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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"

36393 results found.

  1. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  2. GRB 060605: SkyNet Optical Limits
  3. GRB060712: P60 Observations
  4. GRB 060712: XRT refined analysis
  5. GRB 060712: Swift/UVOT Upper Limits
  6. GRB060526: optical observations
  7. GRB 060712: XRT refined position
  8. GRB 060712: Refined analysis of the Swift-BAT burst
  9. GRB060712: MASTER optical observation
  10. GRB120706: MASTER optical observation
  11. GRB 060712: Swift detection of a burst
  12. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  13. GRB 060708: PROMPT Optical Limits
  14. GRB 060707: OA fading and redshift
  15. GRB 060708: Swift-XRT refined analysis
  16. GCN 060708: Swift-UVOT Observations
  17. GRB 060708: Refined analysis of the Swift-BAT burst
  18. GCN 060707: Swift-UVOT observations
  19. GRB 060707: Swift-XRT refined analysis
  20. GRB 060708: Swift detection of a burst with an UVOT countpart
  21. GRB060707 possible optical confirmation
  22. GRB 060707: BOOTES-IR optical afterglow candidate
  23. GRB 060707: Refined analysis of the Swift-BAT burst
  24. GRB 060707: BOOTES-IR optical observation
  25. GRB 060707: Swift detection of a burst
  26. GRB 060515: Upper Limit on Host Galaxy
  27. GRB 050223: Magellan redshift
  28. GRB 060614: SMARTS host galaxy observations
  29. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  30. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  31. GRB 060109: Upper Limit on Host Galaxy
  32. GRB 060105: Upper limit on Host Galaxy
  33. GRB060614: Detection of the host galaxy but no supernova emission
  34. GRB 060614: redshift confirmation
  35. GRB 060614: Redshift
  36. Swift-BAT trigger 215279 is not a GRB
  37. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  38. GRB060614: Optical observations
  39. GRB 060614: spectroscopy
  40. GRB050326: Host Galaxy Candidates
  41. GRB050124: Possible Host Galaxy
  42. GRB050223: Host Galaxy
  43. GRB060512: near IR observations
  44. GRB060526: optical observations
  45. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  46. Konus-Wind observation of GRB 060614
  47. GRB060605: optical observation
  48. The Unusually Long-Lived Afterglow of GRB 060614
  49. GRB 060614: optical observations
  50. GRB 060605, optical observations
  51. GRB 060614, SMARTS optical/IR afterglow observation
  52. GRB060614: SSO 1m observations
  53. GRB060614: Watcher observation
  54. GRB 060614: Swift-BAT refined analysis
  55. GRB 060614: Swift/UVOT Observations
  56. GRB 060604, optical observations
  57. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  58. GRB 060602A: Swift/XRT analysis
  59. GRB 060610: KAIT observations
  60. GRB 060607: RTT150 optical observations
  61. GRB 070706B: Watcher upper limit
  62. GRB 060607B: Swift-BAT Refined Analysis
  63. GRB 060607B: Swift detection of a burst
  64. GCN 060607: Swift-UVOT obswervations.
  65. GRB 060607: Swift-BAT Refined Analysis
  66. GRB 060607: optical limit by "Pi of the Sky"
  67. GRB 060607: Swift-XRT Team refined analysis
  68. GRB 060607: IR observations
  69. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  70. VLT/UVES observations of GRB 060607
  71. GRB 060607: PROMPT Observations
  72. GRB 060605: RTT150 optical observations
  73. GRB 060607: REM NIR afterglow
  74. GRB 060607: Swift detection of a burst with bright optical counterpart
  75. GRB 060522: PROMPT Optical Limits
  76. GRB 060605 BAT refined analysis
  77. GRB 060605: Xinglong TNT optical observations
  78. GRB060602B : REM infrared observations
  79. GRB060605: Swift/UVOT detections
  80. GRB 060605: Swift-XRT Team refined analysis
  81. SALT spectroscopy of GRB 060605
  82. GRB 060605: TNG optical observations
  83. GRB 060605: RTT150 optical observations
  84. GRB 060605: ROTSE-III Optical Counterpart
  85. GRB 060605: Swift detection of a burst with optical counterpart
  86. GRB 060605: ROTSE-III Detection of Optical Counterpart
  87. GRB 060604: redshift
  88. GRB 060512: Keck Redshift
  89. GRB 060604 optical photometry
  90. GRB 060604: Swift-XRT Team refined analysis
  91. GRB 060604: BAT refined analysis
  92. GRB 060604A: ROTSE-III Optical Limits
  93. GRB 060604: Swift detection of a burst with possible optical counterpart
  94. GRB 060602A: Swift-BAT Refined Analysis: Correction
  95. GRB 060602B: XMM-Newton Survey Source
  96. GRB 060602B: Swift-XRT Refined Analysis
  97. GRB 060602B: Swift-BAT Refined Analysis
  98. GRB 060602B: Swift/UVOT observations
  99. GRB 060602A: Swift-BAT Refined Analysis
  100. GRB 060602B: RTT150 optical observations

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