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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"

28228 results found.

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

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