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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"

45692 results found.

  1. GRB 110825A: Further Swift/XRT Observations
  2. GRB 110731A: SAO RAS and Terskol observations
  3. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  4. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  5. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  6. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  7. GRB 110905A: KAIT observations
  8. GRB 110905A: Swift detection of a burst
  9. GRB 110903A: Fermi GBM observation
  10. GRB 110903A: Swift/UVOT Upper Limits
  11. GRB 110903A: Swift-XRT observations
  12. Konus-Wind observation of GRB 110903A
  13. GRB 110903A: a long GRB detected by INTEGRAL
  14. GRB 110820A: optical upper limit
  15. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  16. Trigger 502024: Swift detection of KS 1741-293
  17. GRB110825A: Fermi GBM observation
  18. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  19. Swift detection of an SGR burst from Swift J1834.9-0846
  20. GRB 110825A: Suzaku WAM observation of the prompt emission
  21. GRB 110825A: GMG optical observation
  22. GRB110825A: ROTSE early time optical limit
  23. GRB 110827A, Swift-BAT refined analysis
  24. GRB 110825A: optical afterglow candidate
  25. GRB 110827A: Swift detection of a burst
  26. GRB 110825A: field inspection and possible host galaxy
  27. GRB110825A: Swift target of opportunity observation
  28. IPN triangulation of GRB110825A (very intense, long-duration)
  29. GRB 110820A, the review of the sky area in plate archives
  30. Swift-BAT Trigger 501485 is noise
  31. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  32. Fermi GBM trigger 110823.518 is not a GRB
  33. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  34. Konus-Wind observation of GRB 110820B
  35. GRB 110820A: MASTER-NET first hour observations
  36. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  37. GRB 110820A: Swift/UVOT Upper Limits
  38. GRB 110820A: Position udpate + 2nd epoch data
  39. GRB 110820A: i-band finding chart + correction to 12295
  40. GRB 110820A: CQUEAN izY Observation
  41. GRB 110820A: Swift-XRT refined Analysis
  42. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  43. GRB 110820A: Swift-BAT refined analysis
  44. GRB 110820A: Enhanced Swift-XRT position
  45. GRB 110820A: CrAO optical upper limit
  46. GRB 110820A: MASTER-NET observations
  47. GRB 110820A: Swift detection of a burst
  48. GRB 110818A: Fermi GBM observation
  49. GRB 110818A: Swift/UVOT Upper Limits
  50. GRB 110818A: Enhanced Swift-XRT position
  51. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  52. GRB 110818A: Swift-XRT refined Analysis
  53. GRB 110815A: Swift-XRT and UVOT refined Analysis
  54. GRB 110818A, Swift-BAT refined analysis
  55. GRB 110815A : Suzaku WAM observation of the prompt emission
  56. GRB 110818A: Swift detection of a burst
  57. Konus-Wind observation of GRB 110815A
  58. IPN triangulation of GRB110815A (long, intense)
  59. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  60. GRB 110801A: optical observations at Mt. Terskol observatory
  61. GRB 110812A: SuperAGILE localization of a long GRB.
  62. Reprocessed enhanced Swift-XRT positions and GRB products: update
  63. SGR 1834.9-0846/ GRB 110807A, I-band observations
  64. Konus-Wind observation of GRB 110808B
  65. Konus-Wind observation of GRB 110808A
  66. IPN triangulation of GRB 110808B (short/hard/intense)
  67. A new photometric resource for GRB observers
  68. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  69. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  70. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  71. GRB 110808A: Swift/UVOT Detection
  72. Swift Trigger 458942 is probably not a burst
  73. GRB 110808A: Swift-BAT refined analysis
  74. GRB 110808A: Swift-XRT refined Analysis
  75. SGR J1834.9-0846: A Neutron Star in W41?
  76. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  77. GRB 110808A: VLT/X-shooter spectroscopy
  78. GRB 110808A: Enhanced Swift-XRT position
  79. GRB 110808A: Swift detection of a burst with optical counterpart
  80. Fermi GBM detection of a SGR-like burst
  81. GRB 110807A: SAO RAS observations
  82. GRB 110807A: Swift detection of a burst or a posible new SGR
  83. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  84. GRB 110726A: two epochs of SAO RAS optical observations
  85. Reprocessed enhanced Swift-XRT positions and GRB products
  86. Konus-Wind observation of GRB 110802A
  87. Fermi GBM trigger 334123030 (110804165) is not a GRB
  88. IPN triangulation of GRB110802A (short/hard burst)
  89. GRB 110801A: optical observations in CrAO
  90. EVLA observation for Fermi burst GRB 110721A
  91. GRB 110731A : Suzaku WAM observation of the prompt emission
  92. GRB 110726A: Swift-XRT refined Analysis
  93. GRB110731A: MOA optical observations of the steeply fading afterglow
  94. GRB 110801A: SAO RAS optical observations
  95. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  96. GRB 110801A: Evidence for a jet break
  97. GRB 110801A: MASTER OT observations
  98. GRB 110801A: Swift-BAT refined analysis
  99. Swift/UVOT observations of GRB110801A
  100. GRB 110801A: Swift-XRT refined Analysis

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