SGR1935+2154
Contents
General Information
- Name of the source: SGR 1935+2154
- Brief description of the source:
- Object type : Soft Gamma Repeater, Galactic Magnetar
- Other relevant information: Its simultaneous X-ray bursts and Fast radio Bursts on April 28th, 2020 suggest that FRB can be created by magnetars.
- RA: 19 35 00.0 (hh mm ss), Dec: +21 53 59.1 (dd mm ss)
- RA, Dec in deg (ICRS): 293.75, 21.90
- Galactic Coordinates l=57.26, b=0.81
People involved
- Gabriele Panebianco (gabriele.panebianco@inaf.it)
- Rubén López-Coto (rlopezcoto@iaa.es)
- Andrea Bulgarelli
Presentations
- 2023-06-05 LST Analysis Call (reco meeting): link to pdf
- 2023-06-19 LST General Meeting: link to pdf
- 2023-07-21 LST Galactic Group Meeting: link to pdf
- 2023-11-08 LST General Meeting: link to pdf
- 2024-01-15 Contributed talk at VHEGAM Conference: link to SAPO XWiki
- 2024-02-19 LST Analysis Call (reco meeting): link to pdf
- 2024-03-22 LST Galactic Group Meeting: link to pdf
- 2024-04-15 Contributed poster at CTA Symposium: link to XWiki
Data-taking Information
SGR 1935+2154 was observed during July 2021, September 2021, June 2022, October 2022 as follow up to external science alerts. SGR 1935+2154 was observed for a total of 37.7 hours over 118 runs in 17 nights.
Observations are quasi-simultaneous to other facilities observations, both at VHE and MWL.
Most observations are in Wobble mode, though some runs were taken in ON mode but without OFF observations (this is the case for all October 2022 runs and 4 July 2021 runs).
| Run Number | Night | Run Start Time [UTC] | Run Elapsed Time [s] | Source Offset [deg] | Mean pointing azimuth [deg] | Mean pointing zenith [deg] | analysed | mode |
|---|---|---|---|---|---|---|---|---|
| 5154 | 20210706 | 2021-07-06 21:35:40.008366 | 967.415 | 0.348 | 81.331 | 56.930 | False | wobble |
| 5155 | 20210706 | 2021-07-06 21:55:39.538852 | 1016.190 | 0.451 | 83.681 | 51.829 | False | wobble |
| 5156 | 20210706 | 2021-07-06 22:18:14.314086 | 1053.514 | 0.372 | 85.327 | 47.133 | True | wobble |
| 5157 | 20210706 | 2021-07-06 22:41:17.329760 | 1205.443 | 0.434 | 88.929 | 42.344 | True | wobble |
| 5158 | 20210706 | 2021-07-06 23:03:40.273986 | 1205.356 | 0.357 | 90.827 | 37.672 | True | wobble |
| 5161 | 20210706 | 2021-07-06 23:38:21.458475 | 1206.221 | 0.443 | 96.226 | 29.316 | True | wobble |
| 5162 | 20210706 | 2021-07-07 00:00:21.764677 | 1205.398 | 0.442 | 100.261 | 24.532 | True | wobble |
| 5163 | 20210706 | 2021-07-07 00:25:00.965802 | 1443.322 | 0.368 | 104.802 | 19.462 | True | wobble |
| 5164 | 20210706 | 2021-07-07 00:49:25.963768 | 1145.974 | 0.436 | 116.293 | 14.803 | True | wobble |
| 5165 | 20210706 | 2021-07-07 01:10:44.258733 | 1203.290 | 0.365 | 127.337 | 10.904 | True | wobble |
| 5166 | 20210706 | 2021-07-07 01:32:50.001943 | 1203.480 | 0.437 | 158.649 | 7.453 | True | wobble |
| 5167 | 20210706 | 2021-07-07 01:54:27.456639 | 1206.198 | 0.367 | 195.814 | 6.820 | True | wobble |
