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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"

42287 results found.

  1. Swift Trigger 324116 is known source again
  2. Swift Trigger 324112 is known source Swift J1842.5-1124
  3. GRB 080906: Refined Swift/UVOT Observations
  4. GRB 080906: Swift-XRT Refined Analysis
  5. GRB 080906, Swift-BAT refined analysis
  6. GRB 080905A: optical afterglow
  7. GRB 080906: GROND observations of the optical/NIR afterglow
  8. GRB 080905B: Swift-XRT Refined Analysis
  9. GRB 080905B: Refined UVOT Analysis
  10. GRB 080905B: VLT redshift
  11. GRB 080905A: NOT and VLT observations
  12. GRB 080905B: Enhanced Swift-XRT position
  13. GRB 080905B, Swift-BAT refined analysis
  14. GRB 080905A, Swift-BAT refined analysis
  15. GRB 080906: Swift detection of a burst with optical afterglow
  16. GRB 080905A: Swift-XRT Refined Analysis
  17. GRB 080825C: Fermi GBM Spectral Analysis
  18. GRB080825C: Fermi-LAT observations
  19. GRB 080905B: Swift detection of a burst with possible optical counterpart
  20. GRB 080905: R & I-band optical observations
  21. GRB 080905: Swift detection of a probably-short burst
  22. GRB 080903: Swift/UVOT Observations
  23. GRB 080903: Swift-XRT Refined Analysis
  24. GRB 080903: Enhanced Swift-XRT position
  25. GRB 080903, Swift-BAT refined analysis
  26. GRB 080903: optical observations
  27. GRB 080903: Liverpool Telescope observations
  28. GRB 080903: Astrotel-Caucasus optical observations
  29. GRB 080903: Optical afterglow candidate
  30. GRB 080903: TAROT Calern observatory optical observations
  31. GRB 080903: ROTSE-III Optical Limits
  32. GRB 080903: Swift detection of a burst
  33. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  34. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  35. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  36. nIR observations of SGR 0501+4516
  37. SGR 0501+4516: Confirmation of the NIR counterpart
  38. SGR 0501+4516: Detection of possible optical counterpart
  39. SGR 0501+4516: WHT observations of the possible near-infrared counterpart
  40. GRB080825B: Swift/UVOT Upper Limits
  41. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  42. Swift-BAT trigger 322590 is not a GRB
  43. Radio Detection of SGR 0501+4516: Retraction
  44. Swift trigger 322590: BAT detection of a possible burst
  45. SGR 0501+4516: XMM-Newton monitoring schedule
  46. GRB 080828: SuperAGILE GRB Localization
  47. SGR 0501+4516: Decline in Activity
  48. SGR 0501+4516: Proximity to supernova remnant HB9
  49. Enhanced Swift-XRT position of SGR 0501+4516
  50. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  51. SGR 0501+4516: Swift XRT measure of the spin period
  52. GRB080823: Fermi Gamma-ray Burst Monitor detection
  53. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  54. Konus-Wind observation of GRB 080825B
  55. GRB080825C: GLAST Burst Monitor detection
  56. GRB 080825B: Swift-XRT team analysis
  57. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  58. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  59. GRB080825: Afterglow confirmation and redshift estimate
  60. GRB 080825B - optical counterpart candidate
  61. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  62. GRB 080825B: GRB Localization by SuperAGILE
  63. Konus-Wind observations of new SGR 0501+4516
  64. INTEGRAL ToO Observation of SGR0501+4516
  65. Radio Detection of SGR 0501+4516
  66. SGR 0501+4516: MDM Optical Observations
  67. GRB 080822B, Swift-BAT refined analysis
  68. SGR 0501+4516: Astrotel-Caucasus optical observations
  69. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  70. SGR 0501+4516: WSRT Radio Observations
  71. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  72. GRB 080822B: MASTER optical observation
  73. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  74. SGR 0501+4516: optical observations
  75. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  76. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  77. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  78. GRB 080822B: Swift detection of a burst
  79. GRB080818B: GLAST Burst Monitor detection
  80. Third event from SGR 0501+4516
  81. GRB 080822 (SGR 0501+4516): archival optical observations
  82. New Soft Gamma Repeater 0501+4516 was GRB 080822
  83. GRB 080822: Swift detection of a short burst
  84. GLAST Burst Monitor detection of a GRB: 080816B
  85. GLAST Burst Monitor detection of GRB 080818
  86. GLAST Burst Monitor detection of GRB080817B
  87. GLAST Burst Monitor detection of GRB 080817
  88. GLAST Burst Monitor detection of GRB080816
  89. GRB080810 - optical observations
  90. GRB080810: optical observations
  91. GLAST Burst Monitor detection of GRB 080812
  92. Radio detection of GRB 080810 with the VLA
  93. GRB 080810: RTT150 optical observations
  94. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  95. GLAST Burst Monitor detection of GRB 080810
  96. GRB 080810: Liverpool and Faulkes North observations
  97. GRB 080810: RTT150 optical observations
  98. GRB080810: MITSuME optical observation
  99. First GLAST Burst Monitor GRB Circulars
  100. GRB 080810: Swift/UVOT Refined Analysis

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