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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"

28230 results found.

  1. GRB 080905A, Swift-BAT refined analysis
  2. GRB 080906: Swift detection of a burst with optical afterglow
  3. GRB 080905A: Swift-XRT Refined Analysis
  4. GRB080825C: Fermi-LAT observations
  5. GRB 080905B: Swift detection of a burst with possible optical counterpart
  6. GRB 080905: Swift detection of a probably-short burst
  7. GRB 080903: Swift/UVOT Observations
  8. GRB 080903: Swift-XRT Refined Analysis
  9. GRB 080903: Enhanced Swift-XRT position
  10. GRB 080903, Swift-BAT refined analysis
  11. GRB 080903: optical observations
  12. GRB 080903: Liverpool Telescope observations
  13. GRB 080903: Optical afterglow candidate
  14. GRB 080903: TAROT Calern observatory optical observations
  15. GRB 080903: Swift detection of a burst
  16. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  17. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  18. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  19. nIR observations of SGR 0501+4516
  20. SGR 0501+4516: Confirmation of the NIR counterpart
  21. GRB080828: Swift/UVOT Upper Limits
  22. SGR 0501+4516: Detection of possible optical counterpart
  23. GRB080825B: Swift/UVOT Upper Limits
  24. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  25. VLA non-detection of SGR 0501+4516
  26. Swift trigger 322590: BAT detection of a possible burst
  27. GRB 080828: SuperAGILE GRB Localization
  28. Enhanced Swift-XRT position of SGR 0501+4516
  29. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  30. GRB080823: Fermi Gamma-ray Burst Monitor detection
  31. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  32. Konus-Wind observation of GRB 080825B
  33. GRB080825C: GLAST Burst Monitor detection
  34. GRB 080825B: Swift-XRT team analysis
  35. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  36. Suzaku ToO Observation of SGR 0501+4516
  37. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  38. GRB 080825B: GRB Localization by SuperAGILE
  39. Radio Detection of SGR 0501+4516
  40. GRB 080822B, Swift-BAT refined analysis
  41. SGR 0501+4516: Astrotel-Caucasus optical observations
  42. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  43. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  44. SGR 0501+4516: optical observations
  45. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  46. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  47. GRB080818B: GLAST Burst Monitor detection
  48. GRB 080822: Swift detection of a short burst
  49. GLAST Burst Monitor detection of a GRB: 080816B
  50. GLAST Burst Monitor detection of GRB 080818
  51. GLAST Burst Monitor detection of GRB080817B
  52. GLAST Burst Monitor detection of GRB 080817
  53. GLAST Burst Monitor detection of GRB080816
  54. GRB080810 - optical observations
  55. GLAST Burst Monitor detection of GRB 080812
  56. Radio detection of GRB 080810 with the VLA
  57. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  58. GLAST Burst Monitor detection of GRB 080810
  59. First GLAST Burst Monitor GRB Circulars
  60. GRB 080810: Swift/UVOT Refined Analysis
  61. GRB 080810: Liverpool Telescope observations
  62. GRB 080810: Kanazawa optical observation
  63. GRB 080810: OSN follow-up
  64. GRB 080810: Swift-XRT Team refined analysis
  65. GRB 080810: Enhanced Swift-XRT position
  66. GRB 080810: KANATA optical-NIR observation, update
  67. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  68. GRB 080810, Swift-BAT refined analysis
  69. GRB 080810 : optical observation with KANATA
  70. GRB 080810: Swift detection of a burst with a bright optical afterglow
  71. GRB 080723B: GROND upper limits
  72. GRB 080723B: XMM-Newton observation
  73. GRB 080805: Faulkes Telescope South optical observations
  74. GRB 080804: GROND observations
  75. GRB 080727B: Late VLT imaging
  76. GRB 080805: Swift-XRT Refined Analysis
  77. GRB 080805: Swift/UVOT Upper Limits
  78. GRB 080804: Swift-XRT Refined Analysis
  79. GRB 080804: Swift/UVOT Refined Analysis
  80. GRB 080805, Swift-BAT refined analysis
  81. GRB 080804, Swift-BAT refined analysis
  82. GRB 080804: Enhanced Swift-XRT position
  83. GRB 080804: Faulkes Telescope South observations
  84. GRB080805 optical limit by "Pi of the Sky"
  85. GRB 080805: Afterglow confirmation
  86. GRB 080805: GROND detection of possible afterglow
  87. GRB 080805: Swift detection of a burst
  88. GRB 080804: Swift detection of a burst with optical afterglow
  89. GRB 080804: ROTSE-III Detection of Optical Counterpart
  90. GRB 080802: Swift/UVOT Upper Limits
  91. GRB 080802: UVI Telescope Upper Limit
  92. GRB 080802, Swift-BAT refined analysis
  93. GRB 080802: Swift detection of a probable burst
  94. GRB 080727C: Suzaku WAM observation of the prompt emission
  95. GRB 080727B: IR photometry
  96. GRB 080727C: TAROT Calern observatory optical observations
  97. GRB 080727B: KAIT photometry and an early lightcurve break
  98. GRB 080727C, Swift-BAT refined analysis
  99. GRB 080727C: Swift/UVOT Upper Limits
  100. GRB 080727C: Swift XRT refined analysis

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