected area of about 20 cm² in any direction. The detector was mounted on a magnetometer boom far from the body of the spacecraft and had a practically unobstructed view of the full sky. During the period covered by this catalog, the Ulysses–Earth distance varied between about 1500 and 3100 lt-s. BATSE consisted of eight detector modules situated at the corners of the CGRO spacecraft. Each contained a Large Area Detector (LAD), consisting of a 50.8 cm diameter by 1.27 cm thick NaI scintillator (Meegan et al. 1996).

The NEAR mission was launched in 1996 February. Its orbit included an Earth flyby in 1998 January and an unsuccessful first attempt to enter into orbit around the asteroid Eros in 1998 December. The spacecraft finally went into Eros orbit in 2000 February. The mission carried a gamma-ray spectrometer for the study of the surface composition of Eros (Goldsten et al. 1997; McClanahan et al. 1999; Trombka et al. 1999). Its bismuth germanate anticoincidence shield was a right circular cylinder 8.9 cm in diameter by 14 cm long. Although it was not specifically designed as a GRB detector, an in-flight modification to the on-board software allowed the shield to record the time histories of bursts with 1 s time resolution in a single energy channel (∼0.15–10 MeV), and the first GRB was detected on 1997 September 2. During the period covered by this catalog, the NEAR-Earth distance varied between 0.03 and 1300 lt-s, approximately.

Every cosmic burst detected by BATSE in triggered mode was systematically searched for in the Ulysses and NEAR data by using the approximate arrival direction from BATSE and the positions of the Ulysses and NEAR spacecraft to calculate a window of possible arrival times at these spacecraft. Typical window lengths were 300–500 s, and the data were plotted and searched both by eye and software for a count rate increase corresponding to the BATSE event.

The triangulation technique is illustrated in Figure 1. When a GRB arrives at two spacecraft with a delay δT, it may be localized to an annulus whose half-angle θ with respect to the vector joining the two spacecraft is given by

$$\begin{equation} \cos \theta =\frac{c \delta T}{D}, \end{equation} \tag{ 1 }$$

where c is the speed of light and D is the distance between the two spacecraft. (This assumes that the burst is a plane wave, i.e., that its distance is much greater than D.) The annulus width dθ, and thus one dimension of the resulting error box, is

$$\begin{equation} d \theta =c \sigma (\delta T)/D\sin \theta, \end{equation} \tag{ 2 }$$

where σ(δT) is the uncertainty in the time delay. The radius of each annulus and its right ascension and declination are calculated in a heliocentric (i.e., aberration-corrected) frame. These annuli are given in Table 2, and an example is shown in Figure 2. In general, the annuli obtained by triangulations are small circles on the celestial sphere, so their curvature, even across a relatively small BATSE error circle, is not always negligible, and a simple, four-sided error box cannot be defined. An extreme example is shown in Figure 3. For this reason, we do not cite the intersection points of the annuli with the error circles. A prescription for deriving these points, however, may be found in Hurley et al. (1999a).

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When three experiments (Ulysses, NEAR, and BATSE) observe a burst, the result is two annuli which generally intersect to define two widely separated error boxes. The BATSE error circle is used to distinguish the correct one. An example is shown in Figure 4.

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A number of degenerate cases can occur when there is a three-experiment detection. First, the annuli can intersect at grazing incidence. Geometrically, this corresponds to the case θ₁ + θ₂ ≈ ∠NBU, where θ₁ is the radius of the first IPN annulus in Equation (1), θ₂ is the radius of the second IPN annulus in Equation (1), and ∠NBU is the NEAR–BATSE–Ulysses angle. When this occurs, the annuli may cross at one, two, three, or four points, often defining a long, narrow error box. An example is shown in Figure 5. Second, if the three spacecraft are approximately aligned, i.e., ∠NBU ≈ 0°, one annulus can be completely contained within the other, i.e., θ₁ ≈ θ₂. Because NEAR and CGRO are in the ecliptic plane, and Ulysses is outside it, this case did not occur for any of the bursts discussed here. Third, if the burst arrives along the line joining two spacecraft, then θ ≈ 0° and sin θ ≈ 0, and the annulus has a small radius but a very large width dθ. In these cases, the width of the annulus can exceed its radius, and the annulus becomes a circle; the second annulus intersects it to define a single error box. Finally, if the annuli intersect almost at grazing incidence, the two intersections are close to one another and may both be located within the BATSE 1σ error circle, making it impossible to determine the correct location. An example is shown in Figure 6. A total of 11 events in this catalog produced degenerate localizations.

