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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"

3406 results found.

  1. GRB 151022A: MITSuME Okayama Ks-band upper-limit
  2. GRB 151021A: MITSuME Okayama Ks-band upper-limit
  3. GRB 151021A: Swift-XRT refined Analysis
  4. GRB 151004A: Swift-XRT follow-up observations
  5. GRB 151006A: MITSuME Okayama Ks-band upper-limit
  6. GRB 151006A: Swift-XRT refined Analysis
  7. Trigger 657564 / GRB 151004A: Swift BAT and XRT refined analysis
  8. Swift Trigger 657564: XRT prompt analysis
  9. GRB 151001B: Swift-XRT refined Analysis
  10. GRB 151001A: Swift-XRT refined Analysis
  11. GRB 150925A: Swift-XRT refined Analysis
  12. LIGO/Virgo G184098: SkyMapper observations
  13. LIGO/Virgo G184098: Swift follow-up observations
  14. GRB 150915A: Swift-XRT refined Analysis
  15. GRB150915A : IRSF NIR upper limits
  16. GRB 150907A: Swift-XRT afterglow detection
  17. GRB 150912A: Swift-XRT and UVOT observations
  18. GRB 150911A: Swift-XRT refined Analysis
  19. GRB150911A MITSuME Okayama Ks-band upper-limit
  20. GRB 150910A: MITSuME Okayama Ks-band Observation
  21. GRB 150910A: Swift-XRT refined Analysis
  22. GRB 150910A: Swift/UVOT Detection of a Brightening Afterglow
  23. GRB 150907B: Swift-XRT refined Analysis
  24. GRB 150907A: Swift-XRT observations
  25. GRB 150902A: Swift-XRT afterglow detection
  26. GRB 150902A: Swift-XRT observations
  27. GRB 150821A: Flattening in the UVOT light curve
  28. GRB 150831B: Swift-XRT refined Analysis
  29. GRB 150831A: Swift-XRT refined Analysis
  30. GRB 150821A: Swift-XRT refined Analysis
  31. GRB 150819A: Swift-XRT refined Analysis
  32. GRB 150818A: Swift-XRT update, correction to GCN 18162
  33. GRB 150818A: Swift-XRT refined Analysis
  34. GRB 150817A: Swift-XRT refined Analysis
  35. GRB 150811A: KAIT Refined Analysis
  36. GRB 150811A: Swift-XRT refined Analysis
  37. GRB 150727A: IRSF NIR observation
  38. GRB 150801A: Swift-XRT observations
  39. GRB 150801B: Swift-XRT refined Analysis
  40. GRB 150724B: Swift-XRT afterglow detection
  41. GRB 150728A: Swift-XRT refined Analysis
  42. GRB 150727A: Swift-XRT refined Analysis
  43. GRB 150724B: Swift-XRT observations
  44. Correction to GCN 18059: Parameterisation of Swift-XRT light curve
  45. GRB 150724A: Swift-XRT refined Analysis
  46. GRB 150722A: Swift-XRT refined Analysis
  47. GRB 150720A: Swift-XRT refined Analysis
  48. GRB 150716A: Swift-XRT refined Analysis
  49. GRB 150710B: Swift-XRT afterglow detection
  50. GRB 150710B: Swift-XRT and Swift-UVOT observations
  51. GRB 150711A: Swift-XRT refined Analysis
  52. Swift-XRT observations of GRB 150710A
  53. GRB 150702A: Swift-XRT observations
  54. GRB 150622A: Swift-XRT afterglow detection
  55. GRB 150627A: Swift-XRT afterglow detection
  56. GRB 150626B: Swift-XRT refined Analysis
  57. GRB 150626A: Swift-XRT refined Analysis
  58. GRB 150622A: Swift-XRT observations
  59. GRB 150616A: Swift-XRT refined Analysis
  60. GRB 150615A: Swift-XRT refined Analysis
  61. GRB 150608A: Swift-XRT follow-up observations
  62. GRB 150608A: Swift-XRT afterglow detection
  63. GRB 150607A: Swift-XRT refined Analysis
  64. Swift trigger 642453 is not an astrophysical source
  65. GRB 150530B: Swift-XRT observations
  66. GRB 150530A: Swift-XRT refined Analysis
  67. GRB 150513A: Swift-XRT observations
  68. GRB 150527A: Swift-XRT refined Analysis
  69. GRB 150523A Swift-XRT afterglow detection
  70. GRB 150518A: Swift-XRT follow-up observations
  71. GRB 150518A: Swift-XRT afterglow detection
  72. GRB 150514A: Further Swift observations
  73. GRB 150514A: Swift-XRT afterglow detection
  74. Confirmation that Swift Trigger 639636 is not astrophysical
  75. GRB 150430A: Swift-XRT refined Analysis
  76. GRB 150428B: IRSF NIR upper limits
  77. GRB 150428B: Swift/UVOT Upper Limits
  78. GRB 150428C: Swift-XRT observations
  79. GRB 150428B: Swift-XRT refined Analysis
  80. GRB 150428A: Swift-XRT refined Analysis
  81. GRB 150424A: Swift-XRT refined Analysis
  82. GRB 150423A: Swift-XRT refined Analysis
  83. GRB 150423A: GROND afterglow candidate
  84. GRB150418A: Swift/UVOT did not detect a new source
  85. Further Swift XRT observations of GRB 150418A
  86. GRB 150413A: Swift-XRT observations
  87. GRB 150418A: Swift-XRT observations
  88. Confirmation that Swift trigger 638217 is not an astrophysical source
  89. Swift GRB150402A: further XRT observations
  90. GRB 150407A: Swift-XRT observations
  91. GRB 150403A: Swift-XRT refined Analysis
  92. GRB 150402A: results of Swift observations
  93. GRB 150323B: Swift-XRT afterglow detection
  94. GRB 150323C: Nishi-Harima NIR Observations
  95. GRB 150323B: Swift-XRT observations
  96. GRB 150323C: Swift-XRT refined Analysis
  97. GRB 150323A: Swift-XRT refined Analysis
  98. GRB 150318A: Swift-XRT refined Analysis
  99. GRB 150317A: Swift-XRT refined Analysis
  100. GRB 150314A: Swift-XRT refined Analysis

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