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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"

36140 results found.

  1. GRB 060729: ROTSE-III Detection of Optical Counterpart
  2. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  3. GRB 060728: Swift/UVOT Upper Limits
  4. GRB 060728: Refined analysis of the Swift-BAT burst
  5. GRB 060728, SMARTS optical/IR observations
  6. GRB 060728: Swift detection of a burst
  7. GRB060614 ATCA Radio Limits
  8. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  9. GRB 060714: Swift/UVOT Observations
  10. GRB 060714: NOT observations
  11. GRB 060719: near-infrared afterglow
  12. GRB 060719: correction to the coordinates reported in GCN 5347
  13. GRB 060522: VLA observation
  14. GRB 060719: Swift/UVOT Upper Limits
  15. GRB 060719: VLT/ISAAC observations
  16. GRB 060719: Refined analysis of the Swift-BAT burst
  17. GRB 060719: XRT refined analysis
  18. GRB 060719: further analysis of VLT observations
  19. GRB 060719: optical limit by Pi-of-the-Sky
  20. GRB060719: FRAM early follow-up limit
  21. GRB 060719: prompt PROMPT observations
  22. GRB060719: REM NIR Observations
  23. GRB 060719: Continued LCO optical observations
  24. GRB 060719: VLT observations
  25. GRB 060719: LCO optical observations
  26. GRB 060719: Swift detection of a burst
  27. GRB 060717: Swift XRT refined analysis
  28. GRB 060714: OA fading and a possible host detection
  29. GRB060714: optical observations
  30. GRB 060717: NOT observations
  31. GRB 060714: Refined analysis of the Swift-BAT burst
  32. GRB 060717 optical upper limit
  33. GRB060717: Swift/UVOT upper limits
  34. GRB 060717: Swift XRT refined position
  35. GRB 060717: Swift-BAT refined analysis
  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. Swift-BAT trigger 219136 is not a GRB
  50. Correction to Circular 5314: Circular refers to GRB 060714
  51. GRB060707 possible optical confirmation
  52. Swift trigger 219136 is probably not a GRB
  53. GRB 060714, optical observation
  54. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  55. GRB 060605: SkyNet Optical Limits
  56. GRB060712: P60 Observations
  57. GRB 060712: XRT refined analysis
  58. GRB 060712: Swift/UVOT Upper Limits
  59. GRB060526: optical observations
  60. GRB 060712: XRT refined position
  61. GRB 060712: Refined analysis of the Swift-BAT burst
  62. GRB060712: MASTER optical observation
  63. GRB120706: MASTER optical observation
  64. GRB 060712: Swift detection of a burst
  65. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  66. GRB 060708: PROMPT Optical Limits
  67. GRB 060707: OA fading and redshift
  68. GRB 060708: Swift-XRT refined analysis
  69. GCN 060708: Swift-UVOT Observations
  70. GRB 060708: Refined analysis of the Swift-BAT burst
  71. GCN 060707: Swift-UVOT observations
  72. GRB 060707: Swift-XRT refined analysis
  73. GRB 060708: Swift detection of a burst with an UVOT countpart
  74. GRB060707 possible optical confirmation
  75. GRB 060707: BOOTES-IR optical afterglow candidate
  76. GRB 060707: Refined analysis of the Swift-BAT burst
  77. GRB 060707: BOOTES-IR optical observation
  78. GRB 060707: Swift detection of a burst
  79. GRB 060515: Upper Limit on Host Galaxy
  80. GRB 050223: Magellan redshift
  81. GRB 060614: SMARTS host galaxy observations
  82. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  83. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  84. GRB 060109: Upper Limit on Host Galaxy
  85. GRB 060105: Upper limit on Host Galaxy
  86. GRB060614: Detection of the host galaxy but no supernova emission
  87. GRB 060614: redshift confirmation
  88. GRB 060614: Redshift
  89. Swift-BAT trigger 215279 is not a GRB
  90. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  91. GRB060614: Optical observations
  92. GRB 060614: spectroscopy
  93. GRB050326: Host Galaxy Candidates
  94. GRB050124: Possible Host Galaxy
  95. GRB050223: Host Galaxy
  96. GRB060512: near IR observations
  97. GRB060526: optical observations
  98. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  99. Konus-Wind observation of GRB 060614
  100. GRB060605: optical observation

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