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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"

37746 results found.

  1. GRB 080905B: Photometric Redshift for the 2MASS Galaxy
  2. Swift trigger 324362 (LS I +61 303 ?)
  3. GRB080905A: Swift/UVOT Upper Limits
  4. GRB 080905B: Watcher optical detection
  5. GRB 080904: Fermi Gamma-ray Burst Monitor detection
  6. GRB 080905B: Fermi Gamma-ray Burst Monitor detection
  7. GRB 080905A: Fermi Gamma-ray Burst Monitor detection
  8. GRB 080905A: Enhanced Swift-XRT position
  9. GRB 080905A: MITSuME Akeno optical upper limits
  10. Swift Trigger 324116 is known source again
  11. Swift Trigger 324112 is known source Swift J1842.5-1124
  12. GRB 080906: Refined Swift/UVOT Observations
  13. GRB 080906: Swift-XRT Refined Analysis
  14. GRB 080906, Swift-BAT refined analysis
  15. GRB 080905A: optical afterglow
  16. GRB 080906: GROND observations of the optical/NIR afterglow
  17. GRB 080905B: Swift-XRT Refined Analysis
  18. GRB 080905B: Refined UVOT Analysis
  19. GRB 080905B: VLT redshift
  20. GRB 080905A: NOT and VLT observations
  21. GRB 080905B: Enhanced Swift-XRT position
  22. GRB 080905B, Swift-BAT refined analysis
  23. GRB 080905A, Swift-BAT refined analysis
  24. GRB 080906: Swift detection of a burst with optical afterglow
  25. GRB 080905A: Swift-XRT Refined Analysis
  26. GRB 080825C: Fermi GBM Spectral Analysis
  27. GRB080825C: Fermi-LAT observations
  28. GRB 080905B: Swift detection of a burst with possible optical counterpart
  29. GRB 080905: R & I-band optical observations
  30. GRB 080905: Swift detection of a probably-short burst
  31. GRB 080903: Swift/UVOT Observations
  32. GRB 080903: Swift-XRT Refined Analysis
  33. GRB 080903: Enhanced Swift-XRT position
  34. GRB 080903, Swift-BAT refined analysis
  35. GRB 080903: optical observations
  36. GRB 080903: Liverpool Telescope observations
  37. GRB 080903: Astrotel-Caucasus optical observations
  38. GRB 080903: Optical afterglow candidate
  39. GRB 080903: TAROT Calern observatory optical observations
  40. GRB 080903: ROTSE-III Optical Limits
  41. GRB 080903: Swift detection of a burst
  42. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  43. GRB080828: Swift/UVOT Upper Limits
  44. GRB080825B: Swift/UVOT Upper Limits
  45. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  46. Swift-BAT trigger 322590 is not a GRB
  47. Swift trigger 322590: BAT detection of a possible burst
  48. GRB 080828: SuperAGILE GRB Localization
  49. GRB080823: Fermi Gamma-ray Burst Monitor detection
  50. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  51. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  52. Konus-Wind observation of GRB 080825B
  53. GRB080825C: GLAST Burst Monitor detection
  54. GRB 080825B: Swift-XRT team analysis
  55. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  56. GRB080825: Afterglow confirmation and redshift estimate
  57. GRB 080825B - optical counterpart candidate
  58. GRB 080825B: GRB Localization by SuperAGILE
  59. GRB 080822B, Swift-BAT refined analysis
  60. GRB 080822B: MASTER optical observation
  61. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  62. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  63. GRB 080822B: Swift detection of a burst
  64. GRB080818B: GLAST Burst Monitor detection
  65. GRB 080822 (SGR 0501+4516): archival optical observations
  66. New Soft Gamma Repeater 0501+4516 was GRB 080822
  67. GRB 080822: Swift detection of a short burst
  68. GLAST Burst Monitor detection of a GRB: 080816B
  69. GLAST Burst Monitor detection of GRB 080818
  70. GLAST Burst Monitor detection of GRB080817B
  71. GLAST Burst Monitor detection of GRB 080817
  72. GLAST Burst Monitor detection of GRB080816
  73. GRB080810 - optical observations
  74. GRB080810: optical observations
  75. GLAST Burst Monitor detection of GRB 080812
  76. Radio detection of GRB 080810 with the VLA
  77. GRB 080810: RTT150 optical observations
  78. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  79. GLAST Burst Monitor detection of GRB 080810
  80. GRB 080810: Liverpool and Faulkes North observations
  81. GRB 080810: RTT150 optical observations
  82. GRB080810: MITSuME optical observation
  83. First GLAST Burst Monitor GRB Circulars
  84. GRB 080810: Swift/UVOT Refined Analysis
  85. GRB 080810: optical observations
  86. GRB 080810: Liverpool Telescope observations
  87. GRB 080810: D50 optical observation
  88. GRB 080810: Kanazawa optical observation
  89. GRB 080810: OSN follow-up
  90. GRB 080810: Observations from NOT
  91. GRB 080810: RTT150 optical observations
  92. GRB 080810: Swift-XRT Team refined analysis
  93. GRB 080810: Enhanced Swift-XRT position
  94. GRB 080810: KANATA optical-NIR observation, update
  95. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  96. GRB 080810: Keck/HIRES Spectroscopy
  97. GRB 080810, Swift-BAT refined analysis
  98. GRB 080810 : optical observation with KANATA
  99. GRB 080810: Swift detection of a burst with a bright optical afterglow
  100. GRB 080723B: GROND upper limits

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