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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"

37729 results found.

  1. GRB 110820A: i-band finding chart + correction to 12295
  2. GRB 110820A: CQUEAN izY Observation
  3. GRB 110820A: Swift-XRT refined Analysis
  4. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  5. GRB 110820A: Swift-BAT refined analysis
  6. GRB 110820A: Enhanced Swift-XRT position
  7. GRB 110820A: CrAO optical upper limit
  8. GRB 110820A: MASTER-NET observations
  9. GRB 110820A: Swift detection of a burst
  10. GRB 110818A: Fermi GBM observation
  11. GRB 110818A: Swift/UVOT Upper Limits
  12. GRB 110818A: Enhanced Swift-XRT position
  13. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  14. GRB 110818A: Swift-XRT refined Analysis
  15. GRB 110815A: Swift-XRT and UVOT refined Analysis
  16. GRB 110818A, Swift-BAT refined analysis
  17. GRB 110815A : Suzaku WAM observation of the prompt emission
  18. GRB 110818A: Swift detection of a burst
  19. Konus-Wind observation of GRB 110815A
  20. IPN triangulation of GRB110815A (long, intense)
  21. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  22. GRB 110801A: optical observations at Mt. Terskol observatory
  23. GRB 110812A: SuperAGILE localization of a long GRB.
  24. Reprocessed enhanced Swift-XRT positions and GRB products: update
  25. SGR 1834.9-0846/ GRB 110807A, I-band observations
  26. Konus-Wind observation of GRB 110808B
  27. Konus-Wind observation of GRB 110808A
  28. IPN triangulation of GRB 110808B (short/hard/intense)
  29. A new photometric resource for GRB observers
  30. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  31. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  32. GRB 110808A: Swift/UVOT Detection
  33. Swift Trigger 458942 is probably not a burst
  34. GRB 110808A: Swift-BAT refined analysis
  35. GRB 110808A: Swift-XRT refined Analysis
  36. SGR J1834.9-0846: A Neutron Star in W41?
  37. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  38. GRB 110808A: VLT/X-shooter spectroscopy
  39. GRB 110808A: Enhanced Swift-XRT position
  40. GRB 110808A: Swift detection of a burst with optical counterpart
  41. Fermi GBM detection of a SGR-like burst
  42. GRB 110807A: SAO RAS observations
  43. GRB 110807A: Swift detection of a burst or a posible new SGR
  44. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  45. GRB 110726A: two epochs of SAO RAS optical observations
  46. Reprocessed enhanced Swift-XRT positions and GRB products
  47. Konus-Wind observation of GRB 110802A
  48. Fermi GBM trigger 334123030 (110804165) is not a GRB
  49. IPN triangulation of GRB110802A (short/hard burst)
  50. GRB 110801A: optical observations in CrAO
  51. EVLA observation for Fermi burst GRB 110721A
  52. GRB 110731A : Suzaku WAM observation of the prompt emission
  53. GRB 110726A: Swift-XRT refined Analysis
  54. GRB 110801A: SAO RAS optical observations
  55. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  56. GRB 110801A: Evidence for a jet break
  57. GRB 110801A: MASTER OT observations
  58. GRB 110801A: Swift-BAT refined analysis
  59. Swift/UVOT observations of GRB110801A
  60. GRB 110801A: Swift-XRT refined Analysis
  61. GRB 110801A: Afterglow redshift from 10.4m GTC
  62. GRB110801A: MITSuME Ishigakijima Optical Observation
  63. GRB 110801A: Enhanced Swift-XRT position
  64. AXP 4U 0142+61: Fermi GBM detection
  65. GRB 110801A: TLS Optical afterglow confirmation
  66. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  67. GRB 110801A: Swift detection of a burst with an optical counterpart
  68. GRB 110731A / EVLA upper limits
  69. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  70. GRB 110731A Gemini-N redshift
  71. GRB 110731A: Swift-XRT refined Analysis
  72. Konus-Wind observation of GRB 110731A
  73. GRB110731A: Swift/UVOT Observations
  74. GRB 110731A: Fermi GBM observation
  75. GRB 110731A: NOT photometry
  76. GRB 110731A: Enhanced Swift-XRT position
  77. Fermi-LAT Detection of GRB110731A
  78. GRB 110731A: Swift-BAT refined analysis
  79. GRB 110731A: FTN+FTS afterglow observations
  80. GRB 110731A: Swift detection of a burst with an optical counterpart
  81. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  82. GRB 110721A: Swift observations of afterglow candidate
  83. GRB 110726A: optical upper limit in CrAO
  84. GRB 110726A: EVLA observations
  85. GRB 110726A: IAC80 R-band observations
  86. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  87. GRB110726A: MITSuME Ishigakijima Optical Observation
  88. GRB 110726A: Further Swift/UVOT Observations
  89. GRB110726A: Gemini-N tentative redshift
  90. GRB 110726A: Swift-BAT refined analysis
  91. GRB 110726A: Enhanced Swift-XRT position
  92. GRB 110726A: Swift/UVOT Detection
  93. GRB 110726A: Liverpool Telescope observations
  94. GRB 110726: ROTSE-III Detection of Optical Counterpart
  95. GRB 110726A: Swift detection of a burst
  96. IPN triangulation of GRB 110721A
  97. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  98. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  99. GRB 110721A: potential counterpart candidate
  100. Konus-Wind observation of GRB 110721A

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