| 5168 | 20210706 | 2021-07-07 02:16:10.395605 | 1205.429 | 0.436 | 224.205 | 9.957 | True | wobble |
| 5169 | 20210706 | 2021-07-07 02:38:19.418482 | 1205.540 | 0.370 | 241.561 | 13.290 | True | wobble |
| 5170 | 20210706 | 2021-07-07 02:59:59.232267 | 1205.947 | 0.432 | 252.307 | 18.372 | True | wobble |
| 5171 | 20210706 | 2021-07-07 03:22:42.369718 | 1203.333 | 0.367 | 258.984 | 22.682 | True | wobble |
| 5175 | 20210706 | 2021-07-07 04:15:42.475526 | 1205.977 | 0.434 | 266.547 | 34.509 | True | wobble |
| 5176 | 20210706 | 2021-07-07 04:35:08.352232 | 905.936 | 0.377 | 269.512 | 38.264 | True | wobble |
| 5192 | 20210707 | 2021-07-08 01:19:53.546984 | 1204.101 | 0.022 | 142.520 | 8.584 | False | ON |
| 5193 | 20210707 | 2021-07-08 01:41:14.972905 | 1205.786 | 0.021 | 177.694 | 6.946 | False | ON |
| 5194 | 20210707 | 2021-07-08 02:02:34.873506 | 1204.280 | 0.020 | 214.208 | 8.269 | False | ON |
| 5195 | 20210707 | 2021-07-08 02:16:24.810369 | 292.236 | 0.019 | 230.309 | 10.271 | False | ON |
| 5196 | 20210707 | 2021-07-08 02:25:59.058815 | 605.461 | 0.381 | 236.500 | 11.662 | True | wobble |
| 5197 | 20210707 | 2021-07-08 02:38:06.497275 | 606.417 | 0.418 | 245.497 | 14.658 | True | wobble |
| 5198 | 20210707 | 2021-07-08 02:51:02.354297 | 602.274 | 0.398 | 251.387 | 16.760 | True | wobble |
| 5199 | 20210707 | 2021-07-08 03:03:00.516614 | 605.874 | 0.402 | 252.977 | 19.611 | True | wobble |
| 5211 | 20210709 | 2021-07-09 22:50:58.651400 | 1205.470 | 0.370 | 90.657 | 37.872 | True | wobble |
| 5212 | 20210709 | 2021-07-09 23:15:16.868188 | 1205.343 | 0.428 | 94.403 | 31.785 | True | wobble |
| 5213 | 20210709 | 2021-07-09 23:46:33.454934 | 1205.261 | 0.399 | 98.543 | 25.197 | True | wobble |
| 5214 | 20210709 | 2021-07-10 00:10:33.631798 | 1201.304 | 0.402 | 106.053 | 20.354 | True | wobble |
| 5215 | 20210709 | 2021-07-10 00:34:57.851661 | 1204.504 | 0.376 | 112.827 | 15.470 | True | wobble |
| 5216 | 20210709 | 2021-07-10 01:00:10.746264 | 1206.832 | 0.422 | 131.291 | 10.101 | True | wobble |
| 5217 | 20210709 | 2021-07-10 01:24:30.383948 | 1205.869 | 0.398 | 160.492 | 6.922 | True | wobble |
| 5218 | 20210709 | 2021-07-10 01:49:41.124249 | 1206.164 | 0.403 | 205.604 | 8.073 | True | wobble |
| 5253 | 20210712 | 2021-07-13 00:58:23.075673 | 1205.001 | 0.379 | 138.150 | 9.080 | True | wobble |
| 5254 | 20210712 | 2021-07-13 01:23:14.131849 | 1206.654 | 0.420 | 184.029 | 6.975 | True | wobble |
| 5255 | 20210712 | 2021-07-13 01:47:16.445606 | 1203.150 | 0.398 | 221.435 | 8.531 | True | wobble |
| 5256 | 20210712 | 2021-07-13 02:11:20.228025 | 1201.871 | 0.403 | 239.169 | 13.172 | True | wobble |
| 5257 | 20210712 | 2021-07-13 02:33:55.047752 | 1205.168 | 0.383 | 250.357 | 17.114 | True | wobble |
| 5258 | 20210712 | 2021-07-13 02:58:36.310374 | 1206.582 | 0.415 | 258.359 | 23.067 | True | wobble |
| 5281 | 20210716 | 2021-07-17 01:58:45.359084 | 606.296 | 0.382 | 241.680 | 13.200 | True | wobble |
| 5284 | 20210716 | 2021-07-17 02:56:34.882860 | 1205.573 | 0.414 | 261.193 | 26.029 | True | wobble |