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The main selection criterion for a burst in this catalog is that it must have been detected by BATSE and/or Ulysses and/or NEAR. As in previous catalogs, we sometimes utilized various criteria to determine whether a burst was actually detected, such as the goodness of fit between the light curves, as judged by the correlation coefficient and a chi-squared statistic, as well as the ratio of the observed Ulysses counts to the BATSE counts. There is, however, a difference in the triangulation technique between the events presented here and those presented in previous catalogs. GRB time histories are energy-dependent. A time history taken in the 25–150 keV Ulysses energy range may differ from that taken in the NEAR ∼ 150–10,000 keV range. The magnitude of this difference varies considerably from event to event and can easily be judged in, say, the χ² technique (Hurley et al. 1999a), where the goodness of fit is reflected in the value of χ² per degree of freedom. When the match between two time histories is poor, the estimate of the statistical uncertainty in the time difference may become unreliable. This, in turn, renders the annulus width estimates, and hence the confidence value for the error box suspect. We have been able to avoid this problem here by comparing time histories in the same or very similar energy ranges. Thus the Ulysses 25–150 keV time histories were compared to 25–100 keV BATSE time histories, while the NEAR time histories were compared to the >100 keV BATSE time histories.

There are 1068 bursts in the 5B catalog (M. S. Briggs et al. 2011, in preparation). Of these, 343 were observed by Ulysses and/or NEAR, and in some cases, other spacecraft as well.¹³ Ninety-one bursts were detected by all three spacecraft. Thus the IPN observed approximately one out of every 3.1 BATSE bursts over this period. The fraction of BATSE bursts observed by the IPN is slightly higher in this catalog than in previous ones due to the addition of the NEAR spacecraft. The combination of the 3B and 4Br supplements and the present catalog contains 708 bursts.

The histogram of Figure 7 shows the distribution of annulus half-widths (i.e., δR_IPN in Table 2) for the 343 bursts localized. The smallest is about 11'', the largest is 21°, and the average is 96. (The largest annulus width occurred for BATSE 6580 on 1998 January 25, when the NEAR spacecraft passed the Earth at a distance of only 0.478 lt-s on its way to encounter with Eros.)

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Of the 343 bursts, 253 were localized to single annuli by the IPN, and another 11, although detected by all three spacecraft, were degenerate localizations which prevented the derivation of a useful error box. These may be treated as single annuli. Considering these 264 annuli, 185, or 70%, intersect the BATSE 1σ error circles, whose radii are defined by $r_{1\sigma }=\sqrt{\vphantom{A^A}\smash{\hbox{${\sigma _{{\rm stat}}^2 + \sigma _{{\rm sys}}^2}$}}}$, where σ_sys is the systematic error, 16, and σ_stat is the statistical error. The combined IPN/BATSE error regions are an average factor of ∼20 smaller than the BATSE error circles. 70% is somewhat less than the percentage which would be predicted purely on the basis of statistics (87%). A detailed comparison of the IPN and BATSE localizations results in several more complicated BATSE error models that render the BATSE and IPN localizations consistent (Briggs et al. 1999).

Although 91 bursts were observed by Ulysses, NEAR, and BATSE, 11 were degenerate, leaving 80 with well-defined IPN error boxes. The smallest has an area of approximately 0.7 arcmin², and the largest, 48,000 arcmin². The average area is 1100 arcmin², and the average ratio of the area of the BATSE error circle to the area of the IPN error box is ∼87. Forty-six, or 58%, of these error boxes are partially or completely contained within their corresponding BATSE error circles. A histogram of IPN error box sizes is shown in Figure 8. The centers and corners of the 80 error boxes are given in Table 3. However, in some cases, the curvature of the annuli may render a simple, four-corner error box description inaccurate.

