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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

12114 results found.

  1. EP241119a: Global MASTER-Net observations report
  2. EP241119a: EP detection of a fast X-ray transient
  3. GRB241120A: a long GRB detected by INTEGRAL
  4. GRB 241120A: Fermi GBM Final Real-time Localization
  5. GRB 241119A: Fermi GBM Final Real-time Localization
  6. GRB 241117A: Swift/BAT-GUANO localization skymap of a burst
  7. LIGO/Virgo/KAGRA S241116cq: Upper limits from Swift/BAT-GUANO
  8. Fermi GRB 241118A: Global MASTER-Net observations report
  9. Fermi GRB 241117B: Global MASTER-Net observations report
  10. GRB 241117B: Fermi GBM Final Real-time Localization
  11. GRB 241115B: Swift/BAT-GUANO localization skymap of a long burst
  12. Fermi GRB 241117A: Global MASTER-Net observations report
  13. EP241115a/GRB 241115D: Swift/XRT follow-up observation
  14. GRB 241115C: Swift/BAT-GUANO localization skymap of a burst
  15. EP241115a: EP detection of a fast X-ray transient
  16. GRB 241115A: Swift detection of a burst
  17. EP 241113a: LBT possible optical counterpart
  18. GRB 241113B: KAIT Optical Afterglow Candidate
  19. LIGO/Virgo/KAGRA S241114bi: Coverage and upper limits from MAXI/GSC observations
  20. GRB 241030A: LCO optical observation
  21. EP241113b: Global MASTER-Net observations report
  22. Fermi-LAT gamma-ray observations of IceCube-241113A
  23. GRB 241113A: Swift-XRT refined Analysis
  24. Konus-Wind detection of GRB 241107A (short/hard)
  25. GRB 241112B: GMG Optical Upper Limit
  26. GRB 241113B : detection of a long GRB by SVOM/ECLAIRs
  27. SVOM/GRM detection of a short burst from SGR 1E1841-045
  28. Fermi trigger No 753166198: Global MASTER-Net observations report
  29. GRB 241107A: GROWTH-India telescope optical upper limit
  30. GRB 241112B: Swift-XRT afterglow detection
  31. GRB 241112B : detection of a long GRB by SVOM/ECLAIRs
  32. GRB 241107A: INTEGRAL IBIS localization
  33. LIGO/Virgo/KAGRA S241110br: NED Galaxies in the Localization Volume
  34. GRB 241018A: cubesat Avion detection
  35. LIGO/Virgo/KAGRA S241109bn: Upper limits from EP-WXT observations
  36. Fermi trigger No 752878030: Global MASTER-Net observations report
  37. LIGO/Virgo/KAGRA S241109bn: Coverage and upper limits from MAXI/GSC observations
  38. INTEGRAL detection of a burst from 1E 1841-045
  39. LIGO/Virgo/KAGRA S241109bn: Global MASTER-Net observations report
  40. EP241109a: confirmation of a stellar flare by BOOTES-7
  41. GRB 241108A : a likely weak long GRB detected by SVOM/ECLAIRs
  42. EP241107a: AKO Optical Afterglow Follow-Up Observations
  43. EP241107a: AKO Optical Afterglow Detection
  44. Konus-Wind detection of GRB 241105A (short with extended emission)
  45. Konus-Wind detection of GRB 241021A
  46. Fermi GRB 241105A: Global MASTER-Net observations report
  47. EP241104a: EP detection of GRB 241104A X-ray emission
  48. Fermi GRB 241104A: Global MASTER-Net observations report
  49. EP241103a: GIT optical upper limit
  50. EP241021a: OHP/T193 further optical observations
  51. Fermi trigger No 752365806: Global MASTER-Net observations report
  52. LIGO/Virgo/KAGRA S241102br: OHP/T193 optical observations
  53. EP241101a: OHP/T193 optical observations
  54. EP241103a: EP observation update
  55. LIGO/Virgo/KAGRA S241102br: MASTER observations and OT detection
  56. LIGO/Virgo/KAGRA S241102br: EP-WXT X-ray follow-up and flux limits
  57. GRB 241030A: Swift-UVOT observations of the optical prompt flare
  58. EP241103a: Global MASTER-Net observations report
  59. EP241103a: an X-ray transient detected by Einstein Probe
  60. LIGO/Virgo/KAGRA S241102br: NED Galaxies in the Localization Volume
  61. EP241021a: Upper limit from Konus-Wind observations
  62. GRB 241030B: NUTTelA-TAO / BSTI Optical Limits
  63. GRB 241030A / EP241030a: FTW Optical and NIR observations of the optical counterpart
  64. EP241026b: Liverpool Telescope optical follow-up
  65. Fermi trigger No 752083996: Global MASTER-Net observations report
  66. GRB 241030A: SAO RAS optical observations
  67. GRB 241030A: Fermi GBM Observation
  68. EP241021a: AMI-LA radio detection
  69. GRB 241030B : GIT optical upper limits
  70. EP EP241030a: Global MASTER-Net observations report
  71. Fermi trigger No 752006065: Global MASTER-Net observations report
  72. Swift GRB241030.77: Global MASTER-Net observations report
  73. GRB241030B: Fermi GBM Observation
  74. GRB 241030B: BTA observations
  75. GRB 241030B: optical observations from the INAF Asiago Observatory
  76. GRB 241030B: Nanshan/HMT optical afterglow detection
  77. Konus-Wind detection of GRB 241030A
  78. GRB 241030B: Swift detection of a burst
  79. GRB 241030B: Fermi GBM Final Real-time Localization
  80. GRB 241030A: Fermi-LAT detection
  81. GRB 241030A: Swift/UVOT Detection
  82. GRB 241030A: Swift detection of a burst with a bright optical counterpart
  83. EP241021a: ATCA radio observations
  84. GRB 241029A: Fermi GBM Observation
  85. Fermi trigger No 751861204: Global MASTER-Net observations report
  86. Konus-Wind detection of GRB 241025A
  87. GRB 241025A: further SAO RAS optical observations
  88. GRB 241026A: BTA and Zeiss-1000 optical observations
  89. GRB 241026A Fermi GBM Analysis
  90. GRB 241025A: SAO RAS optical observations
  91. EP241021a: further SAO RAS optical observations
  92. EP241026a (GRB 241026A): EP on-board trigger and follow-up observation
  93. GRB 241026A: Swift-XRT refined Analysis
  94. GRB 241026A: SAO RAS observations of possible optical afterglow
  95. GRB 241026A: Swift detection of a burst
  96. Swift GRB241026.95: Global MASTER-Net observations report
  97. GRB241025A: 1.3m DFOT optical afterglow detection
  98. LIGO/Virgo/KAGRA S241009l: Upper limits from Swift/BAT-GUANO
  99. Fermi trigger No 751554401: Global MASTER-Net observations report
  100. Fermi GRB 241025A: Global MASTER-Net observations report

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