| 5285 | 20210716 | 2021-07-17 03:20:04.027781 | 1205.415 | 0.399 | 265.644 | 30.642 | True | wobble |
| 5286 | 20210716 | 2021-07-17 03:37:31.978401 | 486.510 | 0.401 | 266.766 | 34.734 | True | wobble |
| 5294 | 20210717 | 2021-07-18 00:00:54.795768 | 1205.661 | 0.376 | 111.738 | 15.997 | False | wobble |
| 5295 | 20210717 | 2021-07-18 00:24:54.352744 | 1205.205 | 0.422 | 127.894 | 10.745 | False | wobble |
| 5299 | 20210717 | 2021-07-18 01:13:54.687818 | 1206.271 | 0.398 | 200.712 | 6.971 | True | wobble |
| 5300 | 20210717 | 2021-07-18 01:37:59.408685 | 1206.359 | 0.403 | 229.105 | 10.732 | True | wobble |
| 5301 | 20210717 | 2021-07-18 02:03:47.384962 | 1205.794 | 0.383 | 246.089 | 14.978 | True | wobble |
| 5320 | 20210718 | 2021-07-19 00:20:59.428245 | 1206.284 | 0.378 | 125.137 | 11.347 | False | wobble |
| 5321 | 20210718 | 2021-07-19 00:45:18.481347 | 1206.659 | 0.421 | 157.894 | 7.455 | False | wobble |
| 5322 | 20210718 | 2021-07-19 01:10:06.164715 | 1203.304 | 0.398 | 200.913 | 6.987 | False | wobble |
| 5326 | 20210718 | 2021-07-19 01:53:36.855329 | 1206.637 | 0.402 | 242.509 | 14.294 | True | wobble |
| 5327 | 20210718 | 2021-07-19 02:18:57.552751 | 1202.194 | 0.384 | 253.242 | 18.914 | True | wobble |
| 5328 | 20210718 | 2021-07-19 02:43:21.359871 | 1201.198 | 0.414 | 260.142 | 24.866 | True | wobble |
| 5329 | 20210718 | 2021-07-19 03:07:08.815895 | 1206.109 | 0.399 | 264.874 | 29.535 | True | wobble |
| 5330 | 20210718 | 2021-07-19 03:30:44.162188 | 1206.552 | 0.401 | 266.901 | 34.969 | True | wobble |
| 6125 | 20210907 | 2021-09-07 20:59:10.755258 | 1205.524 | 0.378 | 124.154 | 11.577 | True | wobble |
| 6126 | 20210907 | 2021-09-07 21:23:12.990901 | 1205.299 | 0.421 | 155.315 | 7.588 | True | wobble |
| 6127 | 20210907 | 2021-09-07 21:47:15.248035 | 1205.164 | 0.398 | 196.709 | 6.816 | True | wobble |
| 6128 | 20210907 | 2021-09-07 22:10:35.035322 | 1205.448 | 0.403 | 226.375 | 10.253 | True | wobble |
| 6129 | 20210907 | 2021-09-07 22:33:47.974373 | 1205.418 | 0.383 | 243.388 | 13.879 | True | wobble |
| 6198 | 20210910 | 2021-09-10 21:00:37.748895 | 1157.028 | 0.421 | 139.966 | 8.843 | True | wobble |
| 6199 | 20210910 | 2021-09-10 21:22:28.734336 | 1159.121 | 0.398 | 171.222 | 6.611 | True | wobble |
| 6200 | 20210910 | 2021-09-10 21:43:20.062237 | 1172.043 | 0.403 | 207.669 | 8.199 | True | wobble |
| 6201 | 20210910 | 2021-09-10 22:06:16.572737 | 1400.066 | 0.382 | 232.938 | 10.951 | True | wobble |
| 6202 | 20210910 | 2021-09-10 22:38:58.567869 | 1208.935 | 0.416 | 251.895 | 18.029 | True | wobble |
| 6203 | 20210910 | 2021-09-10 23:00:16.579873 | 1166.859 | 0.398 | 258.398 | 22.026 | True | wobble |
| 6204 | 20210910 | 2021-09-10 23:21:18.495585 | 1202.413 | 0.402 | 260.967 | 26.864 | True | wobble |
| 6205 | 20210910 | 2021-09-10 23:42:55.358996 | 1211.386 | 0.387 | 265.112 | 31.062 | True | wobble |
| 6206 | 20210910 | 2021-09-11 00:02:55.673674 | 1217.310 | 0.411 | 268.387 | 36.205 | False | wobble |