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Table 3. IPN Error Boxes

Date	NB	α2000	δ2000
970912	6380	11h57m4930	−22°39'1650
		11h53m2931	−23°6'4607
		12h2m279	−22°18'3245
		11h53m3651	−22°58'865
		12h2m1011	−22°9'3702
970919	6389	9h14m5183	−6°29'5075
		9h15m1279	−6°37'3439
		9h14m2588	−6°25'055
		9h15m1784	−6°34'3926
		9h14m3093	−6°22'482
970925	6397	21h54m3688	−9°49'1261
		21h54m4082	−9°39'1438
		21h54m2046	−9°50'3275
		21h54m5331	−9°47'5303
		21h54m3309	−9°59'1815
970930	6404	19h13m2533	−81°25'1215
		19h15m131	−81°31'3865
		19h11m4557	−81°18'5602
		19h15m763	−81°31'2639
		19h11m5182	−81°18'4394
971006	6414	16h44m3341	53°51'4197
		16h45m879	54°14'853
		16h44m4278	53°29'2313
		16h44m2360	54°14'071
		16h43m5837	53°29'1457
971029	6454	4h25m962	−45°12'2615
		4h26m2000	−46°30'5065
		4h26m649	−43°59'2153
		4h24m718	−46°25'2073
		4h23m5895	−43°53'4313
101197	6472	16h9m1198	49°56'1430
		16h9m284	50°18'3094
		16h9m2845	49°34'2368
		16h8m5492	50°18'347
		16h9m2064	49°33'5621
971127	6504	15h36m5965	33°9'4851
		15h37m1183	33°51'4230
		15h37m3908	32°34'4644
		15h36m1877	33°44'4080
		15h36m4643	32°27'3775
971207	6525	8h35m4812	−4°26'2759
		8h36m819	−4°41'5990
		8h35m2231	−4°13'631
		8h36m1409	−4°39'4393
		8h35m2823	−4°10'4866
971208	6526	2h8m4629	71°55'1781
		23h50m1751	76°24'2859
		3h23m5443	64°23'5074
		23h50m5285	75°44'5281
		3h19m3508	63°55'2758
971209	6527	16h9m1134	60°26'1305
		16h8m5706	60°36'3729
		16h9m2914	60°15'5941
		16h8m5325	60°36'2628
		16h9m2537	60°15'4845
971218	6535	2h48m5476	61°41'3598
		2h47m1997	61°56'1976
		2h50m3752	61°28'2424
		2h47m1050	61°54'4212
		2h50m2804	61°26'4720
980103	6557	16h9m3014	−75°40'344
		15h23m1942	−80°27'1851
		16h30m3389	−70°32'5872
		15h27m5111	−80°34'4425
		16h33m762	−70°37'546
980105	6560	2h26m1869	50°17'1093
		2h23m1600	50°48'5429
		2h29m1837	49°45'1894
		2h23m1502	50°48'3122
		2h29m1738	49°44'5577
980113	6570	17h28m4734	−25°29'3845
		17h21m2114	−35°27'3992
		17h28m3122	−25°46'5185
		17h21m2911	−35°27'4738
		17h28m3866	−25°46'4089
980125	6581	21h16m4814	24°11'5431
		21h8m4440	22°32'1506
		21h25m4262	25°49'249
		21h8m4701	22°32'497
		21h25m4553	25°48'5175
980203	6587	0h20m2601	−16°29'2613
		0h16m4061	−19°44'5325
		0h21m5106	−13°14'1119
		0h16m3529	−19°44'5370
		0h21m4625	−13°14'1210
980829	7030	16h6m1608	−56°14'2381
		16h5m5134	−56°53'4628
		16h7m1125	−55°34'4332
		16h5m1899	−56°53'5976
		16h6m3997	−55°35'013
981011	7150	3h29m1830	−64°26'1152
		3h31m677	−64°3'3119
		3h28m2358	−64°52'637
		3h30m1107	−64°0'1456
		3h27m2656	−64°48'4585
981015	7156	19h55m1817	−79°48'5737
		19h55m2804	−79°59'1522
		19h50m5657	−79°46'4051
