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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"

36310 results found.

  1. GRB 060714: REM infrared observations
  2. GRB 060717, optical observation
  3. GRB 060717: Swift detection of a burst
  4. GRB060714: correction to GCN 5324
  5. GRB060714: optical observations
  6. GRB 060714, SMARTS optical/IR afterglow observation
  7. GRB 060714 : Liverpool Telescope Observations
  8. GRB 060714: Swift XRT refined analysis
  9. GRB 060714: OA redshift
  10. GRB 060708: VLT spectroscopy
  11. GRB060708: MARGE low resolution spectrum observations
  12. GRB060714: optical observations
  13. Swift-BAT trigger 219136 is not a GRB
  14. Correction to Circular 5314: Circular refers to GRB 060714
  15. GRB060707 possible optical confirmation
  16. Swift trigger 219136 is probably not a GRB
  17. GRB 060714, optical observation
  18. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  19. GRB 060605: SkyNet Optical Limits
  20. GRB060712: P60 Observations
  21. GRB 060712: XRT refined analysis
  22. GRB 060712: Swift/UVOT Upper Limits
  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. GRB 060707: Swift detection of a burst
  43. GRB 060515: Upper Limit on Host Galaxy
  44. GRB 050223: Magellan redshift
  45. GRB 060614: SMARTS host galaxy observations
  46. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  47. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  48. GRB 060109: Upper Limit on Host Galaxy
  49. GRB 060105: Upper limit on Host Galaxy
  50. GRB060614: Detection of the host galaxy but no supernova emission
  51. GRB 060614: redshift confirmation
  52. GRB 060614: Redshift
  53. Swift-BAT trigger 215279 is not a GRB
  54. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  55. GRB060614: Optical observations
  56. GRB 060614: spectroscopy
  57. GRB050326: Host Galaxy Candidates
  58. GRB050124: Possible Host Galaxy
  59. GRB050223: Host Galaxy
  60. GRB060512: near IR observations
  61. GRB060526: optical observations
  62. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  63. Konus-Wind observation of GRB 060614
  64. GRB060605: optical observation
  65. The Unusually Long-Lived Afterglow of GRB 060614
  66. GRB 060614: optical observations
  67. GRB 060605, optical observations
  68. GRB 060614, SMARTS optical/IR afterglow observation
  69. GRB060614: SSO 1m observations
  70. GRB060614: Watcher observation
  71. GRB 060614: Swift-BAT refined analysis
  72. GRB 060614: Swift/UVOT Observations
  73. GRB 060604, optical observations
  74. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  75. GRB 060602A: Swift/XRT analysis
  76. GRB 060610: KAIT observations
  77. GRB 060607: RTT150 optical observations
  78. GRB 070706B: Watcher upper limit
  79. GRB 060607B: Swift-BAT Refined Analysis
  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: Swift-XRT Team refined analysis
  85. GRB 060607: IR observations
  86. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  87. VLT/UVES observations of GRB 060607
  88. GRB 060607: PROMPT Observations
  89. GRB 060605: RTT150 optical observations
  90. GRB 060607: REM NIR afterglow
  91. GRB 060607: Swift detection of a burst with bright optical counterpart
  92. GRB 060522: PROMPT Optical Limits
  93. GRB 060605 BAT refined analysis
  94. GRB 060605: Xinglong TNT optical observations
  95. GRB060602B : REM infrared observations
  96. GRB060605: Swift/UVOT detections
  97. GRB 060605: Swift-XRT Team refined analysis
  98. SALT spectroscopy of GRB 060605
  99. GRB 060605: TNG optical observations
  100. GRB 060605: RTT150 optical observations

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