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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"

26516 results found.

  1. GRB 080905: Swift detection of a probably-short burst
  2. GRB 080903: Swift-XRT Refined Analysis
  3. GRB 080903: Enhanced Swift-XRT position
  4. GRB 080903, Swift-BAT refined analysis
  5. GRB 080903: Liverpool Telescope observations
  6. GRB 080903: TAROT Calern observatory optical observations
  7. GRB 080903: Swift detection of a burst
  8. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  9. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  10. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  11. SGR 0501+4516: Confirmation of the NIR counterpart
  12. GRB080828: Swift/UVOT Upper Limits
  13. SGR 0501+4516: Detection of possible optical counterpart
  14. GRB080825B: Swift/UVOT Upper Limits
  15. Radio Detection of SGR 0501+4516: Retraction
  16. Swift trigger 322590: BAT detection of a possible burst
  17. SGR 0501+4516: Decline in Activity
  18. SGR 0501+4516: Proximity to supernova remnant HB9
  19. Enhanced Swift-XRT position of SGR 0501+4516
  20. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  21. GRB080823: Fermi Gamma-ray Burst Monitor detection
  22. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  23. Konus-Wind observation of GRB 080825B
  24. GRB080825C: GLAST Burst Monitor detection
  25. GRB 080825B: Swift-XRT team analysis
  26. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  27. GRB080825: Afterglow confirmation and redshift estimate
  28. GRB 080825B: GRB Localization by SuperAGILE
  29. Konus-Wind observations of new SGR 0501+4516
  30. Radio Detection of SGR 0501+4516
  31. SGR 0501+4516: MDM Optical Observations
  32. GRB 080822B, Swift-BAT refined analysis
  33. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  34. GRB 080822B: MASTER optical observation
  35. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  36. SGR 0501+4516: optical observations
  37. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  38. GRB 080822B: Swift detection of a burst
  39. GRB 080822 (SGR 0501+4516): archival optical observations
  40. GRB 080822: Swift detection of a short burst
  41. GLAST Burst Monitor detection of GRB 080818
  42. GLAST Burst Monitor detection of GRB080816
  43. GRB080810 - optical observations
  44. Radio detection of GRB 080810 with the VLA
  45. GRB 080810: RTT150 optical observations
  46. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  47. GLAST Burst Monitor detection of GRB 080810
  48. GRB 080810: RTT150 optical observations
  49. GRB 080810: Swift/UVOT Refined Analysis
  50. GRB 080810: optical observations
  51. GRB 080810: Liverpool Telescope observations
  52. GRB 080810: D50 optical observation
  53. GRB 080810: Kanazawa optical observation
  54. GRB 080810: OSN follow-up
  55. GRB 080810: Observations from NOT
  56. GRB 080810: RTT150 optical observations
  57. GRB 080810: Swift-XRT Team refined analysis
  58. GRB 080810: Enhanced Swift-XRT position
  59. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  60. GRB 080810, Swift-BAT refined analysis
  61. GRB 080810: Swift detection of a burst with a bright optical afterglow
  62. GRB 080723B: GROND upper limits
  63. GRB 080723B: XMM-Newton observation
  64. GRB 080805: Faulkes Telescope South optical observations
  65. GRB 080804: GROND observations
  66. GRB 080805: Swift-XRT Refined Analysis
  67. GRB 080805: Swift/UVOT Upper Limits
  68. GRB 080804: Swift/UVOT Refined Analysis
  69. GRB 080805, Swift-BAT refined analysis
  70. GRB 080804, Swift-BAT refined analysis
  71. GRB 080804: Enhanced Swift-XRT position
  72. GRB080804: Gemini South redshift confirmation
  73. GRB 080804: Faulkes Telescope South observations
  74. GRB080805 optical limit by "Pi of the Sky"
  75. GRB 080805: Afterglow confirmation
  76. GRB 080805: Swift detection of a burst
  77. GRB 080804: Swift detection of a burst with optical afterglow
  78. GRB 080802: Swift-XRT Refined Analysis
  79. GRB 080802: UVI Telescope Upper Limit
  80. GRB 080802, Swift-BAT refined analysis
  81. GRB 080727C: Suzaku WAM observation of the prompt emission
  82. GRB 080727B: IR photometry
  83. GRB 080727C: TAROT Calern observatory optical observations
  84. GRB 080727B: KAIT photometry and an early lightcurve break
  85. GRB 080727B: GROND redshift limit
  86. GRB 080727C, Swift-BAT refined analysis
  87. Konus-Wind observation of GRB 080727B
  88. GRB 080727C: Liverpool Telescope observations
  89. GRB 080727C: Enhanced Swift-XRT position
  90. GRB 080727B: REM NIR afterglow prompt detection
  91. GRB080727C: RTT150 optical observations
  92. GRB 080727C: Swift detection of a burst
  93. Swift detection of XTE J1701-407
  94. GRB 080727B: Swift-XRT refined analysis
  95. GRB 080727B, Swift-BAT refined analysis
  96. GRB 080727A, Swift-BAT refined analysis
  97. GRB 080727A: Swift-XRT refined analysis
  98. GRB 080727B: Enhanced Swift-XRT position
  99. GRB 080727A: Enhanced Swift-XRT position
  100. GRB 080727B: Swift detection of a bright burst

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