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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"

42875 results found.

  1. GRB 060717: Swift XRT refined analysis
  2. GRB 060714: OA fading and a possible host detection
  3. GRB 060717: NOT observations
  4. GRB 060714: Refined analysis of the Swift-BAT burst
  5. GRB060717: Swift/UVOT upper limits
  6. GRB 060717: Swift XRT refined position
  7. GRB 060717: Swift-BAT refined analysis
  8. GRB060717 - SDSS Pre-burst Observations
  9. GRB 060714: REM infrared observations
  10. GRB 060717: Swift detection of a burst
  11. GRB 060714, SMARTS optical/IR afterglow observation
  12. GRB 060714 : Liverpool Telescope Observations
  13. GRB 060714: Swift XRT refined analysis
  14. GRB 060714: OA redshift
  15. GRB 060708: VLT spectroscopy
  16. GRB060708: MARGE low resolution spectrum observations
  17. GRB060714: optical observations
  18. GRB060707 possible optical confirmation
  19. Swift trigger 219136 is probably not a GRB
  20. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  21. GRB 060605: SkyNet Optical Limits
  22. GRB060712: P60 Observations
  23. GRB060526: optical observations
  24. GRB 060712: XRT refined position
  25. GRB 060712: Refined analysis of the Swift-BAT burst
  26. GRB060712: MASTER optical observation
  27. GRB120706: MASTER optical observation
  28. GRB 060712: Swift detection of a burst
  29. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  30. GRB 060708: PROMPT Optical Limits
  31. GRB 060707: OA fading and redshift
  32. GRB 060708: Swift-XRT refined analysis
  33. GCN 060708: Swift-UVOT Observations
  34. GRB 060708: Refined analysis of the Swift-BAT burst
  35. GCN 060707: Swift-UVOT observations
  36. GRB 060707: Swift-XRT refined analysis
  37. GRB 060708: Swift detection of a burst with an UVOT countpart
  38. GRB060707 possible optical confirmation
  39. GRB 060707: BOOTES-IR optical afterglow candidate
  40. GRB 060707: Refined analysis of the Swift-BAT burst
  41. GRB 060707: BOOTES-IR optical observation
  42. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  43. GRB 060707: Swift detection of a burst
  44. GRB 060515: Upper Limit on Host Galaxy
  45. GRB 050223: Magellan redshift
  46. GRB 060614: SMARTS host galaxy observations
  47. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  48. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  49. GRB 060109: Upper Limit on Host Galaxy
  50. GRB 060105: Upper limit on Host Galaxy
  51. GRB060614: Detection of the host galaxy but no supernova emission
  52. GRB 060614: Redshift
  53. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  54. GRB060614: Optical observations
  55. GRB 060614: spectroscopy
  56. GRB050326: Host Galaxy Candidates
  57. GRB050124: Possible Host Galaxy
  58. GRB050223: Host Galaxy
  59. GRB060512: near IR observations
  60. GRB060526: optical observations
  61. Konus-Wind observation of GRB 060614
  62. GRB060605: optical observation
  63. The Unusually Long-Lived Afterglow of GRB 060614
  64. GRB 060614: optical observations
  65. GRB 060605, optical observations
  66. GRB 060614, SMARTS optical/IR afterglow observation
  67. GRB060614: SSO 1m observations
  68. GRB060614: Watcher observation
  69. GRB 060614: Swift-BAT refined analysis
  70. GRB 060614: Swift/UVOT Observations
  71. GRB060614: Swift-XRT refined analysis
  72. GRB 060604, optical observations
  73. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  74. GRB 060602A: Swift/XRT analysis
  75. BAT Trigger #214277 is SGR 1900+14
  76. GRB 060610: KAIT observations
  77. GRB 070706B: Watcher upper limit
  78. GRB 060607B: Swift-BAT Refined Analysis
  79. GRB060602A: Swift/UVOT upper limits
  80. GRB 060607B: Swift detection of a burst
  81. GCN 060607: Swift-UVOT obswervations.
  82. GRB 060607: Swift-BAT Refined Analysis
  83. GRB 060607: optical limit by "Pi of the Sky"
  84. GRB 060607: IR observations
  85. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  86. VLT/UVES observations of GRB 060607
  87. GRB 060607: PROMPT Observations
  88. GRB 060607: REM NIR afterglow
  89. GRB 060607: Swift detection of a burst with bright optical counterpart
  90. GRB 060522: PROMPT Optical Limits
  91. GRB 060605: Xinglong TNT optical observations
  92. GRB060602B : REM infrared observations
  93. GRB060605: Swift/UVOT detections
  94. GRB 060605: Swift-XRT Team refined analysis
  95. SALT spectroscopy of GRB 060605
  96. GRB 060605: RTT150 optical observations
  97. GRB060605: Spectral Observations and Redshift
  98. GRB 060605: ROTSE-III Optical Counterpart
  99. GRB 060605: Swift detection of a burst with optical counterpart
  100. GRB060604: Swift/UVOT detections

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