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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"

45503 results found.

  1. GRB110915A MITSuME Okayama J-band upper-limit
  2. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  3. GRB 110915A: NOT observations
  4. GRB 110915A: 1.23m CAHA I-band observations
  5. GRB 110915B: SuperAGILE localization of a long GRB
  6. GRB 110915A: Enhanced Swift-XRT position
  7. GRB 110915A: GMG optical upper limit
  8. GRB 110915A: MITSuME Akeno Optical upper limits
  9. GRB 110915A: MASTER-Net early limit
  10. GRB 110915A: Prompt enhanced Swift-XRT position
  11. GRB 110915A: Swift detection of a burst
  12. GRB 110825A: Further Swift/XRT Observations
  13. GRB 110731A: SAO RAS and Terskol observations
  14. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  15. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  16. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  17. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  18. GRB 110905A: KAIT observations
  19. GRB 110905A: Swift detection of a burst
  20. GRB 110903A: Fermi GBM observation
  21. GRB 110903A: Swift/UVOT Upper Limits
  22. GRB 110903A: Swift-XRT observations
  23. Konus-Wind observation of GRB 110903A
  24. GRB 110903A: a long GRB detected by INTEGRAL
  25. GRB 110820A: optical upper limit
  26. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  27. Trigger 502024: Swift detection of KS 1741-293
  28. GRB110825A: Fermi GBM observation
  29. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  30. Swift detection of an SGR burst from Swift J1834.9-0846
  31. GRB 110825A: Suzaku WAM observation of the prompt emission
  32. GRB 110825A: GMG optical observation
  33. GRB110825A: ROTSE early time optical limit
  34. GRB 110827A, Swift-BAT refined analysis
  35. GRB 110825A: optical afterglow candidate
  36. GRB 110827A: Swift detection of a burst
  37. GRB 110825A: field inspection and possible host galaxy
  38. GRB110825A: Swift target of opportunity observation
  39. IPN triangulation of GRB110825A (very intense, long-duration)
  40. GRB 110820A, the review of the sky area in plate archives
  41. Swift-BAT Trigger 501485 is noise
  42. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  43. Fermi GBM trigger 110823.518 is not a GRB
  44. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  45. Konus-Wind observation of GRB 110820B
  46. GRB 110820A: MASTER-NET first hour observations
  47. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  48. GRB 110820A: Swift/UVOT Upper Limits
  49. GRB 110820A: Position udpate + 2nd epoch data
  50. GRB 110820A: i-band finding chart + correction to 12295
  51. GRB 110820A: CQUEAN izY Observation
  52. GRB 110820A: Swift-XRT refined Analysis
  53. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  54. GRB 110820A: Swift-BAT refined analysis
  55. GRB 110820A: Enhanced Swift-XRT position
  56. GRB 110820A: CrAO optical upper limit
  57. GRB 110820A: MASTER-NET observations
  58. GRB 110820A: Swift detection of a burst
  59. GRB 110818A: Fermi GBM observation
  60. GRB 110818A: Swift/UVOT Upper Limits
  61. GRB 110818A: Enhanced Swift-XRT position
  62. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  63. GRB 110818A: Swift-XRT refined Analysis
  64. GRB 110815A: Swift-XRT and UVOT refined Analysis
  65. GRB 110818A, Swift-BAT refined analysis
  66. GRB 110815A : Suzaku WAM observation of the prompt emission
  67. GRB 110818A: Swift detection of a burst
  68. Konus-Wind observation of GRB 110815A
  69. IPN triangulation of GRB110815A (long, intense)
  70. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  71. GRB 110801A: optical observations at Mt. Terskol observatory
  72. GRB 110812A: SuperAGILE localization of a long GRB.
  73. Reprocessed enhanced Swift-XRT positions and GRB products: update
  74. SGR 1834.9-0846/ GRB 110807A, I-band observations
  75. Konus-Wind observation of GRB 110808B
  76. Konus-Wind observation of GRB 110808A
  77. IPN triangulation of GRB 110808B (short/hard/intense)
  78. A new photometric resource for GRB observers
  79. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  80. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  81. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  82. GRB 110808A: Swift/UVOT Detection
  83. Swift Trigger 458942 is probably not a burst
  84. GRB 110808A: Swift-BAT refined analysis
  85. GRB 110808A: Swift-XRT refined Analysis
  86. SGR J1834.9-0846: A Neutron Star in W41?
  87. Swift SGR 1834.9-0846: Swift-BAT refined analysis
  88. GRB 110808A: VLT/X-shooter spectroscopy
  89. GRB 110808A: Enhanced Swift-XRT position
  90. GRB 110808A: Swift detection of a burst with optical counterpart
  91. Fermi GBM detection of a SGR-like burst
  92. GRB 110807A: SAO RAS observations
  93. GRB 110807A: Swift detection of a burst or a posible new SGR
  94. Fermi Gamma-ray Burst Monitor trigger 110806.263 is not a GRB
  95. GRB 110726A: two epochs of SAO RAS optical observations
  96. Reprocessed enhanced Swift-XRT positions and GRB products
  97. Konus-Wind observation of GRB 110802A
  98. Fermi GBM trigger 334123030 (110804165) is not a GRB
  99. IPN triangulation of GRB110802A (short/hard burst)
  100. GRB 110801A: optical observations in CrAO

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