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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"

12376 results found.

  1. Fermi trigg_num 430148973: OSN I-band observations
  2. Fermi trigg_num 430148973: bright OT inside large error box!
  3. Konus-Wind observation of GRB 140818A
  4. GRB 140818B: Fermi GBM detection
  5. GRB 140818A - Fermi GBM Detection
  6. GRB 140818A: Correction to GCN 16702
  7. Konus-Wind observation of GRB 140817A
  8. GRB 140817A: Fermi GBM Detection
  9. GRB 140808A / PTFeag: VLA K-band observations
  10. IPN triangulation of GRB 140810A
  11. GRB 140808A: Confirmation of the Swift-XRT afterglow
  12. GRB140809A: Fermi GBM observation
  13. GRB 140810A: Fermi GBM observation
  14. Konus-Wind observation of GRB 140810A
  15. GRB140810A: Fermi-LAT detection
  16. Swift observations of possible GRB 140809A candidate
  17. GRB 140809A : Virtual Telescope optical observations
  18. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  19. Konus-Wind observation of GRB 140808A
  20. GRB 140808A: Redshift from the 10.4m GTC telescope
  21. GRB 140808A: Fermi GBM detection
  22. GRB 140808A: optical afterglow candidate iPTF14eag
  23. GRB 140801A: GROND Afterglow detection, unbroken decay
  24. GRB140801A: Swift/XRT further observations
  25. GRB 140801A: BTA confirmation of redshift
  26. GRB 140801A: Swift/UVOT Upper Limits
  27. GRB 140801A: Swift-XRT observations
  28. Konus-Wind observation of GRB 140801A
  29. GRB 140801A : Virtual Telescope optical observations
  30. GRB 140801A: Fermi GBM observation
  31. GRB 140801A: Redshift from the 10.4m GTC telescope
  32. GRB 140801A: NOT afterglow confirmation
  33. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  34. GRB 140801A: archival upper limits on the host galaxy
  35. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  36. Konus-Wind observation of GRB 140729A
  37. GRB 140729A: iPTF optical upper limit
  38. IPN Triangulation of GRB 140729A
  39. GRB 140729A: Fermi-GBM detection
  40. Correction to Fermi-LAT GCN Circular 16633
  41. GRB 140729A Tiled Swift observations
  42. GRB 140729A: Fermi-LAT detection
  43. GRB 140723A: MASTER optical observation
  44. Konus-Wind observation of GRB 140723A
  45. GRB 140723A: LCO-Sutherland optical candidate
  46. GRB 140723A: Fermi GBM detection
  47. IPN Triangulation of GRB 140723A
  48. GRB 140723A Tiled Swift observations
  49. GRB 140723A: Fermi-LAT detection
  50. Konus-Wind observation of GRB 140721A
  51. IPN Triangulation of GRB 140721A
  52. GRB 140721A: Fermi GBM detection
  53. Konus-Wind observation of GRB 140716A
  54. GRB 140716A: Swift-XRT detection of an afterglow candidate
  55. GRB 140716A: A Fermi GBM Detection
  56. GRB 140716A found in ground analysis of Swift-BAT data
  57. GRB 140714A: Fermi GBM detection
  58. GRB 140713A: Fermi GBM detection
  59. GRB 140710B: Fermi GBM detection
  60. Fermi GBM Observations of SGR 1935+2154
  61. GRB 140709B: Fermi GBM detection
  62. GRB 140709A: Fermi GBM detection
  63. Fermi GBM trigger 140708682 is not a GRB
  64. GRB 140706A: Fermi GBM detection
  65. GRB 140621A: Suzaku WAM observation of the prompt emission
  66. GRB 140703A: Fermi GBM detection
  67. Fermi 425667201: optical counterpart search
  68. GRB 140619B: Magellan near-infrared observations
  69. GRB 140623A: further Swift-XRT observations
  70. GRB 140619B: Suzaku WAM observation of the prompt emission
  71. GRB 140620A / iPTF14cva: TShAO optical observations
  72. GRB 140624A: Fermi GBM observation of a short burst
  73. GRB 140623A: Swift-XRT and UVOT observations
  74. GRB 140623A / iPTF14cyb: Fermi GBM detection
  75. GRB 140621A: Fermi GBM detection
  76. IPN Triangulation of GRB 140621A
  77. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  78. GRB 140620A / iPTF14cva: Konkoly optical observations
  79. GRB 140620A: Swift/UVOT Detection
  80. GRB 140606B / iPTF 14bfu: SAO RAS optical observations
  81. GRB 140620A: Swift-XRT observations
  82. GRB 140620A / iPTF14cva: Fermi GBM observations
  83. Fermi 424934131 / iPTF14cva: Discovery and Redshift of Optical Afterglow
  84. GRB 140619B: Swift-XRT observations
  85. GRB 140619B: Fermi-LAT Detection
  86. GRB 140619B: Fermi GBM detection of a short GRB
  87. GRB 140610A: Fermi GBM Detection
  88. Konus-Wind observation of GRB 140606B
  89. GRB 140606B: Swift XRT refined analysis
  90. IPN Triangulation of GRB 140606B
  91. GRB 140606B: Swift/UVOT Upper Limits
  92. GRB140606B/iPTF14bfu: Discovery Channel Telescope Optical Detection
  93. GRB 140606B: Swift XRT position
  94. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  95. GRB 140606B: Fermi GBM detection
  96. Fermi 423717114: Additional P48 and P60 observations
  97. Fermi423717114: iPTF optical transient candidates
  98. GRB 140523A: further Swift-XRT observations
  99. GRB 140528A: Fermi GBM Detection
  100. IPN Triangulation of GRB 140528A

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