		19h59m4148	−79°51'050
		19h55m857	−79°38'3916
981021	7170	23h52m3310	0°13'5500
		23h52m4198	0°16'3534
		23h52m4002	0°20'735
		23h52m2605	0°7'3802
		23h52m2420	0°11'1393
981022	7172	0h52m4426	48°43'1459
		0h52m3276	48°45'1996
		0h52m5454	48°42'4384
		0h52m3399	48°43'4523
		0h52m5576	48°41'898
981031	7185	18h21m3975	−26°35'4868
		18h23m4179	−28°48'257
		18h19m4428	−24°20'1079
		18h23m4404	−28°47'5892
		18h19m4659	−24°20'1856
981121	7219	0h50m4719	42°39'1137
		0h44m2843	43°45'2568
		0h55m4482	42°11'2173
		0h45m4958	43°4'1649
		0h57m458	41°26'1481
981125	7228	17h16m826	31°22'4736
		17h15m4883	31°28'2326
		17h15m5349	31°12'2444
		17h16m2310	31°33'946
		17h16m2766	31°17'1131
981130	7240	23h15m1291	−12°38'2593
		23h15m1782	−12°39'3609
		23h15m1094	−12°39'4243
		23h15m1489	−12°37'941
		23h15m801	−12°37'1571
981203	7248	19h14m1869	−26°02'5533
		19h14m2833	−26°14'733
		19h13m4184	−25°45'4013
		19h14m5401	−26°18'5936
		19h14m863	−25°51'2324
981211	7255	22h17m3151	−8°14'5844
		22h17m5509	−8°24'2759
		22h17m2784	−8°18'2396
		22h17m3514	−8°11'3235
		22h17m731	−8°5'1299
990206	7374	16h23m1008	7°9'1842
		16h23m663	7°31'3873
		16h23m2507	7°6'5493
		16h22m5508	7°11'4183
		16h23m1353	6°46'5468
990216	7390	18h10m4000	−40°15'240
		18h10m1397	−40°19'794
		18h12m3485	−41°20'718
		18h8m5348	−39°11'1900
		18h11m600	−40°10'5674
990319	7484	19h10m2035	31°48'5308
		19h10m1035	31°49'4486
		19h10m4851	32°12'3590
		19h9m5233	31°24'3596
		19h10m3034	31°48'127
990323	7491	22h26m1799	−77°10'525
		22h26m907	−77°10'2091
		22h26m4230	−77°10'944
		22h25m5369	−77°10'091
		22h26m2691	−77°9'4956
990331	7498	23h36m2609	22°15'2594
		23h36m311	23°6'876
		23h38m5879	21°40'5155
		23h33m4799	22°49'480
		23h36m4461	21°23'4395
990403	7503	20h2m1239	−3°46'1530
		20h1m4050	−3°33'4187
		20h2m5843	−4°16'5969
		20h1m2569	−3°13'4391
		20h2m4414	−3°58'2799
990424	7527	5h30m1547	−64°57'611
		5h30m396	−64°56'1348
		5h30m1739	−64°59'5107
		5h30m1356	−64°54'2112
		5h30m2699	−64°57'5869
990424	7529	5h39m1139	37°40'3229
		5h39m1841	37°47'092
		5h39m296	37°40'2367
		5h39m1983	37°40'4086
		5h39m437	37°34'240
990425	7530	22h9m4206	−5°24'2037
		22h9m3681	−5°26'1266
		22h9m5082	−5°24'2574
		22h9m3328	−5°24'1477
		22h9m4729	−5°22'2782
990427	7534	23h30m5870	−18°37'3824
		23h31m134	−18°39'5737
		23h31m902	−18°37'5565
		23h30m4838	−18°37'2071
		23h30m5606	−18°35'1904
990506	7549	11h54m4863	−26°42'1417
		11h54m4172	−26°47'1723
		11h54m5808	−26°39'2722
		11h54m3917	−26°45'044
		11h54m5555	−26°37'910
990510	7560	13h38m1045	−80°29'4154
		13h37m5621	−80°31'2317
		13h38m4064	−80°28'320
		13h37m4008	−80°31'1971