| 6208 | 20210910 | 2021-09-11 00:47:32.362278 | 1206.405 | 0.399 | 272.881 | 45.754 | True | wobble |
| 6223 | 20210911 | 2021-09-11 22:47:39.440023 | 1188.808 | 0.384 | 254.708 | 19.958 | True | wobble |
| 6224 | 20210911 | 2021-09-11 23:09:07.997514 | 1188.388 | 0.414 | 260.555 | 25.306 | True | wobble |
| 6225 | 20210911 | 2021-09-11 23:30:04.701359 | 1148.914 | 0.399 | 264.754 | 29.356 | True | wobble |
| 6226 | 20210911 | 2021-09-11 23:49:53.932634 | 1204.881 | 0.401 | 266.265 | 33.963 | True | wobble |
| 6227 | 20210911 | 2021-09-12 00:12:02.313915 | 1172.191 | 0.390 | 269.596 | 38.313 | False | wobble |
| 6228 | 20210911 | 2021-09-12 00:30:34.922076 | 866.843 | 0.408 | 272.167 | 43.141 | False | wobble |
| 6229 | 20210911 | 2021-09-12 00:47:58.089294 | 906.975 | 0.401 | 274.398 | 46.445 | True | wobble |
| 6244 | 20210912 | 2021-09-12 21:53:20.006110 | 1284.220 | 0.382 | 228.547 | 10.084 | False | wobble |
| 6245 | 20210912 | 2021-09-12 22:15:07.177227 | 1181.297 | 0.417 | 245.585 | 14.756 | False | wobble |
| 6246 | 20210912 | 2021-09-12 22:36:24.544463 | 1197.066 | 0.398 | 254.190 | 18.612 | False | wobble |
| 6247 | 20210912 | 2021-09-12 22:58:01.640121 | 1232.768 | 0.402 | 257.764 | 23.537 | False | wobble |
| 6248 | 20210912 | 2021-09-12 23:19:36.515968 | 1208.833 | 0.386 | 262.595 | 27.689 | False | wobble |
| 6249 | 20210912 | 2021-09-12 23:50:33.302675 | 1328.482 | 0.411 | 267.791 | 35.214 | True | wobble |
| 6250 | 20210912 | 2021-09-13 00:05:53.763888 | 328.248 | 0.400 | 270.158 | 38.076 | True | wobble |
| 6251 | 20210912 | 2021-09-13 00:19:51.266180 | 1236.984 | 0.400 | 270.625 | 41.402 | True | wobble |
| 6252 | 20210912 | 2021-09-13 00:41:51.959164 | 1153.771 | 0.393 | 273.459 | 45.724 | True | wobble |
| 6253 | 20210912 | 2021-09-13 00:57:51.387474 | 595.861 | 0.405 | 275.503 | 49.979 | True | wobble |
| 6269 | 20210913 | 2021-09-13 22:58:57.497780 | 1562.563 | 0.385 | 259.350 | 24.064 | False | wobble |
| 6271 | 20210913 | 2021-09-13 23:30:41.016183 | 312.418 | 0.387 | 265.064 | 30.965 | False | wobble |
| 6272 | 20210913 | 2021-09-13 23:49:12.585701 | 28.083 | 0.388 | 267.697 | 35.026 | False | wobble |
| 6273 | 20210913 | 2021-09-14 00:00:57.099488 | 1229.859 | 0.410 | 269.620 | 38.362 | False | wobble |
| 6288 | 20210914 | 2021-09-15 00:04:45.977484 | 1164.339 | 0.400 | 269.760 | 39.817 | False | wobble |
| 6289 | 20210914 | 2021-09-15 00:25:30.855964 | 1163.854 | 0.392 | 272.532 | 43.863 | False | wobble |
| 6290 | 20210914 | 2021-09-15 00:46:18.103774 | 1208.983 | 0.406 | 275.120 | 49.172 | False | wobble |
| 6291 | 20210914 | 2021-09-15 01:08:00.772730 | 1193.965 | 0.402 | 277.627 | 53.399 | False | wobble |
| 8607 | 20220602 | 2022-06-03 02:18:17.116211 | 1168.144 | 0.375 | 100.131 | 24.574 | True | wobble |
| 8608 | 20220602 | 2022-06-03 02:39:12.544475 | 1189.029 | 0.423 | 106.122 | 19.362 | True | wobble |
| 8610 | 20220602 | 2022-06-03 03:12:23.674925 | 1175.487 | 0.399 | 117.749 | 12.744 | True | wobble |
