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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"

36380 results found.

  1. GRB 110812A: SuperAGILE localization of a long GRB.
  2. Reprocessed enhanced Swift-XRT positions and GRB products: update
  3. SGR 1834.9-0846/ GRB 110807A, I-band observations
  4. Konus-Wind observation of GRB 110808B
  5. Konus-Wind observation of GRB 110808A
  6. IPN triangulation of GRB 110808B (short/hard/intense)
  7. A new photometric resource for GRB observers
  8. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  9. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  10. GRB 110808A: Swift/UVOT Detection
  11. Swift Trigger 458942 is probably not a burst
  12. GRB 110808A: Swift-BAT refined analysis
  13. GRB 110808A: Swift-XRT refined Analysis
  14. SGR J1834.9-0846: A Neutron Star in W41?
  15. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  16. GRB 110808A: VLT/X-shooter spectroscopy
  17. GRB 110808A: Enhanced Swift-XRT position
  18. GRB 110808A: Swift detection of a burst with optical counterpart
  19. GRB 110807A: SAO RAS observations
  20. GRB 110807A: Swift detection of a burst or a posible new SGR
  21. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  22. GRB 110726A: two epochs of SAO RAS optical observations
  23. Reprocessed enhanced Swift-XRT positions and GRB products
  24. Konus-Wind observation of GRB 110802A
  25. Fermi GBM trigger 334123030 (110804165) is not a GRB
  26. IPN triangulation of GRB110802A (short/hard burst)
  27. GRB 110801A: optical observations in CrAO
  28. EVLA observation for Fermi burst GRB 110721A
  29. GRB 110731A : Suzaku WAM observation of the prompt emission
  30. GRB 110726A: Swift-XRT refined Analysis
  31. GRB 110801A: SAO RAS optical observations
  32. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  33. GRB 110801A: Evidence for a jet break
  34. GRB 110801A: MASTER OT observations
  35. GRB 110801A: Swift-BAT refined analysis
  36. Swift/UVOT observations of GRB110801A
  37. GRB 110801A: Swift-XRT refined Analysis
  38. GRB 110801A: Afterglow redshift from 10.4m GTC
  39. GRB110801A: MITSuME Ishigakijima Optical Observation
  40. GRB 110801A: Enhanced Swift-XRT position
  41. AXP 4U 0142+61: Fermi GBM detection
  42. GRB 110801A: TLS Optical afterglow confirmation
  43. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  44. GRB 110801A: Swift detection of a burst with an optical counterpart
  45. GRB 110731A / EVLA upper limits
  46. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  47. GRB 110731A Gemini-N redshift
  48. GRB 110731A: Swift-XRT refined Analysis
  49. Konus-Wind observation of GRB 110731A
  50. GRB110731A: Swift/UVOT Observations
  51. GRB 110731A: Fermi GBM observation
  52. GRB 110731A: NOT photometry
  53. GRB 110731A: Enhanced Swift-XRT position
  54. Fermi-LAT Detection of GRB110731A
  55. GRB 110731A: Swift-BAT refined analysis
  56. GRB 110731A: FTN+FTS afterglow observations
  57. GRB 110731A: Swift detection of a burst with an optical counterpart
  58. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  59. GRB 110721A: Swift observations of afterglow candidate
  60. GRB 110726A: optical upper limit in CrAO
  61. GRB 110726A: EVLA observations
  62. GRB 110726A: IAC80 R-band observations
  63. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  64. GRB110726A: MITSuME Ishigakijima Optical Observation
  65. GRB 110726A: Further Swift/UVOT Observations
  66. GRB110726A: Gemini-N tentative redshift
  67. GRB 110726A: Swift-BAT refined analysis
  68. GRB 110726A: Enhanced Swift-XRT position
  69. GRB 110726A: Swift/UVOT Detection
  70. GRB 110726A: Liverpool Telescope observations
  71. GRB 110726: ROTSE-III Detection of Optical Counterpart
  72. GRB 110726A: Swift detection of a burst
  73. IPN triangulation of GRB 110721A
  74. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  75. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  76. GRB 110721A: potential counterpart candidate
  77. Konus-Wind observation of GRB 110721A
  78. GRB 110709B / EVLA detection of radio counterpart
  79. GRB 110719A / SMA 345 GHz upper limits
  80. GRB 110721A: Fermi-LAT detection
  81. GRB 110721A: Fermi GBM detection
  82. GRB110715A: spectral lag analysis
  83. GRB 110715A : Suzaku WAM observation of the prompt emission
  84. GRB 110719A: GRT Optical Observation
  85. GRB 110719A: optical limit by "Pi of the Sky"
  86. GRB 110719A: z-band upper limit
  87. Swift/UVOT observations of GRB110719A
  88. GRB 110719A: Swift-XRT refined Analysis
  89. GRB 110719A: optical upper limit
  90. GRB 110719A: Enhanced Swift-XRT position
  91. GRB 110719A: Swift-BAT refined analysis
  92. GRB 110715A optical observations
  93. GRB 110719A: Swift detection of a burst
  94. GRB 110709B : Suzaku WAM observation of the prompt emission
  95. GRB 110715A: ATCA detection of the radio counterpart
  96. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  97. GRB 110715A: APEX detection of the submm counterpart
  98. Konus-Wind observation of GRB 110715A
  99. GRB 110715A: Swift-XRT refined Analysis
  100. GRB110715A: VLT redshift

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