2024RAA....24j4002Z

Query : 2024RAA....24j4002Z

2024RAA....24j4002Z - Research in Astron. and astroph., 24, part no 10, 4002 (2024/October-0)

The In-Flight Realtime Trigger and Localization Software of GECAM.

ZHAO X.-Y., XIONG S.-L., WEN X.-Y., LI X.-Q., CAI C., XIAO S., LUO Q., PENG W.-X., GUO D.-Y., AN Z.-H., GONG K., LIAO J.-Y., ZHANG Y.-Q., HUANG Y., LI L., WEN X., ZHANG F., DUAN J., WANG C.-W., SHI D.-L., ZHANG P., YI Q.-B., LI C.-Y., XU Y.-B., LIANG X.-H., LIU Y.-Q., ZHANG D.-L., SUN X.-L., ZHANG F., CHEN G., WANG H.-Y., YANG S., LIU X.-J., GAO M., LI M.-S., WANG J.-Z., ZHOU X., ZHAO Y., XUE W.-C., ZHENG C., LIU J.-C., HAN X.-B., QI J.-L., HUANG J., ZHANG K.-K., CHEN C., YANG X.-T., HOU D.-J., WANG Y.-S., QIAO R., MA X., LI X.-B., WANG P., SONG X.-Y., SONG L.-M., ZHENG S.-J., LI B., ZHANG H.-M., ZHU Y., CHEN W., HE J.-J., ZHANG Z., HOU J., WANG H.-J., HAO Y.-C., WANG X.-Y., YANG Z.-Y., WEN Z.-L., CHANG Z., DU Y.-Y., GAO R., LAN X.-F., LI Y.-G., LI G., LI X.-F., LU F.-J., LU H., MENG B., SHI F., WANG H., WANG H.-Z., XU Y.-P., YANG J.-W., YANG X.-J., ZHANG S.-N., ZHANG C.-Y., ZHANG C.-M., TANG Z.-C. and CHENG C.

Abstract (from CDS):

Realtime trigger and localization of bursts are the key functions of GECAM, an all-sky gamma-ray monitor launched on 2020 December 10. We developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic Box. This onboard software has the following features: high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation, dedicated localization algorithm optimized for both short and long bursts, and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation system. This paper provides a detailed description of the design and development of the trigger and localization software system for GECAM. It covers the general design, workflow, the main functions, and the algorithms used in the system. The paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube, as well as an overview of the performance for real celestial bursts during its in-orbit operation.

Abstract Copyright: © 2024. National Astronomical Observatories

Journal keyword(s): telescopes - instrumentation: detectors - methods: observational

