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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"

42260 results found.

  1. GRB 060719: prompt PROMPT observations
  2. GRB 060719: Continued LCO optical observations
  3. GRB 060719: VLT observations
  4. GRB 060719: LCO optical observations
  5. GRB 060719: Swift detection of a burst
  6. GRB 060717: Swift XRT refined analysis
  7. GRB 060714: OA fading and a possible host detection
  8. GRB060714: optical observations
  9. GRB 060717: NOT observations
  10. GRB 060714: Refined analysis of the Swift-BAT burst
  11. GRB 060717 optical upper limit
  12. GRB 060717: Swift XRT refined position
  13. GRB060717 - SDSS Pre-burst Observations
  14. GRB 060714: REM infrared observations
  15. GRB 060717, optical observation
  16. GRB 060717: Swift detection of a burst
  17. GRB060714: correction to GCN 5324
  18. GRB060714: optical observations
  19. GRB 060714, SMARTS optical/IR afterglow observation
  20. GRB 060714 : Liverpool Telescope Observations
  21. GRB 060714: Swift XRT refined analysis
  22. GRB 060714: OA redshift
  23. GRB 060708: VLT spectroscopy
  24. GRB060708: MARGE low resolution spectrum observations
  25. GRB060714: optical observations
  26. Correction to Circular 5314: Circular refers to GRB 060714
  27. GRB060707 possible optical confirmation
  28. Swift trigger 219136 is probably not a GRB
  29. GRB 060714, optical observation
  30. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  31. GRB 060605: SkyNet Optical Limits
  32. GRB060712: P60 Observations
  33. GRB 060712: XRT refined analysis
  34. GRB 060712: Swift/UVOT Upper Limits
  35. GRB060526: optical observations
  36. GRB 060712: XRT refined position
  37. GRB060712: MASTER optical observation
  38. GRB120706: MASTER optical observation
  39. GRB 060712: Swift detection of a burst
  40. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  41. GRB 060708: PROMPT Optical Limits
  42. GRB 060707: OA fading and redshift
  43. GRB 060708: Swift-XRT refined analysis
  44. GCN 060708: Swift-UVOT Observations
  45. GCN 060707: Swift-UVOT observations
  46. GRB 060707: Swift-XRT refined analysis
  47. GRB 060708: Swift detection of a burst with an UVOT countpart
  48. GRB060707 possible optical confirmation
  49. GRB 060707: BOOTES-IR optical afterglow candidate
  50. GRB 060707: Refined analysis of the Swift-BAT burst
  51. GRB 060707: BOOTES-IR optical observation
  52. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  53. GRB 060707: Swift detection of a burst
  54. GRB 060515: Upper Limit on Host Galaxy
  55. GRB 050223: Magellan redshift
  56. GRB 060614: SMARTS host galaxy observations
  57. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  58. GRB 060109: Upper Limit on Host Galaxy
  59. GRB 060105: Upper limit on Host Galaxy
  60. GRB060614: Detection of the host galaxy but no supernova emission
  61. GRB 060614: redshift confirmation
  62. GRB 060614: Redshift
  63. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  64. GRB060614: Optical observations
  65. GRB 060614: spectroscopy
  66. GRB050326: Host Galaxy Candidates
  67. GRB050124: Possible Host Galaxy
  68. GRB050223: Host Galaxy
  69. GRB060512: near IR observations
  70. GRB060526: optical observations
  71. Konus-Wind observation of GRB 060614
  72. GRB060605: optical observation
  73. The Unusually Long-Lived Afterglow of GRB 060614
  74. GRB 060614: optical observations
  75. GRB 060605, optical observations
  76. GRB 060614, SMARTS optical/IR afterglow observation
  77. GRB060614: Watcher observation
  78. GRB 060614: Swift-BAT refined analysis
  79. GRB 060614: Swift/UVOT Observations
  80. GRB060614: Swift-XRT refined analysis
  81. GRB 060604, optical observations
  82. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  83. GRB 060602A: Swift/XRT analysis
  84. BAT Trigger #214277 is SGR 1900+14
  85. GRB 060610: KAIT observations
  86. GRB 060607: RTT150 optical observations
  87. GRB 070706B: Watcher upper limit
  88. GRB 060607B: Swift-BAT Refined Analysis
  89. GRB060602A: Swift/UVOT upper limits
  90. GRB 060607B: Swift detection of a burst
  91. GCN 060607: Swift-UVOT obswervations.
  92. GRB 060607: Swift-BAT Refined Analysis
  93. GRB 060607: optical limit by "Pi of the Sky"
  94. GRB 060607: Swift-XRT Team refined analysis
  95. GRB 060607: IR observations
  96. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  97. VLT/UVES observations of GRB 060607
  98. GRB 060607: PROMPT Observations
  99. GRB 060605: RTT150 optical observations
  100. GRB 060607: REM NIR afterglow

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