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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"

42283 results found.

  1. GRB 060719: TORTOREM optical upper limits
  2. GRB 060729: Swift/UVOT Detections
  3. GRB 060729: Refined analysis of the Swift-BAT burst
  4. GRB 060729: Swift-XRT refined analysis
  5. GRB 060729 : Planned XMM-Newton observation
  6. GRB 060729: Swift/UVOT Observations
  7. GRB 060729: ROTSE-III Detection of Optical Counterpart
  8. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  9. GRB 060728: Refined analysis of the Swift-BAT burst
  10. GRB 060728, SMARTS optical/IR observations
  11. Swift/XRT preliminary analysis
  12. GRB 060728: Swift detection of a burst
  13. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  14. GRB 060714: Swift/UVOT Observations
  15. GRB060719: prompt NIR observations with REM
  16. GRB 060714: NOT observations
  17. GRB 060719: near-infrared afterglow
  18. GRB 060719: correction to the coordinates reported in GCN 5347
  19. GRB 060522: VLA observation
  20. GRB 060719: VLT/ISAAC observations
  21. GRB 060719: XRT refined analysis
  22. GRB 060719: optical limit by Pi-of-the-Sky
  23. GRB060719: FRAM early follow-up limit
  24. GRB 060719: prompt PROMPT observations
  25. GRB 060719: Continued LCO optical observations
  26. GRB 060719: VLT observations
  27. GRB 060719: LCO optical observations
  28. GRB 060719: Swift detection of a burst
  29. GRB 060717: Swift XRT refined analysis
  30. GRB 060714: OA fading and a possible host detection
  31. GRB060714: optical observations
  32. GRB 060717: NOT observations
  33. GRB 060714: Refined analysis of the Swift-BAT burst
  34. GRB 060717 optical upper limit
  35. GRB 060717: Swift XRT refined position
  36. GRB060717 - SDSS Pre-burst Observations
  37. GRB 060714: REM infrared observations
  38. GRB 060717, optical observation
  39. GRB 060717: Swift detection of a burst
  40. GRB060714: correction to GCN 5324
  41. GRB060714: optical observations
  42. GRB 060714, SMARTS optical/IR afterglow observation
  43. GRB 060714 : Liverpool Telescope Observations
  44. GRB 060714: Swift XRT refined analysis
  45. GRB 060714: OA redshift
  46. GRB 060708: VLT spectroscopy
  47. GRB060708: MARGE low resolution spectrum observations
  48. GRB060714: optical observations
  49. Correction to Circular 5314: Circular refers to GRB 060714
  50. GRB060707 possible optical confirmation
  51. Swift trigger 219136 is probably not a GRB
  52. GRB 060714, optical observation
  53. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  54. GRB 060605: SkyNet Optical Limits
  55. GRB060712: P60 Observations
  56. GRB 060712: XRT refined analysis
  57. GRB 060712: Swift/UVOT Upper Limits
  58. GRB060526: optical observations
  59. GRB 060712: XRT refined position
  60. GRB060712: MASTER optical observation
  61. GRB120706: MASTER optical observation
  62. GRB 060712: Swift detection of a burst
  63. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  64. GRB 060708: PROMPT Optical Limits
  65. GRB 060707: OA fading and redshift
  66. GRB 060708: Swift-XRT refined analysis
  67. GCN 060708: Swift-UVOT Observations
  68. GCN 060707: Swift-UVOT observations
  69. GRB 060707: Swift-XRT refined analysis
  70. GRB 060708: Swift detection of a burst with an UVOT countpart
  71. GRB060707 possible optical confirmation
  72. GRB 060707: BOOTES-IR optical afterglow candidate
  73. GRB 060707: Refined analysis of the Swift-BAT burst
  74. GRB 060707: BOOTES-IR optical observation
  75. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  76. GRB 060707: Swift detection of a burst
  77. GRB 060515: Upper Limit on Host Galaxy
  78. GRB 050223: Magellan redshift
  79. GRB 060614: SMARTS host galaxy observations
  80. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  81. GRB 060109: Upper Limit on Host Galaxy
  82. GRB 060105: Upper limit on Host Galaxy
  83. GRB060614: Detection of the host galaxy but no supernova emission
  84. GRB 060614: redshift confirmation
  85. GRB 060614: Redshift
  86. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  87. GRB060614: Optical observations
  88. GRB 060614: spectroscopy
  89. GRB050326: Host Galaxy Candidates
  90. GRB050124: Possible Host Galaxy
  91. GRB050223: Host Galaxy
  92. GRB060512: near IR observations
  93. GRB060526: optical observations
  94. Konus-Wind observation of GRB 060614
  95. GRB060605: optical observation
  96. The Unusually Long-Lived Afterglow of GRB 060614
  97. GRB 060614: optical observations
  98. GRB 060605, optical observations
  99. GRB 060614, SMARTS optical/IR afterglow observation
  100. GRB060614: Watcher observation

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