Simbad objects: 124

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Number of rows : 124
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V635 Cas HXB 01 18 31.9704955824 +63 44 33.072603144 17.05 16.64 15.19 14.34 13.22 B0.2Ve 791 0
2 GRB 220405A gB 01 58 -22.8           ~ 2 0
3 V* BQ Cam HXB 03 34 59.9116110096 +53 10 23.296879776   17.16 15.42 14.26 13.04 O8.5Ve 525 1
4 V* V518 Per HXB 04 21 42.7227473352 +32 54 26.939156184           M4.5V 670 0
5 GRB 210126A gB 04 42.7 -67 56           ~ 6 0
6 GRB 210919A gB 05 21 01.05 +01 18 42.1           ~ 41 0
7 GRB 211105A gB 05 27.7 -57 23           ~ 6 0
8 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
9 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 1045 0
10 V* V1055 Ori LXB 06 17 07.3565603963 +09 08 13.515857360   18.80 18.5     ~ 594 1
11 GRB 220523B gB 06 57.2 +59 43           ~ 4 0
12 GRB 210204A gB 07 48 19.37 +11 24 34.2           ~ 46 0
13 GRB 210520A gB 08 12.0 -69 24           ~ 12 0
14 V* GP Vel HXB 09 02 06.8608812864 -40 33 16.899168060 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1588 0
15 GRB 220623A gB 09 41 34.51 +75 49 15.6           ~ 23 0
16 GRB 220514A gB 09 50 40.1 +13 08 50           ~ 15 0
17 GRB 210317A gB 10 16.9 -64 56           ~ 7 0
18 GRB 211022A gB 10 58 -50.6           ~ 6 0
19 GRB 220310A gB 11 14.4 +23 27           ~ 13 0
20 GRB 210427A gB 11 51.2 -52 52           ~ 11 0
21 V* BP Cru HXB 12 26 37.5605188992 -62 46 13.261044684   12.482 10.803 10.304   B1Ia+ 731 0
22 GRB 220403B gB 12 45 54.35 +89 11 04.7           ~ 21 0
23 GRB 220710A gB 14 46 16.10 +20 39 29.9           ~ 6 0
24 V* BR Cir HXB 15 20 40.8532547060 -57 10 00.206639033   21.4 21.4     B5-A0I 849 1
25 V* V381 Nor HXB 15 50 58.6637920704 -56 28 35.258385000           K3III 1254 0
26 NAME SGR J1555.2-5402 X 15 55 08.556 -54 03 38.74           ~ 35 0
27 V* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0
28 4U 1624-49 LXB 16 28 02.825 -49 11 54.61           ~ 250 0
29 V* V801 Ara LXB 16 40 55.5976953528 -53 45 04.948107156 17.50 18.20 17.5   17.07 ~ 921 0
30 4U 1642-45 LXB 16 45 48.1 -45 36 42           ~ 467 1
31 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
32 V* HZ Her LXB 16 57 49.8110126616 +35 20 32.486555472 11.90 14.89 13.63 13.88   B3/6ep 2172 0
33 V* V821 Ara LXB 17 02 49.3876391280 -48 47 23.087954544         15.322 ~ 2237 0
34 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 851 0
35 V* V1101 Sco LXB 17 05 44.4916006152 -36 25 23.049324480   20.10 18.6     ~ 473 0
36 1RXS J170855.6-440653 LXB 17 08 54.346 -44 06 08.38           ~ 406 1
37 V* V2216 Oph LXB 17 31 44.17 -16 57 40.9 16.40 17.10 16.8     ~ 329 1
38 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
39 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 437 0
40 V* V926 Sco LXB 17 38 58.2384053021 -44 27 00.699118812 16.90 17.70 17.5     ~ 480 0
41 2E 3938 HXB 17 43 54.7 -29 44 44           ~ 693 1
42 SWIFT J174510.8-262411 LXB 17 45 10.849 -26 24 12.60           ~ 78 0
43 X Sgr X-1 LXB 17 47 56.3 -26 33 47           ~ 402 0
44 IGR J17544-2619 HXB 17 54 25.2722906112 -26 19 52.576928292   14.71 12.94 12.10 10.38 O9Ib 207 0
45 4U 1758-25 LXB 18 01 09.7308060816 -25 04 44.120221284     11.08     ~ 705 1
46 2CXO J180112.3-254436 HXB 18 01 12.4783119670 -25 44 35.694663099           AV 417 1
47 X Sgr X-3 LXB 18 01 32.6 -20 31 45           ~ 254 1
48 GRB 210207B gB 18 02 32.33 +53 40 55.8           ~ 24 0
