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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"

37766 results found.

  1. GRB 110915B: SuperAGILE localization of a long GRB
  2. GRB 110915A: Enhanced Swift-XRT position
  3. GRB 110915A: GMG optical upper limit
  4. GRB 110915A: MITSuME Akeno Optical upper limits
  5. GRB 110915A: MASTER-Net early limit
  6. GRB 110915A: Prompt enhanced Swift-XRT position
  7. GRB 110915A: Swift detection of a burst
  8. GRB 110825A: Further Swift/XRT Observations
  9. GRB 110731A: SAO RAS and Terskol observations
  10. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  11. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  12. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  13. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  14. GRB 110905A: KAIT observations
  15. GRB 110905A: Swift detection of a burst
  16. GRB 110903A: Fermi GBM observation
  17. GRB 110903A: Swift/UVOT Upper Limits
  18. GRB 110903A: Swift-XRT observations
  19. Konus-Wind observation of GRB 110903A
  20. GRB 110903A: a long GRB detected by INTEGRAL
  21. GRB 110820A: optical upper limit
  22. GRB110825A: Fermi GBM observation
  23. GRB 110825A: Suzaku WAM observation of the prompt emission
  24. GRB 110825A: GMG optical observation
  25. GRB110825A: ROTSE early time optical limit
  26. GRB 110827A, Swift-BAT refined analysis
  27. GRB 110825A: optical afterglow candidate
  28. GRB 110827A: Swift detection of a burst
  29. GRB 110825A: field inspection and possible host galaxy
  30. IPN triangulation of GRB110825A (very intense, long-duration)
  31. GRB 110820A, the review of the sky area in plate archives
  32. Fermi GBM trigger 110823.518 is not a GRB
  33. Konus-Wind observation of GRB 110820B
  34. GRB 110820A: MASTER-NET first hour observations
  35. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  36. GRB 110820A: Swift/UVOT Upper Limits
  37. GRB 110820A: Position udpate + 2nd epoch data
  38. GRB 110820A: i-band finding chart + correction to 12295
  39. GRB 110820A: CQUEAN izY Observation
  40. GRB 110820A: Swift-XRT refined Analysis
  41. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  42. GRB 110820A: Swift-BAT refined analysis
  43. GRB 110820A: Enhanced Swift-XRT position
  44. GRB 110820A: CrAO optical upper limit
  45. GRB 110820A: MASTER-NET observations
  46. GRB 110820A: Swift detection of a burst
  47. GRB 110818A: Fermi GBM observation
  48. GRB 110818A: Swift/UVOT Upper Limits
  49. GRB 110818A: Enhanced Swift-XRT position
  50. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  51. GRB 110818A: Swift-XRT refined Analysis
  52. GRB 110815A: Swift-XRT and UVOT refined Analysis
  53. GRB 110818A, Swift-BAT refined analysis
  54. GRB 110815A : Suzaku WAM observation of the prompt emission
  55. GRB 110818A: Swift detection of a burst
  56. Konus-Wind observation of GRB 110815A
  57. IPN triangulation of GRB110815A (long, intense)
  58. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  59. GRB 110801A: optical observations at Mt. Terskol observatory
  60. GRB 110812A: SuperAGILE localization of a long GRB.
  61. Reprocessed enhanced Swift-XRT positions and GRB products: update
  62. SGR 1834.9-0846/ GRB 110807A, I-band observations
  63. Konus-Wind observation of GRB 110808B
  64. Konus-Wind observation of GRB 110808A
  65. IPN triangulation of GRB 110808B (short/hard/intense)
  66. A new photometric resource for GRB observers
  67. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  68. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  69. GRB 110808A: Swift/UVOT Detection
  70. Swift Trigger 458942 is probably not a burst
  71. GRB 110808A: Swift-BAT refined analysis
  72. GRB 110808A: Swift-XRT refined Analysis
  73. SGR J1834.9-0846: A Neutron Star in W41?
  74. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  75. GRB 110808A: VLT/X-shooter spectroscopy
  76. GRB 110808A: Enhanced Swift-XRT position
  77. GRB 110808A: Swift detection of a burst with optical counterpart
  78. Fermi GBM detection of a SGR-like burst
  79. GRB 110807A: SAO RAS observations
  80. GRB 110807A: Swift detection of a burst or a posible new SGR
  81. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  82. GRB 110726A: two epochs of SAO RAS optical observations
  83. Reprocessed enhanced Swift-XRT positions and GRB products
  84. Konus-Wind observation of GRB 110802A
  85. Fermi GBM trigger 334123030 (110804165) is not a GRB
  86. IPN triangulation of GRB110802A (short/hard burst)
  87. GRB 110801A: optical observations in CrAO
  88. EVLA observation for Fermi burst GRB 110721A
  89. GRB 110731A : Suzaku WAM observation of the prompt emission
  90. GRB 110726A: Swift-XRT refined Analysis
  91. GRB 110801A: SAO RAS optical observations
  92. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  93. GRB 110801A: Evidence for a jet break
  94. GRB 110801A: MASTER OT observations
  95. GRB 110801A: Swift-BAT refined analysis
  96. Swift/UVOT observations of GRB110801A
  97. GRB 110801A: Swift-XRT refined Analysis
  98. GRB 110801A: Afterglow redshift from 10.4m GTC
  99. GRB110801A: MITSuME Ishigakijima Optical Observation
  100. GRB 110801A: Enhanced Swift-XRT position

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