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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"

39371 results found.

  1. GRB 110820A, the review of the sky area in plate archives
  2. Fermi GBM trigger 110823.518 is not a GRB
  3. Konus-Wind observation of GRB 110820B
  4. GRB 110820A: MASTER-NET first hour observations
  5. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  6. GRB 110820A: Swift/UVOT Upper Limits
  7. GRB 110820A: Position udpate + 2nd epoch data
  8. GRB 110820A: i-band finding chart + correction to 12295
  9. GRB 110820A: CQUEAN izY Observation
  10. GRB 110820A: Swift-XRT refined Analysis
  11. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  12. GRB 110820A: Swift-BAT refined analysis
  13. GRB 110820A: Enhanced Swift-XRT position
  14. GRB 110820A: CrAO optical upper limit
  15. GRB 110820A: MASTER-NET observations
  16. GRB 110820A: Swift detection of a burst
  17. GRB 110818A: Fermi GBM observation
  18. GRB 110818A: Swift/UVOT Upper Limits
  19. GRB 110818A: Enhanced Swift-XRT position
  20. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  21. GRB 110818A: Swift-XRT refined Analysis
  22. GRB 110815A: Swift-XRT and UVOT refined Analysis
  23. GRB 110818A, Swift-BAT refined analysis
  24. GRB 110815A : Suzaku WAM observation of the prompt emission
  25. GRB 110818A: Swift detection of a burst
  26. Konus-Wind observation of GRB 110815A
  27. IPN triangulation of GRB110815A (long, intense)
  28. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  29. GRB 110801A: optical observations at Mt. Terskol observatory
  30. GRB 110812A: SuperAGILE localization of a long GRB.
  31. Reprocessed enhanced Swift-XRT positions and GRB products: update
  32. SGR 1834.9-0846/ GRB 110807A, I-band observations
  33. Konus-Wind observation of GRB 110808B
  34. Konus-Wind observation of GRB 110808A
  35. IPN triangulation of GRB 110808B (short/hard/intense)
  36. A new photometric resource for GRB observers
  37. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  38. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  39. GRB 110808A: Swift/UVOT Detection
  40. Swift Trigger 458942 is probably not a burst
  41. GRB 110808A: Swift-BAT refined analysis
  42. GRB 110808A: Swift-XRT refined Analysis
  43. SGR J1834.9-0846: A Neutron Star in W41?
  44. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  45. GRB 110808A: VLT/X-shooter spectroscopy
  46. GRB 110808A: Enhanced Swift-XRT position
  47. GRB 110808A: Swift detection of a burst with optical counterpart
  48. GRB 110807A: SAO RAS observations
  49. GRB 110807A: Swift detection of a burst or a posible new SGR
  50. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  51. GRB 110726A: two epochs of SAO RAS optical observations
  52. Reprocessed enhanced Swift-XRT positions and GRB products
  53. Konus-Wind observation of GRB 110802A
  54. Fermi GBM trigger 334123030 (110804165) is not a GRB
  55. IPN triangulation of GRB110802A (short/hard burst)
  56. GRB 110801A: optical observations in CrAO
  57. EVLA observation for Fermi burst GRB 110721A
  58. GRB 110731A : Suzaku WAM observation of the prompt emission
  59. GRB 110726A: Swift-XRT refined Analysis
  60. GRB110731A: MOA optical observations of the steeply fading afterglow
  61. GRB 110801A: SAO RAS optical observations
  62. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  63. GRB 110801A: Evidence for a jet break
  64. GRB 110801A: MASTER OT observations
  65. GRB 110801A: Swift-BAT refined analysis
  66. Swift/UVOT observations of GRB110801A
  67. GRB 110801A: Swift-XRT refined Analysis
  68. GRB 110801A: Afterglow redshift from 10.4m GTC
  69. GRB110801A: MITSuME Ishigakijima Optical Observation
  70. GRB 110801A: Enhanced Swift-XRT position
  71. AXP 4U 0142+61: Fermi GBM detection
  72. GRB 110801A: TLS Optical afterglow confirmation
  73. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  74. GRB 110801A: Swift detection of a burst with an optical counterpart
  75. GRB 110731A / EVLA upper limits
  76. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  77. GRB 110731A Gemini-N redshift
  78. GRB 110731A: Swift-XRT refined Analysis
  79. Konus-Wind observation of GRB 110731A
  80. GRB110731A: Swift/UVOT Observations
  81. GRB 110731A: Fermi GBM observation
  82. GRB 110731A: NOT photometry
  83. GRB 110731A: Enhanced Swift-XRT position
  84. Fermi-LAT Detection of GRB110731A
  85. GRB 110731A: Swift-BAT refined analysis
  86. GRB 110731A: FTN+FTS afterglow observations
  87. GRB 110731A: Swift detection of a burst with an optical counterpart
  88. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  89. INTEGRAL Weak trigger #6331: GRT Optical Observation
  90. GRB 110721A: Swift observations of afterglow candidate
  91. GRB 110726A: optical upper limit in CrAO
  92. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  93. GRB 110726A: EVLA observations
  94. GRB 110726A: IAC80 R-band observations
  95. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  96. GRB110726A: MITSuME Ishigakijima Optical Observation
  97. GRB 110726A: Further Swift/UVOT Observations
  98. GRB110726A: Gemini-N tentative redshift
  99. GRB 110726A: Swift-BAT refined analysis
  100. GRB 110726A: Enhanced Swift-XRT position

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