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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"

12385 results found.

  1. GRB 140824B: Fermi GBM Detection
  2. GRB 140821A: Fermi GBM Detection
  3. Fermi TRIGGER_NUM 430583595: MASTER OT 20 hours later
  4. Fermi TRIGGER_NUM 430583595: MASTER OT JR011101.13+603337.5 detection
  5. Fermi GBM Trigger 140819576/ 430148973/ MASTER OT
  6. Fermi trigger 430148973: Swift-XRT observation
  7. GRB 140808A/iPTF14eag: AMI 15 GHz detection
  8. GRB140819A: Deep GROND Upper Limits
  9. Fermi 430148973/MASTER candidate: LCO-Sutherland observations
  10. Fermi trigg_num 430148973: OSN I-band observations
  11. Fermi trigg_num 430148973: bright OT inside large error box!
  12. Konus-Wind observation of GRB 140818A
  13. GRB 140818B: Fermi GBM detection
  14. GRB 140818A - Fermi GBM Detection
  15. GRB 140818A: Correction to GCN 16702
  16. Konus-Wind observation of GRB 140817A
  17. GRB 140817A: Fermi GBM Detection
  18. GRB 140808A / PTFeag: VLA K-band observations
  19. IPN triangulation of GRB 140810A
  20. GRB 140808A: Confirmation of the Swift-XRT afterglow
  21. GRB140809A: Fermi GBM observation
  22. GRB 140810A: Fermi GBM observation
  23. Konus-Wind observation of GRB 140810A
  24. GRB140810A: Fermi-LAT detection
  25. Swift observations of possible GRB 140809A candidate
  26. GRB 140809A : Virtual Telescope optical observations
  27. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  28. Konus-Wind observation of GRB 140808A
  29. GRB 140808A: Redshift from the 10.4m GTC telescope
  30. GRB 140808A: Fermi GBM detection
  31. GRB 140808A: optical afterglow candidate iPTF14eag
  32. GRB 140801A: GROND Afterglow detection, unbroken decay
  33. GRB140801A: Swift/XRT further observations
  34. GRB 140801A: BTA confirmation of redshift
  35. GRB 140801A: Swift/UVOT Upper Limits
  36. GRB 140801A: Swift-XRT observations
  37. Konus-Wind observation of GRB 140801A
  38. GRB 140801A : Virtual Telescope optical observations
  39. GRB 140801A: Fermi GBM observation
  40. GRB 140801A: Redshift from the 10.4m GTC telescope
  41. GRB 140801A: NOT afterglow confirmation
  42. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  43. GRB 140801A: archival upper limits on the host galaxy
  44. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  45. Konus-Wind observation of GRB 140729A
  46. GRB 140729A: iPTF optical upper limit
  47. IPN Triangulation of GRB 140729A
  48. GRB 140729A: Fermi-GBM detection
  49. Correction to Fermi-LAT GCN Circular 16633
  50. GRB 140729A Tiled Swift observations
  51. GRB 140729A: Fermi-LAT detection
  52. GRB 140723A: MASTER optical observation
  53. Konus-Wind observation of GRB 140723A
  54. GRB 140723A: LCO-Sutherland optical candidate
  55. GRB 140723A: Fermi GBM detection
  56. IPN Triangulation of GRB 140723A
  57. GRB 140723A Tiled Swift observations
  58. GRB 140723A: Fermi-LAT detection
  59. Konus-Wind observation of GRB 140721A
  60. IPN Triangulation of GRB 140721A
  61. GRB 140721A: Fermi GBM detection
  62. Konus-Wind observation of GRB 140716A
  63. GRB 140716A: Swift-XRT detection of an afterglow candidate
  64. GRB 140716A: A Fermi GBM Detection
  65. GRB 140716A found in ground analysis of Swift-BAT data
  66. GRB 140714A: Fermi GBM detection
  67. GRB 140713A: Fermi GBM detection
  68. GRB 140710B: Fermi GBM detection
  69. Fermi GBM Observations of SGR 1935+2154
  70. GRB 140709B: Fermi GBM detection
  71. GRB 140709A: Fermi GBM detection
  72. Fermi GBM trigger 140708682 is not a GRB
  73. GRB 140706A: Fermi GBM detection
  74. GRB 140621A: Suzaku WAM observation of the prompt emission
  75. GRB 140703A: Fermi GBM detection
  76. Fermi 425667201: optical counterpart search
  77. GRB 140619B: Magellan near-infrared observations
  78. GRB 140623A: further Swift-XRT observations
  79. GRB 140619B: Suzaku WAM observation of the prompt emission
  80. GRB 140620A / iPTF14cva: TShAO optical observations
  81. GRB 140624A: Fermi GBM observation of a short burst
  82. GRB 140623A: Swift-XRT and UVOT observations
  83. GRB 140623A / iPTF14cyb: Fermi GBM detection
  84. GRB 140621A: Fermi GBM detection
  85. IPN Triangulation of GRB 140621A
  86. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  87. GRB 140620A / iPTF14cva: Konkoly optical observations
  88. GRB 140620A: Swift/UVOT Detection
  89. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  90. GRB 140620A: Swift-XRT observations
  91. GRB 140620A / iPTF14cva: Fermi GBM observations
  92. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  93. GRB 140619B: Swift-XRT observations
  94. GRB 140619B: Fermi-LAT Detection
  95. GRB 140619B: Fermi GBM detection of a short GRB
  96. GRB 140610A: Fermi GBM Detection
  97. Konus-Wind observation of GRB 140606B
  98. GRB 140606B: Swift XRT refined analysis
  99. IPN Triangulation of GRB 140606B
  100. GRB 140606B: Swift/UVOT Upper Limits

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