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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"

26517 results found.

  1. GRB 080905: R & I-band optical observations
  2. GRB 080905: Swift detection of a probably-short burst
  3. GRB 080903: Swift-XRT Refined Analysis
  4. GRB 080903: Enhanced Swift-XRT position
  5. GRB 080903, Swift-BAT refined analysis
  6. GRB 080903: Liverpool Telescope observations
  7. GRB 080903: TAROT Calern observatory optical observations
  8. GRB 080903: Swift detection of a burst
  9. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  10. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  11. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  12. SGR 0501+4516: Confirmation of the NIR counterpart
  13. GRB080828: Swift/UVOT Upper Limits
  14. SGR 0501+4516: Detection of possible optical counterpart
  15. GRB080825B: Swift/UVOT Upper Limits
  16. Radio Detection of SGR 0501+4516: Retraction
  17. Swift trigger 322590: BAT detection of a possible burst
  18. SGR 0501+4516: Decline in Activity
  19. SGR 0501+4516: Proximity to supernova remnant HB9
  20. Enhanced Swift-XRT position of SGR 0501+4516
  21. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  22. GRB080823: Fermi Gamma-ray Burst Monitor detection
  23. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  24. Konus-Wind observation of GRB 080825B
  25. GRB080825C: GLAST Burst Monitor detection
  26. GRB 080825B: Swift-XRT team analysis
  27. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  28. GRB080825: Afterglow confirmation and redshift estimate
  29. GRB 080825B: GRB Localization by SuperAGILE
  30. Konus-Wind observations of new SGR 0501+4516
  31. Radio Detection of SGR 0501+4516
  32. SGR 0501+4516: MDM Optical Observations
  33. GRB 080822B, Swift-BAT refined analysis
  34. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  35. GRB 080822B: MASTER optical observation
  36. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  37. SGR 0501+4516: optical observations
  38. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  39. GRB 080822B: Swift detection of a burst
  40. GRB 080822 (SGR 0501+4516): archival optical observations
  41. GRB 080822: Swift detection of a short burst
  42. GLAST Burst Monitor detection of GRB 080818
  43. GLAST Burst Monitor detection of GRB080816
  44. GRB080810 - optical observations
  45. Radio detection of GRB 080810 with the VLA
  46. GRB 080810: RTT150 optical observations
  47. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  48. GLAST Burst Monitor detection of GRB 080810
  49. GRB 080810: RTT150 optical observations
  50. GRB 080810: Swift/UVOT Refined Analysis
  51. GRB 080810: optical observations
  52. GRB 080810: Liverpool Telescope observations
  53. GRB 080810: D50 optical observation
  54. GRB 080810: Kanazawa optical observation
  55. GRB 080810: OSN follow-up
  56. GRB 080810: Observations from NOT
  57. GRB 080810: RTT150 optical observations
  58. GRB 080810: Swift-XRT Team refined analysis
  59. GRB 080810: Enhanced Swift-XRT position
  60. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  61. GRB 080810, Swift-BAT refined analysis
  62. GRB 080810: Swift detection of a burst with a bright optical afterglow
  63. GRB 080723B: GROND upper limits
  64. GRB 080723B: XMM-Newton observation
  65. GRB 080805: Faulkes Telescope South optical observations
  66. GRB 080804: GROND observations
  67. GRB 080805: Swift-XRT Refined Analysis
  68. GRB 080805: Swift/UVOT Upper Limits
  69. GRB 080804: Swift/UVOT Refined Analysis
  70. GRB 080805, Swift-BAT refined analysis
  71. GRB 080804, Swift-BAT refined analysis
  72. GRB 080804: Enhanced Swift-XRT position
  73. GRB080804: Gemini South redshift confirmation
  74. GRB 080804: Faulkes Telescope South observations
  75. GRB080805 optical limit by "Pi of the Sky"
  76. GRB 080805: Afterglow confirmation
  77. GRB 080805: Swift detection of a burst
  78. GRB 080804: Swift detection of a burst with optical afterglow
  79. GRB 080802: Swift-XRT Refined Analysis
  80. GRB 080802: UVI Telescope Upper Limit
  81. GRB 080802, Swift-BAT refined analysis
  82. GRB 080727C: Suzaku WAM observation of the prompt emission
  83. GRB 080727B: IR photometry
  84. GRB 080727C: TAROT Calern observatory optical observations
  85. GRB 080727B: KAIT photometry and an early lightcurve break
  86. GRB 080727B: GROND redshift limit
  87. GRB 080727C, Swift-BAT refined analysis
  88. Konus-Wind observation of GRB 080727B
  89. GRB 080727C: Liverpool Telescope observations
  90. GRB 080727C: Enhanced Swift-XRT position
  91. GRB 080727B: REM NIR afterglow prompt detection
  92. GRB080727C: RTT150 optical observations
  93. GRB 080727C: Swift detection of a burst
  94. Swift detection of XTE J1701-407
  95. GRB 080727B: Swift-XRT refined analysis
  96. GRB 080727B, Swift-BAT refined analysis
  97. GRB 080727A, Swift-BAT refined analysis
  98. GRB 080727A: Swift-XRT refined analysis
  99. GRB 080727B: Enhanced Swift-XRT position
  100. GRB 080727A: Enhanced Swift-XRT position

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