49 V* V5512 Sgr LXB 18 14 31.3 -17 09 23     12.73     K5III 449 0
50 V* NP Ser LXB 18 16 01.7 -14 02 09   18.8       K 683 2
51 GRB 220521A gB 18 20 55.15 +10 22 18.4           ~ 38 0
52 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 1056 1
53 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0
54 V* MM Ser LXB 18 39 57.8 +05 02 13   19.2 19.2     ~ 378 0
55 4U 1901+03 HXB 19 03 39.3926409480 +03 12 15.758070228           B8-9IV 122 0
56 GRB 220511A gB 19 09 43.58 +17 43 47.6           ~ 16 0
57 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
58 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
59 GRB 211229A gB 19 40 11 +23 08.0           ~ 10 0
60 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
61 GRB 211102B gB 20 04 -02.6           ~ 5 0
62 GRB 210822A gB 20 17 44.99 +05 17 00.5           ~ 49 0
63 GRB 211120A gB 20 20.0 +41 25           ~ 9 0
64 V* V2246 Cyg HXB 20 32 15.2749858128 +37 38 14.843024844   22.16 19.41 17.32 15.18 B0Ve 480 0
65 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 2035 2
66 GRB 210619B gB 21 18 52.39 +33 51 00.2           ~ 93 0
67 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1229 1
68 GRB 211106A G 22 54 20.5410 -53 13 50.548           ~ 38 0
69 GRB 220209A gB 23 28.5 +73 07           ~ 12 0
70 GRB 210909B gB 23 54 -74.9           ~ 3 0
71 GRB 210602B gB ~ ~           ~ 3 0
72 GRB 210516A gB ~ ~           ~ 3 0
73 GRB 210511B gB ~ ~           ~ 17 0
74 GRB 210425A gB ~ ~           ~ 3 0
75 GRB 210413A gB ~ ~           ~ 3 0
76 GRB 210409A gB ~ ~           ~ 4 0
77 GRB 210827B gB ~ ~           ~ 6 0
78 GRB 210401A gB ~ ~           ~ 5 0
79 GRB 210925A gB ~ ~           ~ 4 0
80 GRB 210927B gB ~ ~           ~ 5 0
81 GRB 211110A gB ~ ~           ~ 4 0
82 GRB 211204C gB ~ ~           ~ 10 0
83 GRB 211216A gB ~ ~           ~ 8 0
84 GRB 211217A gB ~ ~           ~ 3 0
85 GRB 211231A gB ~ ~           ~ 5 0
86 GRB 220121B gB ~ ~           ~ 2 0
87 GRB 220127A gB ~ ~           ~ 2 0
88 GRB 220131B gB ~ ~           ~ 3 0
89 GRB 220320A gB ~ ~           ~ 5 0
90 GRB 210330A gB ~ ~           ~ 5 0
91 GRB 220426C gB ~ ~           ~ 2 0
92 GRB 210328A gB ~ ~           ~ 5 0
93 GRB 210307B gB ~ ~           ~ 6 0
94 GRB 220606C gB ~ ~           ~ 3 0
95 GRB 220613A gB ~ ~           ~ 3 0
96 GRB 210228A gB ~ ~           ~ 3 0
97 GRB 220624B gB ~ ~           ~ 2 0
98 GRB 220713A gB ~ ~           ~ 2 0
99 GRB 210124A gB ~ ~           ~ 2 0
100 GRB 210121A gB ~ ~           ~ 14 0
101 GRB 210926A gB ~ ~           ~ 5 0
102 GRB 210120A gB ~ ~           ~ 11 0
103 GRB 210923B gB ~ ~           ~ 2 0
104 GRB 211109C gB ~ ~           ~ 3 0
105 GRB 211211B gB ~ ~           ~ 6 0
106 GRB 211216B gB ~ ~           ~ 5 0
107 GRB 211223A gB ~ ~           ~ 4 0
108 GRB 211229B gB ~ ~           ~ 8 0
109 GRB 220104A gB ~ ~           ~ 5 0
110 GRB 220124A gB ~ ~           ~ 5 0
111 GRB 220130A gB ~ ~           ~ 5 0
112 GRB 220203A gB ~ ~           ~ 5 0
113 GRB 220401B gB ~ ~           ~ 3 0
114 GRB 220603A gB ~ ~           ~ 2 0
115 GRB 220609B gB ~ ~           ~ 5 0
116 GRB 220620A gB ~ ~           ~ 3 0
117 GRB 220623B gB ~ ~           ~ 4 0
118 GRB 220705A gB ~ ~           ~ 2 0
119 GRB 220711C gB ~ ~           ~ 5 0
120 GRB 220715A gB ~ ~           ~ 4 0
121 GRB 210719A gB ~ ~           ~ 3 0
122 GRB 210627B gB ~ ~           ~ 6 0
123 GRB 210622B gB ~ ~           ~ 5 0
124 GRB 210606B gB ~ ~           ~ 12 0

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