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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.

Advanced Search Examples (click to copy):

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

28232 results found.

  1. GRB 180728A: Enhanced Swift-XRT position
  2. GRB 180728A: MASTER OT J165415.75-540239.27 is the Optical Counterpart of GRB
  3. GRB 180728A: Swift-XRT observations
  4. GRB 180727A: Swift-BAT refined analysis
  5. GRB 180727A: Swift-XRT refined Analysis
  6. NuSTAR observations of GRB 180720B
  7. GRB 180720B: OAJ optical observations
  8. GRB 180722B: Insight-HXMT/HE detection
  9. GRB 180724A: Insight-HXMT/HE detection
  10. GRB 180720B: AMI-LA 15.5 GHz observation
  11. GRB 180720B long follow up requested
  12. GRB 180723A: Fermi GBM detection
  13. GRB 180720B: KAIT Optical Observations
  14. GRB 180722A: Swift-XRT observations
  15. GRB 180718B: Swift-XRT observations
  16. GRB 180718A: Swift-XRT observations
  17. GRB 180723.13: MASTER optical observation of the short Fermi GBM trigger number 554008254
  18. GRB 180722A: MASTER second inspection
  19. GRB 180723.76: MASTER optical observation of the bright long Fermi GBM trigger number 554062193
  20. GRB 180720B: REM photometry
  21. GRB 180720B: ISON-Castelgrande optical observations
  22. GRB 180720B: Testing the universality of the newly born neutron star in BdHNe
  23. GRB 180720B: COATLI Optical Detection
  24. GRB 180720C: BOOTES-2/TELMA optical observations
  25. GRB 180721A: Swift/UVOT Upper Limits
  26. GRB 180720C: MASTER optical observation
  27. GRB 180722A: MASTER optical observation
  28. GRB 180722A: MAXI/GSC detection
  29. GRB 180720C: Swift-XRT refined Analysis
  30. GRB 180721A: Swift-BAT refined analysis
  31. GRB 180720C: Swift-BAT refined analysis
  32. GRB 180721A: Swift-XRT refined Analysis
  33. GRB 180720B: Swift-BAT refined analysis
  34. GRB 180721A: Enhanced Swift-XRT position
  35. GRB 180721A: Swift detection of a burst
  36. GRB 180720B: MAXI/GSC detection
  37. GRB 180720C: Swift/UVOT Upper Limits
  38. GRB 180720C: Fermi GBM observation
  39. GRB 180720C: Enhanced Swift-XRT position
  40. GRB 180720B: Swift-XRT refined Analysis
  41. GRB 180720C: Swift detection of a burst or possible Galactic Transient
  42. GRB 180720B: Fermi GBM observation
  43. GRB 180720B : TSHAO optical observations
  44. GRB 180720B: Kanata 1.5m optical/NIR observation
  45. GRB 180720B: LCO Haleakala possible bright optical candidate
  46. GRB 180720A: Fermi GBM observation
  47. GRB 180720B: Swift detection of a burst
  48. GRB 180718B: MASTER optical observation
  49. GRB 180715A: Swift/UVOT Upper Limits
  50. Swift detects a flare from AX 1631.9-4752
  51. GRB 180718B: Fermi GBM detection
  52. GRB 180718A: Fermi GBM detection
  53. GRB 180718A short GRB detected by IPN and found in ground analysis of BAT data
  54. GRB 180715A: COATLI Optical Observations
  55. GRB 180715A: Swift-XRT observations
  56. GRB 180715A: Swift-BAT refined analysis
  57. GRB 180715A: GOTO optical limits
  58. GRB 180715A: LCO Sutherland possible optical candidate
  59. GRB 180715A: Swift-XRT observations
  60. GRB180714A: a long GRB detected by INTEGRAL
  61. IceCube-171106A: MASTER optical observation
  62. GRB 180705A: OSN observations
  63. GRB 180709A: Swift-BAT refined analysis
  64. GRB 180709A: Swift/UVOT Upper Limits
  65. GRB 180709A: Swift-XRT refined Analysis
  66. GRB 180709A: Optical limits
  67. GRB 180709A: COATLI Optical Observations
  68. GRB 180709A: Enhanced Swift-XRT position
  69. GRB 180703A: Swift-XRT afterglow detection
  70. GRB 180709A: Swift detection of a burst
  71. GRB 180705A: RTT150 optical upper limit
  72. Trigger 846740: Swift trigger near NGC5055
  73. IPN Triangulation of GRB 180703A
  74. GRB 180706A: GOTO optical limits
  75. GRB 180706A: TSHAO optical observations
  76. GRB 180706A: Swift/UVOT Detection
  77. GRB 180706A: Swift-BAT refined analysis
  78. GRB 180705A: Swift-XRT refined Analysis
  79. GRB 180706A: Fermi GBM observation
  80. GRB 180706A: Swift-XRT refined Analysis
  81. GRB 180706A: Enhanced Swift-XRT position
  82. Konus-Wind observation of GRB 180701A
  83. GRB 180705A: TSHAO optical upper limit
  84. GRB 180705A: Swift/UVOT Upper Limits
  85. GRB 180705A: RATIR Optical Observations
  86. GRB 180706A: COATLI Optical Detection
  87. GRB 180706A: Swift detection of a burst with optical counterpart
  88. IPN Triangulation of GRB 180703B
  89. GRB 180705A: Swift-BAT refined analysis
  90. GRB 180705A: Enhanced Swift-XRT position
  91. GRB 180705A: Swift-XRT observations
  92. GRB 180705A: Swift detection of a burst
  93. GRB 180703A: Swift/UVOT Upper Limits
  94. GRB 180703A: Fermi GBM detection
  95. GRB 180704A: Swift-XRT refined Analysis
  96. GRB 180704A: Swift-BAT refined analysis
  97. GRB 180704A: Swift/UVOT Upper Limits
  98. GRB 180703A: LCO Sutherland possible optical candidate
  99. GRB 180703A: Swift-XRT observations
  100. GRB 180704A: Enhanced Swift-XRT position

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