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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"

36243 results found.

  1. GRB 080906: Refined Swift/UVOT Observations
  2. GRB 080906: Swift-XRT Refined Analysis
  3. GRB 080906, Swift-BAT refined analysis
  4. GRB 080905A: optical afterglow
  5. GRB 080906: GROND observations of the optical/NIR afterglow
  6. GRB 080905B: Swift-XRT Refined Analysis
  7. GRB 080905B: Refined UVOT Analysis
  8. GRB 080905B: VLT redshift
  9. GRB 080905A: NOT and VLT observations
  10. GRB 080905B: Enhanced Swift-XRT position
  11. GRB 080905B, Swift-BAT refined analysis
  12. GRB 080905A, Swift-BAT refined analysis
  13. GRB 080906: Swift detection of a burst with optical afterglow
  14. GRB 080905A: Swift-XRT Refined Analysis
  15. GRB 080825C: Fermi GBM Spectral Analysis
  16. GRB 080905B: Swift detection of a burst with possible optical counterpart
  17. GRB 080905: R & I-band optical observations
  18. GRB 080905: Swift detection of a probably-short burst
  19. GRB 080903: Swift/UVOT Observations
  20. GRB 080903: Swift-XRT Refined Analysis
  21. GRB 080903: Enhanced Swift-XRT position
  22. GRB 080903, Swift-BAT refined analysis
  23. GRB 080903: optical observations
  24. GRB 080903: Liverpool Telescope observations
  25. GRB 080903: Astrotel-Caucasus optical observations
  26. GRB 080903: Optical afterglow candidate
  27. GRB 080903: TAROT Calern observatory optical observations
  28. GRB 080903: ROTSE-III Optical Limits
  29. GRB 080903: Swift detection of a burst
  30. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  31. GRB080828: Swift/UVOT Upper Limits
  32. GRB080825B: Swift/UVOT Upper Limits
  33. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  34. Swift-BAT trigger 322590 is not a GRB
  35. Swift trigger 322590: BAT detection of a possible burst
  36. GRB 080828: SuperAGILE GRB Localization
  37. GRB080823: Fermi Gamma-ray Burst Monitor detection
  38. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  39. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  40. Konus-Wind observation of GRB 080825B
  41. GRB080825C: GLAST Burst Monitor detection
  42. GRB 080825B: Swift-XRT team analysis
  43. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  44. GRB080825: Afterglow confirmation and redshift estimate
  45. GRB 080825B - optical counterpart candidate
  46. GRB 080825B: GRB Localization by SuperAGILE
  47. GRB 080822B, Swift-BAT refined analysis
  48. GRB 080822B: MASTER optical observation
  49. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  50. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  51. GRB 080822B: Swift detection of a burst
  52. GRB080818B: GLAST Burst Monitor detection
  53. GRB 080822 (SGR 0501+4516): archival optical observations
  54. New Soft Gamma Repeater 0501+4516 was GRB 080822
  55. GRB 080822: Swift detection of a short burst
  56. GLAST Burst Monitor detection of a GRB: 080816B
  57. GLAST Burst Monitor detection of GRB 080818
  58. GLAST Burst Monitor detection of GRB080817B
  59. GLAST Burst Monitor detection of GRB 080817
  60. GLAST Burst Monitor detection of GRB080816
  61. GRB080810 - optical observations
  62. GRB080810: optical observations
  63. GLAST Burst Monitor detection of GRB 080812
  64. Radio detection of GRB 080810 with the VLA
  65. GRB 080810: RTT150 optical observations
  66. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  67. GLAST Burst Monitor detection of GRB 080810
  68. GRB 080810: Liverpool and Faulkes North observations
  69. GRB 080810: RTT150 optical observations
  70. GRB080810: MITSuME optical observation
  71. First GLAST Burst Monitor GRB Circulars
  72. GRB 080810: Swift/UVOT Refined Analysis
  73. GRB 080810: optical observations
  74. GRB 080810: Liverpool Telescope observations
  75. GRB 080810: D50 optical observation
  76. GRB 080810: Kanazawa optical observation
  77. GRB 080810: OSN follow-up
  78. GRB 080810: Observations from NOT
  79. GRB 080810: RTT150 optical observations
  80. GRB 080810: Swift-XRT Team refined analysis
  81. GRB 080810: Enhanced Swift-XRT position
  82. GRB 080810: KANATA optical-NIR observation, update
  83. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  84. GRB 080810: Keck/HIRES Spectroscopy
  85. GRB 080810, Swift-BAT refined analysis
  86. GRB 080810 : optical observation with KANATA
  87. GRB 080810: Swift detection of a burst with a bright optical afterglow
  88. GRB 080723B: GROND upper limits
  89. GRB 080723B: XMM-Newton observation
  90. GRB 080805: VLT redshift update
  91. GRB 080805: Faulkes Telescope South optical observations
  92. GRB 080804: GROND observations
  93. GRB 080727B: Late VLT imaging
  94. GRB 080804: ATCA Radio Observations
  95. GRB 080805: Swift-XRT Refined Analysis
  96. GRB 080805: Swift/UVOT Upper Limits
  97. GRB 080804: Swift-XRT Refined Analysis
  98. GRB 080804: Swift/UVOT Refined Analysis
  99. GRB 080805, Swift-BAT refined analysis
  100. GRB 080804, Swift-BAT refined analysis

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