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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"

32722 results found.

  1. GRB 060729: ROTSE-III Detection of Optical Counterpart
  2. GRB 060728: Swift/UVOT Upper Limits
  3. GRB 060728: Refined analysis of the Swift-BAT burst
  4. GRB 060728, SMARTS optical/IR observations
  5. Swift/XRT preliminary analysis
  6. GRB060614 ATCA Radio Limits
  7. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  8. GRB 060714: Swift/UVOT Observations
  9. GRB060719: prompt NIR observations with REM
  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: prompt PROMPT observations
  20. GRB060719: REM NIR Observations
  21. GRB 060719: Continued LCO optical observations
  22. GRB 060719: VLT observations
  23. GRB 060717: Swift XRT refined analysis
  24. GRB 060714: OA fading and a possible host detection
  25. GRB 060717: NOT observations
  26. GRB 060714: Refined analysis of the Swift-BAT burst
  27. GRB 060717 optical upper limit
  28. GRB060717: Swift/UVOT upper limits
  29. GRB 060717: Swift XRT refined position
  30. GRB 060717: Swift-BAT refined analysis
  31. GRB060717 - SDSS Pre-burst Observations
  32. GRB 060714: REM infrared observations
  33. GRB 060717, optical observation
  34. GRB060714: correction to GCN 5324
  35. GRB 060714, SMARTS optical/IR afterglow observation
  36. GRB 060714 : Liverpool Telescope Observations
  37. GRB 060714: Swift XRT refined analysis
  38. GRB 060714: OA redshift
  39. GRB 060708: VLT spectroscopy
  40. GRB060708: MARGE low resolution spectrum observations
  41. Swift-BAT trigger 219136 is not a GRB
  42. Correction to Circular 5314: Circular refers to GRB 060714
  43. GRB060707 possible optical confirmation
  44. GRB 060714, optical observation
  45. GRB 060605: SkyNet Optical Limits
  46. GRB060712: P60 Observations
  47. GRB 060712: Swift/UVOT Upper Limits
  48. GRB 060712: Refined analysis of the Swift-BAT burst
  49. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  50. GRB 060708: PROMPT Optical Limits
  51. GRB 060707: OA fading and redshift
  52. GRB 060708: Swift-XRT refined analysis
  53. GCN 060708: Swift-UVOT Observations
  54. GRB 060708: Refined analysis of the Swift-BAT burst
  55. GCN 060707: Swift-UVOT observations
  56. GRB 060707: Swift-XRT refined analysis
  57. GRB060707 possible optical confirmation
  58. GRB 060707: Refined analysis of the Swift-BAT burst
  59. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  60. GRB 060515: Upper Limit on Host Galaxy
  61. GRB 050223: Magellan redshift
  62. GRB 060614: SMARTS host galaxy observations
  63. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  64. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  65. GRB 060109: Upper Limit on Host Galaxy
  66. GRB 060105: Upper limit on Host Galaxy
  67. GRB060614: Detection of the host galaxy but no supernova emission
  68. GRB 060614: redshift confirmation
  69. GRB 060614: Redshift
  70. Swift-BAT trigger 215279 is not a GRB
  71. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  72. GRB060614: Optical observations
  73. GRB 060614: spectroscopy
  74. GRB050326: Host Galaxy Candidates
  75. GRB050124: Possible Host Galaxy
  76. GRB050223: Host Galaxy
  77. GRB060512: near IR observations
  78. Konus-Wind observation of GRB 060614
  79. GRB060605: optical observation
  80. The Unusually Long-Lived Afterglow of GRB 060614
  81. GRB 060614: optical observations
  82. GRB 060605, optical observations
  83. GRB 060614, SMARTS optical/IR afterglow observation
  84. GRB060614: SSO 1m observations
  85. GRB060614: Watcher observation
  86. GRB 060614: Swift-BAT refined analysis
  87. GRB 060614: Swift/UVOT Observations
  88. GRB060614: Swift-XRT refined analysis
  89. GRB 060604, optical observations
  90. GRB 060602A: Swift/XRT analysis
  91. BAT Trigger #214277 is SGR 1900+14
  92. GRB 070706B: Watcher upper limit
  93. GRB 060607B: Swift-BAT Refined Analysis
  94. GRB060602A: Swift/UVOT upper limits
  95. GCN 060607: Swift-UVOT obswervations.
  96. GRB 060607: Swift-BAT Refined Analysis
  97. GRB 060607: Swift-XRT Team refined analysis
  98. GRB 060607: IR observations
  99. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  100. VLT/UVES observations of GRB 060607

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