		13h38m2460	−80°27'5988
990516	7569	16h29m4930	2°43'2446
		16h29m4599	2°48'3142
		16h29m5046	2°38'5988
		16h29m4815	2°47'4836
		16h29m5262	2°38'1646
990518	7575	23h9m1499	−36°55'5869
		23h9m778	−36°59'308
		23h9m3577	−36°55'4514
		23h8m5420	−36°56'1184
		23h9m2219	−36°52'5419
990522	7578	2h35m690	24°45'1036
		2h35m998	25°4'2895
		2h35m1029	24°25'2182
		2h35m334	25°4'4912
		2h35m369	24°25'4695
990527	7586	22h44m1261	−18°39'3068
		22h44m1420	−18°42'3658
		22h44m2366	−18°41'747
		22h44m155	−18°37'5378
		22h44m1101	−18°36'2471
990531	7592	3h18m3610	36°4'5641
		3h18m3774	36°7'2487
		3h18m3656	36°2'2004
		3h18m3565	36°7'3272
		3h18m3447	36°2'2794
990707	7638	4h59m670	22°9'4056
		4h56m1664	19°50'4825
		5h1m3138	24°37'2949
		4h56m5778	19°46'083
		5h2m1109	24°30'3177
990712	7647	8h13m5106	6°40'3183
		8h12m4885	6°14'5799
		8h14m5524	7°7'1260
		8h13m399	6°20'646
		8h15m2507	7°17'4344
Or		8h21m2520	9°26'2657
		8h22m3832	9°50'1596
		8h20m871	9°1'4549
		8h22m2458	9°44'5210
		8h19m4029	8°50'5926
990712	7648	18h50m1452	11°12'2996
		18h49m3710	11°26'5982
		18h49m3821	11°5'4690
		18h50m5091	11°19'1180
		18h50m5214	10°57'5415
990714	7652	15h33m1474	21°8'4718
		15h33m2057	21°12'736
		15h33m2382	21°7'4530
		15h33m565	21°9'4901
		15h33m892	21°5'2688
990728	7678	14h8m523	−57°37'3976
		14h7m3648	−57°49'905
		14h8m3421	−57°27'2210
		14h7m3612	−57°47'5142
		14h8m3385	−57°26'305
990909	7760	1h24m4681	−29°13'2645
		1h24m5887	−29°10'5271
		1h24m3487	−29°17'2048
		1h24m5873	−29°9'3223
		1h24m3474	−29°16'001
990915	7766	7h9m3467	72°56'1615
		7h11m4643	73°6'1597
		7h9m1924	72°54'1339
		7h9m5008	72°58'1842
		7h7m2198	72°45'5401
991004	7788	13h59m337	−17°58'4091
		13h59m1031	−17°59'4523
		13h59m619	−17°52'637
		13h59m050	−18°5'1566
		13h58m5644	−17°57'3662
991025	7822	17h28m5529	43°59'780
		17h30m1993	42°23'475
		17h27m5840	44°49'5026
		17h29m4637	43°14'2699
		17h26m5946	46°9'1681
991104	7840	21h22m5930	−31°42'920
		21h22m4383	−31°45'520
		21h23m5641	−31°52'3260
		21h22m253	−31°31'4225
		21h23m1475	−31°39'1303
991106	7842	2h48m4024	59°19'3950
		2h48m3366	59°37'4775
		2h50m2007	58°50'5440
		2h46m5590	59°48'1818
		2h48m4610	59°1'3290
991113	7854	0h15m1302	34°19'5703
		0h15m2174	34°23'2287
		0h15m3223	34°19'842
		0h14m5380	34°20'4495
		0h15m431	34°16'3073
991115	7858	19h37m4837	40°12'2624
		19h37m2720	39°46'342
		19h37m5921	41°13'3261
		19h37m4176	39°4'1979
		19h38m1045	40°37'4001
991127	7884	1h7m5057	−10°41'2740
		1h7m4092	−10°43'4687
		1h8m423	−10°39'2432
		1h7m3690	−10°43'3018
		1h8m020	−10°39'778
991216	7906	5h9m3617	11°19'4569
		5h9m4457	11°22'2412
		5h9m1836	11°11'3903
		5h9m5356	11°27'4196
