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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"

36221 results found.

  1. Konus-Wind observation of GRB 110903A
  2. GRB 110903A: a long GRB detected by INTEGRAL
  3. GRB 110820A: optical upper limit
  4. GRB110825A: Fermi GBM observation
  5. GRB 110825A: Suzaku WAM observation of the prompt emission
  6. GRB 110825A: GMG optical observation
  7. GRB110825A: ROTSE early time optical limit
  8. GRB 110827A, Swift-BAT refined analysis
  9. GRB 110825A: optical afterglow candidate
  10. GRB 110827A: Swift detection of a burst
  11. GRB 110825A: field inspection and possible host galaxy
  12. IPN triangulation of GRB110825A (very intense, long-duration)
  13. GRB 110820A, the review of the sky area in plate archives
  14. Fermi GBM trigger 110823.518 is not a GRB
  15. Konus-Wind observation of GRB 110820B
  16. GRB 110820A: MASTER-NET first hour observations
  17. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  18. GRB 110820A: Swift/UVOT Upper Limits
  19. GRB 110820A: Position udpate + 2nd epoch data
  20. GRB 110820A: i-band finding chart + correction to 12295
  21. GRB 110820A: CQUEAN izY Observation
  22. GRB 110820A: Swift-XRT refined Analysis
  23. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  24. GRB 110820A: Swift-BAT refined analysis
  25. GRB 110820A: Enhanced Swift-XRT position
  26. GRB 110820A: CrAO optical upper limit
  27. GRB 110820A: MASTER-NET observations
  28. GRB 110820A: Swift detection of a burst
  29. GRB 110818A: Fermi GBM observation
  30. GRB 110818A: Swift/UVOT Upper Limits
  31. GRB 110818A: Enhanced Swift-XRT position
  32. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  33. GRB 110818A: Swift-XRT refined Analysis
  34. GRB 110815A: Swift-XRT and UVOT refined Analysis
  35. GRB 110818A, Swift-BAT refined analysis
  36. GRB 110815A : Suzaku WAM observation of the prompt emission
  37. GRB 110818A: Swift detection of a burst
  38. Konus-Wind observation of GRB 110815A
  39. IPN triangulation of GRB110815A (long, intense)
  40. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  41. GRB 110801A: optical observations at Mt. Terskol observatory
  42. GRB 110812A: SuperAGILE localization of a long GRB.
  43. Reprocessed enhanced Swift-XRT positions and GRB products: update
  44. SGR 1834.9-0846/ GRB 110807A, I-band observations
  45. Konus-Wind observation of GRB 110808B
  46. Konus-Wind observation of GRB 110808A
  47. IPN triangulation of GRB 110808B (short/hard/intense)
  48. A new photometric resource for GRB observers
  49. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  50. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  51. GRB 110808A: Swift/UVOT Detection
  52. Swift Trigger 458942 is probably not a burst
  53. GRB 110808A: Swift-BAT refined analysis
  54. GRB 110808A: Swift-XRT refined Analysis
  55. SGR J1834.9-0846: A Neutron Star in W41?
  56. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  57. GRB 110808A: VLT/X-shooter spectroscopy
  58. GRB 110808A: Enhanced Swift-XRT position
  59. GRB 110808A: Swift detection of a burst with optical counterpart
  60. GRB 110807A: SAO RAS observations
  61. GRB 110807A: Swift detection of a burst or a posible new SGR
  62. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  63. GRB 110726A: two epochs of SAO RAS optical observations
  64. Reprocessed enhanced Swift-XRT positions and GRB products
  65. Konus-Wind observation of GRB 110802A
  66. Fermi GBM trigger 334123030 (110804165) is not a GRB
  67. IPN triangulation of GRB110802A (short/hard burst)
  68. GRB 110801A: optical observations in CrAO
  69. EVLA observation for Fermi burst GRB 110721A
  70. GRB 110731A : Suzaku WAM observation of the prompt emission
  71. GRB 110726A: Swift-XRT refined Analysis
  72. GRB 110801A: SAO RAS optical observations
  73. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  74. GRB 110801A: Evidence for a jet break
  75. GRB 110801A: MASTER OT observations
  76. GRB 110801A: Swift-BAT refined analysis
  77. Swift/UVOT observations of GRB110801A
  78. GRB 110801A: Swift-XRT refined Analysis
  79. GRB 110801A: Afterglow redshift from 10.4m GTC
  80. GRB110801A: MITSuME Ishigakijima Optical Observation
  81. GRB 110801A: Enhanced Swift-XRT position
  82. AXP 4U 0142+61: Fermi GBM detection
  83. GRB 110801A: TLS Optical afterglow confirmation
  84. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  85. GRB 110801A: Swift detection of a burst with an optical counterpart
  86. GRB 110731A / EVLA upper limits
  87. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  88. GRB 110731A Gemini-N redshift
  89. GRB 110731A: Swift-XRT refined Analysis
  90. Konus-Wind observation of GRB 110731A
  91. GRB110731A: Swift/UVOT Observations
  92. GRB 110731A: Fermi GBM observation
  93. GRB 110731A: NOT photometry
  94. GRB 110731A: Enhanced Swift-XRT position
  95. Fermi-LAT Detection of GRB110731A
  96. GRB 110731A: Swift-BAT refined analysis
  97. GRB 110731A: FTN+FTS afterglow observations
  98. GRB 110731A: Swift detection of a burst with an optical counterpart
  99. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  100. GRB 110721A: Swift observations of afterglow candidate

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