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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"

32560 results found.

  1. UVOT white band observations of GRB080710
  2. GRB 080710: REM afterglow confirmation & brightening
  3. GRB 080710: KAIT OA candidate
  4. GRB 080707: possible break in the X-rays
  5. New Swift-XRT GRB products available online.
  6. GRB 080707: GROND Confirmation of the Optical Afterglow
  7. UVOT observations of GRB080707
  8. GRB 080707, Swift-BAT refined analysis
  9. GRB 080707: Swift XRT refined analysis
  10. GRB 080707: VLT redshift
  11. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  12. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  13. GRB 080703: GROND Upper Limits
  14. GRB 080702B: GROND Upper Limits
  15. GRB 080703: Swift-XRT refined analysis
  16. GRB 080703: UVOT Follow-Up Observation
  17. GRB 080703: VLT observations of the afterglow
  18. GRB 080703, Swift-BAT refined analysis
  19. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  20. No radio detection from the short GRB 080702A
  21. GRB 080702b: LCO optical observations
  22. Swift/UVOT observation of GRB080702A
  23. GRB 080702B: Swift XRT and UVOT observations
  24. GRB 080625: Suzaku WAM observation of the prompt emission
  25. GRB 080702A: MITSuME Akeno optical upper limits
  26. GRB 080701A: Early RAPTOR optical limits
  27. Swift Trigger 315630: Swift/UVOT Upper Limits
  28. GRB 080702A, Swift-BAT refined analysis
  29. GRB 080702A: Swift-XRT Team refined analysis
  30. Swift Trigger 315630: TLS R-band observation
  31. Swift Trigger 315630: Probably not a GRB
  32. GRB 080701: Swift-XRT refined analysis
  33. GRB 080701A, VATT optical upper limit
  34. TLS I-Band Observation of GRB 080701A
  35. GRB 080701A: Swift/UVOT Upper Limits
  36. GRB 080701A: Early Super-LOTIS Observations
  37. GRB 080701A, Swift-BAT refined analysis
  38. GRB 080623: Suzaku WAM observation of the prompt emission
  39. GRB 080625: Swift/UVOT Follow-Up Observations
  40. GRB 080625: Further observations from OSN
  41. GRB 080625:Swift-XRT detection of the afterglow
  42. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  43. GRB 080625: Observations at OSN
  44. GRB 080623: GROND upper limits
  45. GRB080623: Swift UVOT followup observations
  46. GRB 080623: Swift-XRT refined analysis
  47. GRB 080623, Swift-BAT refined analysis
  48. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  49. Swift trigger 314975 is not a GRB
  50. GRB080607: optical observation
  51. GRB 080603b: optical observation
  52. GRB 070809: Putative host galaxy and redshift
  53. VLA upper limit on INTEGRAL burst GRB 080613A
  54. GRB 0800603A: optical observation
  55. GRB080613B: MITSuME upper limits
  56. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  57. Konus-Wind observation of GRB 080613B
  58. GRB 080603A: optical observations on June 04
  59. GRB 080613A: Swift-XRT detection of the afterglow
  60. GRB080613A: Swift/UVOT Upper Limits
  61. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  62. GRB 080613B: GROND Upper Limits
  63. GRB 080613B - NOT optical and IR nondetections
  64. GRB080613B: Swift/UVOT Upper Limits
  65. GRB 080613B, Swift-BAT refined analysis
  66. GRB 080613B: Swift-XRT refined analysis
  67. GRB 080514B: Spectroscopic constraints and probable host galaxy
  68. GRB 080613: Faulkes Telescope North optical candidate
  69. GRB 080603A: Late-time Keck imaging and spectroscopy
  70. GRB 080603b: optical observation
  71. Swift observations of BAT Slew Survey event (Trigger=010)
  72. GRB 080603A: final Swift-XRT observations.
  73. GRB 080607: AGILE-MCAL observation of the prompt emission
  74. GRB 080603B - TLS 2nd Epoch: Another Break
  75. GRB 080605: TLS 3rd Epoch - Source Confusion
  76. GRB080605: optical observation with the MITSuME-OAO telescope
  77. Konus-Wind observation of GRB 080607
  78. GRB080607: RTT150 optical observations
  79. GRB 080603A: optical observations
  80. GRB 080607: Swift-XRT refined analysis
  81. Swift/UVOT Observations of GRB080607
  82. GRB 080605: optical observations
  83. GRB 080607 KAIT observations
  84. VLA detection of INTEGRAL burst GRB 080603A
  85. Konus-Wind observation of GRB 080605
  86. GRB 080607, Swift-BAT refined analysis
  87. GRB 080605: GROND 2nd epoch observations
  88. GRB 080607 - PAIRITEL NIR detection
  89. GRB 080607: Keck/LRIS spectroscopy and redshift
  90. GRB 080607: Super-LOTIS early observations
  91. GRB 080607: ROTSE-III Detection of Optical Counterpart
  92. GRB 080605: TLS RRM Analysis, Plateau/Rebrightening, Red OT
  93. GRB 080605: Swift-UVOT refined analysis
  94. Possible VLA radio detection on INTEGRAL burst GRB 080603A
  95. GRB 080604: VLA radio upper limit
  96. GRB 080605, Swift-BAT refined analysis
  97. GRB 080603B: VLA radio upper limit
  98. GRB 080605, Swift-BAT refined analysis
  99. GRB 080605: Swift-XRT refined analysis
  100. GRB080605: observation by BOOTES

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