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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"

24541 results found.

  1. GRB 150724A: Swift-XRT refined Analysis
  2. Swift IGR J00291+5934: MASTER Optical flare detection
  3. IGR J00291+5934: Swift-BAT refined analysis
  4. GRB 150724A: Swift-BAT refined analysis
  5. GRB 150722A: LCOGT-Sutherland observations
  6. GRB 150722A: Swift-BAT refined analysis
  7. GRB 150722A: Swift detection of a burst
  8. GRB 150721A: Fermi GBM detection
  9. GRB 150720A: Swift-XRT refined Analysis
  10. GRB 150720A: Swift-BAT refined analysis
  11. Swift Trigger 649706: a possible GRB or bright Galactic transient
  12. GRB 150716A: KAIT Optical Upper Limit
  13. GRB 150716A: Swift-BAT refined analysis
  14. GRB 150716A: Continued RATIR Optical Observations
  15. GRB 150716A: P60 Candidate Optical Afterglow
  16. Trigger 649143: Swift detection of AX J1619.4-4945
  17. GRB 150711A: Swift-BAT refined analysis
  18. Konus-Wind observation of GRB 150710B
  19. GRB 150710B: Swift-XRT and Swift-UVOT observations
  20. GRB 150711A: Fermi GBM detection
  21. GRB 150710B refined analysis
  22. MASTER OT Detection during Fermi Trigger 458235025 inspection
  23. Swift-XRT observations of GRB 150710A
  24. Konus-Wind observation of GRB 150710A (Swift trigger 648437)
  25. GRB 150710A: Swift-BAT refined analysis
  26. Swift trigger 648437: A GRB or a burst from 1RXS J125754.7+141850
  27. Swift Trigger 648422: Swift-XRT observations
  28. Trigger 648422: Swift possible detection of a source in NGC4552
  29. Konus-Wind observation of GRB 150702A
  30. GRB 150702A: Fermi GBM detection
  31. GRB 150702A: MASTER-SAAO inspection
  32. GRB 150702A: Swift-XRT observations
  33. GRB 150702A: Fermi-LAT detection
  34. Konus-Wind observation of GRB 150627A
  35. GRB 150626B, Swift-BAT refined analysis
  36. V404 Cyg activity (Swift, Fermi, INTGRAL, KONUS, MAXI detection): optical observations in TSHAO, Khureltogot, and AAO
  37. GRB 150627A: corection to 17978
  38. GRB 150627A: MASTER-SAAO OT Detection
  39. GRB 150627A: Fermi GBM observation
  40. GRB 150626B: Swift-XRT refined Analysis
  41. GRB 150626A: Swift-BAT refined analysis
  42. GRB 150627A: Fermi-LAT detection
  43. GRB 150626B: NOT optical upper limits
  44. GRB 150626B: MASTER observations
  45. GRB 150626A: Swift-XRT refined Analysis
  46. Trigger 646721: Swift detection of V 404 Cyg
  47. GRB 150626A: Swift detection of a burst
  48. Swift Trigger 646423 is GS 1354-645
  49. V404 Cyg: MASTER Swift, Integral alert observations
  50. GRB 150622A: Swift-XRT observations
  51. Swift Trigger 645340: a possible GRB
  52. Trigger 645176: Swift detection of V404 Cyg
  53. V404 Cyg: Fermi GBM observations
  54. IBAS trigger 7015 is not a GRB
  55. GRB 150616A: Swift-BAT refined analysis
  56. GRB 150616A: Swift-XRT refined Analysis
  57. Konus-Wind observation of Galactic transient V404 Cyg in outburst
  58. V404 Cyg: Swift/UVOT Detection
  59. Optical follow-up of Swift trigger on V404 Cyg
  60. GRB 150615A, Swift-BAT refined analysis
  61. GRB 150608A: MITSuME Akeno optical upper limits
  62. Konus-Wind observation of GRB 150608A
  63. GRB 150608A: Swift-XRT afterglow detection
  64. Konus-Wind observation of GRB 150607A
  65. GRB 150607A: Swift-BAT refined analysis
  66. GRB 150607A: Fermi GBM Detection
  67. Swift Trigger 642453: a possible GRB
  68. Konus-Wind observation of GRB 150530A
  69. GRB 150530A: Fermi GBM observation
  70. GRB 150530A: Swift-BAT refined analysis
  71. GRB 150530A: Swift detection of a burst
  72. Konus-Wind observation of GRB 150527A
  73. GRB 150527A: Swift-XRT refined Analysis
  74. GRB 150527A: MITSuME Okayama upper limits
  75. GRB 150527A: Swift-BAT refined analysis
  76. GRB 150527A: Fermi GBM observation
  77. GRB 150527A: LCOGT McDonald observations
  78. GRB 150523A: Suzaku WAM observation of the prompt emission
  79. GRB 150527A: Swift detection of a burst
  80. Konus-Wind observation of GRB 150523A
  81. GRB 150523A: LCOGT FTS afterglow confirmation
  82. GRB 150523A: Fermi-LAT detection
  83. GRB 150523A: Fermi GBM detection
  84. GRB 150518A: MAXI-GSC further analysis
  85. GRB 150518A: MITSuME Akeno Optical observation
  86. GRB 150518A: MASTER-net before, early and after optical stereoscopic observations with possible MP discovery inside MAXI error box
  87. GRB 150518A : Xinglong TNT upper limit
  88. GRB 150518A: Correction
  89. GRB 150518A: Swift-XRT afterglow detection
  90. Konus-Wind observation of GRB 150514A
  91. GRB 150514A: GROND Bright Afterglow Confirmation
  92. GRB 150514A: Fermi GBM Detection
  93. GRB 150514A: Fermi-LAT detection
  94. GRB 150513A: Swift-BAT refined analysis
  95. GRB 150513A: Fermi GBM detection
  96. GRB 150513A: Fermi-LAT detection
  97. GRB 150512A: Fermi GBM detection
  98. GRB 150513A: Swift detection of a burst
  99. GRB 150512A: iPTF Optical Observations
  100. Konus-Wind observation of GRB 150510A

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