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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"

32720 results found.

  1. GRB 060728: Refined analysis of the Swift-BAT burst
  2. GRB 060728, SMARTS optical/IR observations
  3. Swift/XRT preliminary analysis
  4. GRB060614 ATCA Radio Limits
  5. GRB 060218 (SN 2006aj): IR afterglow detection six months after the
  6. GRB 060714: Swift/UVOT Observations
  7. GRB060719: prompt NIR observations with REM
  8. GRB 060714: NOT observations
  9. GRB 060719: near-infrared afterglow
  10. GRB 060719: correction to the coordinates reported in GCN 5347
  11. GRB 060522: VLA observation
  12. GRB 060719: Swift/UVOT Upper Limits
  13. GRB 060719: VLT/ISAAC observations
  14. GRB 060719: Refined analysis of the Swift-BAT burst
  15. GRB 060719: XRT refined analysis
  16. GRB 060719: further analysis of VLT observations
  17. GRB 060719: prompt PROMPT observations
  18. GRB060719: REM NIR Observations
  19. GRB 060719: Continued LCO optical observations
  20. GRB 060719: VLT observations
  21. GRB 060717: Swift XRT refined analysis
  22. GRB 060714: OA fading and a possible host detection
  23. GRB 060717: NOT observations
  24. GRB 060714: Refined analysis of the Swift-BAT burst
  25. GRB 060717 optical upper limit
  26. GRB060717: Swift/UVOT upper limits
  27. GRB 060717: Swift XRT refined position
  28. GRB 060717: Swift-BAT refined analysis
  29. GRB060717 - SDSS Pre-burst Observations
  30. GRB 060714: REM infrared observations
  31. GRB 060717, optical observation
  32. GRB060714: correction to GCN 5324
  33. GRB 060714, SMARTS optical/IR afterglow observation
  34. GRB 060714 : Liverpool Telescope Observations
  35. GRB 060714: Swift XRT refined analysis
  36. GRB 060714: OA redshift
  37. GRB 060708: VLT spectroscopy
  38. GRB060708: MARGE low resolution spectrum 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. GRB 060714, optical observation
  43. GRB 060605: SkyNet Optical Limits
  44. GRB060712: P60 Observations
  45. GRB 060712: Swift/UVOT Upper Limits
  46. GRB 060712: Refined analysis of the Swift-BAT burst
  47. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  48. GRB 060708: PROMPT Optical Limits
  49. GRB 060707: OA fading and redshift
  50. GRB 060708: Swift-XRT refined analysis
  51. GCN 060708: Swift-UVOT Observations
  52. GRB 060708: Refined analysis of the Swift-BAT burst
  53. GCN 060707: Swift-UVOT observations
  54. GRB 060707: Swift-XRT refined analysis
  55. GRB060707 possible optical confirmation
  56. GRB 060707: Refined analysis of the Swift-BAT burst
  57. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  58. GRB 060515: Upper Limit on Host Galaxy
  59. GRB 050223: Magellan redshift
  60. GRB 060614: SMARTS host galaxy observations
  61. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  62. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  63. GRB 060109: Upper Limit on Host Galaxy
  64. GRB 060105: Upper limit on Host Galaxy
  65. GRB060614: Detection of the host galaxy but no supernova emission
  66. GRB 060614: redshift confirmation
  67. GRB 060614: Redshift
  68. Swift-BAT trigger 215279 is not a GRB
  69. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  70. GRB060614: Optical observations
  71. GRB 060614: spectroscopy
  72. GRB050326: Host Galaxy Candidates
  73. GRB050124: Possible Host Galaxy
  74. GRB050223: Host Galaxy
  75. GRB060512: near IR observations
  76. Konus-Wind observation of GRB 060614
  77. GRB060605: optical observation
  78. The Unusually Long-Lived Afterglow of GRB 060614
  79. GRB 060614: optical observations
  80. GRB 060605, optical observations
  81. GRB 060614, SMARTS optical/IR afterglow observation
  82. GRB060614: SSO 1m observations
  83. GRB060614: Watcher observation
  84. GRB 060614: Swift-BAT refined analysis
  85. GRB 060614: Swift/UVOT Observations
  86. GRB060614: Swift-XRT refined analysis
  87. GRB 060604, optical observations
  88. GRB 060602A: Swift/XRT analysis
  89. BAT Trigger #214277 is SGR 1900+14
  90. GRB 070706B: Watcher upper limit
  91. GRB 060607B: Swift-BAT Refined Analysis
  92. GRB060602A: Swift/UVOT upper limits
  93. GCN 060607: Swift-UVOT obswervations.
  94. GRB 060607: Swift-BAT Refined Analysis
  95. GRB 060607: Swift-XRT Team refined analysis
  96. GRB 060607: IR observations
  97. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  98. VLT/UVES observations of GRB 060607
  99. GRB 060607: PROMPT Observations
  100. GRB 060607: REM NIR afterglow

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