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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"

45674 results found.

  1. GRB 060714: NOT observations
  2. GRB 060719: near-infrared afterglow
  3. GRB 060719: correction to the coordinates reported in GCN 5347
  4. GRB 060522: VLA observation
  5. GRB 060719: Swift/UVOT Upper Limits
  6. GRB 060719: VLT/ISAAC observations
  7. GRB 060719: Refined analysis of the Swift-BAT burst
  8. GRB 060719: XRT refined analysis
  9. GRB 060719: further analysis of VLT observations
  10. GRB 060719: optical limit by Pi-of-the-Sky
  11. GRB060719: FRAM early follow-up limit
  12. GRB 060719: prompt PROMPT observations
  13. GRB060719: REM NIR Observations
  14. GRB 060719: VLT observations
  15. GRB 060719: LCO optical observations
  16. GRB 060719: Swift detection of a burst
  17. GRB 060717: Swift XRT refined analysis
  18. GRB 060714: OA fading and a possible host detection
  19. GRB060714: optical observations
  20. GRB 060717: NOT observations
  21. GRB 060714: Refined analysis of the Swift-BAT burst
  22. GRB 060717 optical upper limit
  23. GRB060717: Swift/UVOT upper limits
  24. GRB 060717: Swift XRT refined position
  25. GRB 060717: Swift-BAT refined analysis
  26. GRB060717 - SDSS Pre-burst Observations
  27. GRB 060714: REM infrared observations
  28. GRB 060717, optical observation
  29. GRB 060717: Swift detection of a burst
  30. GRB060714: correction to GCN 5324
  31. GRB060714: optical observations
  32. GRB 060714, SMARTS optical/IR afterglow observation
  33. GRB 060714 : Liverpool Telescope Observations
  34. GRB 060714: Swift XRT refined analysis
  35. GRB 060714: OA redshift
  36. GRB 060708: VLT spectroscopy
  37. GRB060708: MARGE low resolution spectrum observations
  38. GRB060714: optical observations
  39. Swift-BAT trigger 219136 is not a GRB
  40. Correction to Circular 5314: Circular refers to GRB 060714
  41. GRB060707 possible optical confirmation
  42. Swift trigger 219136 is probably not a GRB
  43. GRB 060714, optical observation
  44. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  45. GRB 060605: SkyNet Optical Limits
  46. GRB060712: P60 Observations
  47. GRB 060712: XRT refined analysis
  48. GRB 060712: Swift/UVOT Upper Limits
  49. GRB060526: optical observations
  50. GRB 060712: XRT refined position
  51. GRB 060712: Refined analysis of the Swift-BAT burst
  52. GRB 060712: Swift detection of a burst
  53. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  54. GRB 060708: PROMPT Optical Limits
  55. GRB 060707: OA fading and redshift
  56. GRB 060708: Swift-XRT refined analysis
  57. GCN 060708: Swift-UVOT Observations
  58. GRB 060708: Refined analysis of the Swift-BAT burst
  59. GCN 060707: Swift-UVOT observations
  60. GRB 060707: Swift-XRT refined analysis
  61. GRB 060708: Swift detection of a burst with an UVOT countpart
  62. GRB060707 possible optical confirmation
  63. GRB 060707: BOOTES-IR optical afterglow candidate
  64. GRB 060707: Refined analysis of the Swift-BAT burst
  65. GRB 060707: BOOTES-IR optical observation
  66. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  67. GRB 060707: Swift detection of a burst
  68. GRB 060515: Upper Limit on Host Galaxy
  69. GRB 050223: Magellan redshift
  70. GRB 060614: SMARTS host galaxy observations
  71. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  72. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  73. GRB 060109: Upper Limit on Host Galaxy
  74. GRB 060105: Upper limit on Host Galaxy
  75. GRB060614: Detection of the host galaxy but no supernova emission
  76. GRB 060614: redshift confirmation
  77. GRB 060614: Redshift
  78. Swift-BAT trigger 215279 is not a GRB
  79. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  80. GRB060614: Optical observations
  81. GRB 060614: spectroscopy
  82. GRB050326: Host Galaxy Candidates
  83. GRB050124: Possible Host Galaxy
  84. GRB050223: Host Galaxy
  85. GRB060512: near IR observations
  86. GRB060526: optical observations
  87. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  88. Konus-Wind observation of GRB 060614
  89. GRB060605: optical observation
  90. The Unusually Long-Lived Afterglow of GRB 060614
  91. GRB 060614: optical observations
  92. GRB 060605, optical observations
  93. GRB 060614, SMARTS optical/IR afterglow observation
  94. GRB060614: SSO 1m observations
  95. GRB060614: Watcher observation
  96. GRB 060614: Swift-BAT refined analysis
  97. GRB 060614: Swift/UVOT Observations
  98. GRB060614: Swift-XRT refined analysis
  99. GRB 060604, optical observations
  100. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart

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