		5h9m2771	11°17'593
991229	7925	22h17m4013	35°01'3596
		22h17m1767	35°14'3315
		22h17m2037	35°21'1617
		22h18m282	34°39'4652
		22h18m374	34°47'4616
000101	7929	20h10m1663	29°09'1830
		20h9m5774	29°17'2098
		20h10m922	29°10'1925
		20h10m2406	29°8'1711
		20h10m3585	29°1'778
000109	7941	16h31m4624	−30°28'614
		16h33m3778	−31°3'2975
		16h29m5475	−29°40'5486
		16h33m2806	−31°11'3668
		16h29m4927	−29°50'3122
000123	7965	21h23m008	12°59'4408
		21h24m1879	12°42'022
		21h22m4130	12°56'129
		21h23m1886	13°3'2702
		21h21m3916	13°18'630
000126	7971	7h45m623	7°45'3993
		7h45m4927	7°56'2630
		7h44m5713	7°46'4392
		7h45m1531	7°44'3589
		7h44m2229	7°34'4023
000131	7975	6h13m3121	−51°57'5788
		6h13m1455	−52°1'5821
		6h13m2413	−51°54'5750
		6h13m3832	−52°0'5820
		6h13m4786	−51°53'5729
000201	7976	9h15m5868	18°10'5724
		9h16m3591	18°18'2002
		9h15m4457	18°14'4114
		9h16m1277	18°7'1321
		9h15m2134	18°3'3221
000301	8005	23h39m2670	75°47'2961
		23h38m2990	75°51'1455
		23h40m453	75°46'5506
		23h38m4884	75°48'356
		23h40m2319	75°43'4253
000307	8022	5h56m1791	7°56'3606
		5h55m5962	7°55'1439
		5h56m2079	7°59'3483
		5h56m1504	7°53'3729
		5h56m3624	7°57'5797
000323	8049	12h51m4081	48°47'1024
		12h52m4621	48°29'4239
		12h50m888	48°50'4544
		12h53m1255	48°43'3126
		12h50m3456	49°4'3837
000324	8050	13h43m3953	−20°2'3098
		13h43m2436	−19°56'616
		13h43m5922	−20°7'001
		13h43m1984	−19°58'221
		13h43m5470	−20°8'5627
000326	8053	22h11m2082	−26° − 9' − 3991
		22h11m4235	−26°8'5235
		22h11m013	−26°11'239
		22h11m4149	−26°8'1709
		22h10m5928	−26°10'2712
000402	8063	22h48m3468	6°27'2016
		22h49m1281	6°25'3297
		22h48m3304	6°19'2079
		22h48m3628	6°35'1965
		22h47m5646	6°29'754
000408	8069	9h9m945	66°35'1882
		9h10m078	66°34'3988
		9h8m3336	66°35'1070
		9h9m4543	66°35'2653
		9h8m1780	66°35'5694
000415	8075	8h59m2563	70°2'3058
		9h20m3444	69°46'1873
		8h45m2593	69°57'1809
		9h12m570	70°4'4591
		8h32m5627	70°9'1800
000429	8087	6h33m1934	−4°24'3842
		6h33m128	−4°25'2391
		6h33m2334	−4°21'695
		6h33m1534	−4°28'998
		6h33m3742	−4°23'5299
000508	8098	16h54m2403	−20°25'3094
		16h54m020	−20°26'400
		16h54m3426	−20°33'4443
		16h54m1386	−20°17'1767
		16h54m4786	−20°24'5768
000511	8101	22h21m1104	−37°31'1636
		22h23m5998	−37°29'5808
		22h17m3071	−38°0'4761
		22h24m4179	−37°1'4122
		22h18m2162	−37°32'1694
000519	8111	23h4m3112	1°7'4521
		23h4m5290	1°9'038
		23h4m2448	1°2'2956
		23h4m3774	1°13'104
		23h4m931	1°6'3021
000524	8116	7h33m2709	−40°27'4111
		7h32m5291	−40°33'802
		7h32m1315	−40°15'2378
		7h34m4358	−40°40'125
		7h34m121	−40°22'1358

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