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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"

32756 results found.

  1. GRB 090424: SDSS Galaxy at the Swift position
  2. GRB 090424: TNT optical observations
  3. GRB 090424: ROTSE-III Confimation of Optical Counterpart
  4. GRB 090423: Refined TNG analysis
  5. GRB 090423 limiting magnitudes
  6. GRB 090423: Near infrared observation at Okayama Observatory
  7. GRB 090423: Deep z-band upper limit and confirmation of photo-z
  8. GRB 090423: TNG Amici spectrum
  9. GRB 090423: GROND detection and preliminary photo-z
  10. GRB 090423: NOT z-band limit
  11. GRB 090423: Correction to NIR photometry
  12. GRB 090423: Swift-XRT refined analysis
  13. GRB090418A Rc-band photometry
  14. GRB090423 - Swift/UVOT upper limits.
  15. GRB 090423: NIR photometry and evidence for spectral break
  16. GRB 090422: Swift-XRT refined analysis
  17. GRB090423, RIMOTS optical upper limits
  18. GRB 090423: UKIRT data further analysis
  19. GRB 090423: Swift-BAT refined analysis
  20. GRB 090422: Swift/UVOT Upper Limits
  21. GRB 090423: P60 Observations
  22. GRB 090423: Faulkes Telescope South observations
  23. GRB 090418A: R and I band observation
  24. GRB 090422: Liverpool Telescope possible candidate
  25. GRB 090418A: Konus-Wind and Swift/BAT joint spectral analysis
  26. GRB 090422: Swift-BAT refined analysis
  27. GRB 090410: Erratum in GCN 9189
  28. GRB 090408A: Erratum in GCN 9188
  29. GRB 090418B: RTT150 optical observations
  30. GRB 090418A: RTT150 optical observations
  31. GRB 080410: GAO 150cm telescope Optical Observation
  32. GRB 080408A: GAO 150cm telescope Optical Observation
  33. GRB 090422: Liverpool Telescope observations
  34. GRB 090417B: Optical observation
  35. GRB 090418A: optical observations
  36. GRB 090418B: GROND observations
  37. GRB 090419: Swift/UVOT Observations
  38. GRB 090418B: Faulkes Telescope North observations
  39. GRB 090418A: Swift/UVOT Observations
  40. GRB 090417B: Swift/UVOT Upper Limits
  41. GRB 090417B Correction to the BAT refined analysis position
  42. GRB 090419: Swift-XRT refined analysis
  43. Konus-Wind observation of GRB 090418B
  44. GRB 090418: Erratum in GCN 9168
  45. GRB 090419: GROND detection of afterglow candidate
  46. GRB 090418: Optical observations with MITSuME Okayama and Ishigaki 1m telescope
  47. GRB 090419: Swift-BAT refined analysis
  48. VLA radio detection of GRB 090418
  49. VLA radio upper limit on GRB 090417B
  50. GRB 090418: Swift XRT refined analysis
  51. GRB 090418A: ROTSE-III Refined Analysis
  52. VLA observations of short burst GRB 090417A
  53. GRB 090417B: Gemini imaging
  54. GRB 090418: Swift-BAT refined analysis
  55. GRB 090417B: Galaxy redshift
  56. GRB 090417B: Swift-XRT refined analysis
  57. GRB 090417B: Swift-BAT further refined analysis
  58. GRB 090418: PAIRITEL NIR detection
  59. GRB 090418 Lick Redshift
  60. GRB 090418: ROTSE-III Confirmation of Optical Counterpart
  61. GRB 090411B: Suzaku WAM observation of the prompt emission
  62. GRB 090411A: Suzaku WAM observation of the prompt emission
  63. GRB 090417B: Subaru NIR Observations
  64. GRB 090417B: Liverpool Telescope observations
  65. GRB 090417B: MITSuME Okayama optical upper limits
  66. GRB090417B: Xinglong TNT optical upper limit
  67. GRB 090417B: optical observations
  68. GRB090417B: optical observations
  69. GRB 090417B: Swift-BAT refined analysis
  70. GRB 090417A: Swift-BAT refined analysis
  71. GRB 090417A: Early-type nature of the putative host
  72. GRB 090417A: nearby galaxy redshift
  73. GRB 090417: 2MASS galaxy within BAT Localization
  74. GRB 090410: Suzaku WAM observation of the prompt emission
  75. GRB 090410: GROND upper limits
  76. GRB 090410: MITSuME optical upper limits
  77. GRB 090408b: IPN Triangulation
  78. GRB 090328b: IPN Triangulation
  79. GRB 090410: Swift-BAT refined analysis
  80. GRB090408, RIMOTS optical upper limits
  81. GRB 090408: Xinglong TNT optical Upper Limit
  82. GRB 090408B: MASTER II-Kourovka optical observations
  83. GRB 090407: GROND upper limits
  84. GRB 090407: VLT observations
  85. GRB 090407: Swift-XRT refined analysis
  86. GRB 090407: Swift UVOT Upper Limits
  87. GRB 090407: Swift-BAT refined analysis
  88. GRB 090407: ROTSE-III Optical Limits
  89. GRB 090404: GROND upper limits
  90. GRB 090404: further NOT observations
  91. Swift/UVOT observations of GRB090404
  92. GRB 090404: NOT observations
  93. GRB 090404: Swift-XRT Team refined analysis
  94. GRB 090404: Xinglong TNT optical Upper Limit
  95. GRB 090404: Swift-BAT refined analysis
  96. GRB 090401A: Suzaku WAM observation of the prompt emission
  97. GRB 090401B: Suzaku WAM observation of the prompt emission
  98. Konus-Wind observation of GRB 090401B
  99. GRB 090401B: Xinglong TNT optical Upper Limit
  100. GRB 090401B: VLA radio upper limit

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