| 8611 | 20220602 | 2022-06-03 03:32:43.771255 | 1134.869 | 0.402 | 137.193 | 9.706 | True | wobble |
| 8612 | 20220602 | 2022-06-03 03:52:58.185166 | 1134.483 | 0.380 | 161.859 | 7.264 | True | wobble |
| 8613 | 20220602 | 2022-06-03 04:12:50.695077 | 1130.355 | 0.418 | 204.330 | 7.555 | True | wobble |
| 8614 | 20220602 | 2022-06-03 04:28:44.929503 | 630.429 | 0.398 | 225.667 | 8.973 | True | wobble |
| 8891 | 20220624 | 2022-06-25 01:38:48.786781 | 1239.415 | 0.402 | 116.787 | 14.563 | True | wobble |
| 8892 | 20220624 | 2022-06-25 02:04:18.557745 | 1173.345 | 0.379 | 131.935 | 9.980 | True | wobble |
| 8893 | 20220624 | 2022-06-25 02:24:22.669043 | 1151.907 | 0.419 | 164.241 | 7.185 | True | wobble |
| 8894 | 20220624 | 2022-06-25 02:44:34.480588 | 1152.283 | 0.398 | 199.396 | 6.903 | True | wobble |
| 8895 | 20220624 | 2022-06-25 03:04:38.363385 | 1154.168 | 0.402 | 224.591 | 9.965 | True | wobble |
| 8896 | 20220624 | 2022-06-25 03:22:02.053649 | 841.338 | 0.383 | 239.084 | 12.399 | True | wobble |
| 9722 | 20221019 | 2022-10-19 20:30:27.600677 | 1794.876 | 0.015 | 257.908 | 22.698 | False | ON |
| 9723 | 20221019 | 2022-10-19 21:00:12.800844 | 1206.477 | 0.012 | 263.753 | 29.174 | False | ON |
| 9724 | 20221019 | 2022-10-19 21:21:36.919730 | 1205.612 | 0.011 | 266.964 | 33.859 | False | ON |
| 9725 | 20221019 | 2022-10-19 21:43:03.569971 | 1206.730 | 0.009 | 269.741 | 38.567 | False | ON |
| 9726 | 20221019 | 2022-10-19 22:04:13.933069 | 1206.449 | 0.008 | 272.208 | 43.217 | False | ON |
| 9727 | 20221019 | 2022-10-19 22:26:16.460377 | 1205.381 | 0.006 | 274.589 | 48.049 | False | ON |
| 9728 | 20221019 | 2022-10-19 22:43:13.303530 | 605.614 | 0.004 | 276.339 | 51.755 | False | ON |
| 9752 | 20221020 | 2022-10-20 21:02:33.395669 | 5316.643 | 0.012 | 264.317 | 30.563 | False | ON |
Data analysis Information
Bad quality runs and runs taken in ON mode were discarded from the analysis. The SGR 1935+2154 analysis covers 25.8 hours of observations over 83 runs and 13 nights. Plots can be found in presentation pdf.
- Runs exclusion criteria (info taken from long-term data check files):
- Source offset not in [0.35,0.45] deg.
- Rate of cosmics < 2500 evt/s
- Pedestal charge standard deviation > 2 P.E.
- Monte Carlo simulations of DL2 and trained RF were requested to lstmcpipe team, NSB tuned. MC prod name: 20230428_src_dec2276_tuned_nsb_az_tel
- lstchain version: 0.9.13
- IRFs were computed point-like and with energy-dependent cuts.
- GH-efficiency: 0.7.
- Theta Containment: 0.68
- Event selector filter: INTENSITY>80 P.E.
- High-level analysis was performed with gammapy v1.0
- Standard Wobble Analysis was performed with 1 off region.
- Flux Points upper limits were obtained for the source under different conditions:
- SED ULs in [0.1, 10] TeV, 5 bins per energy decade.
- 1 set of stacked ULs for total integrated livetime.
- 13 sets of night-wise ULs.
- Light Curve UL run-wise and night-wise, energy integrated in [0.1, 50] TeV
- SED ULs in [0.1, 10] TeV, 5 bins per energy decade.
