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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"

45729 results found.

  1. Konus-Wind observation of GRB 110918A
  2. GRB110918A: BOOTES-1 optical limit
  3. MAXI/GSC detection of a short soft X-ray transient
  4. Swift detection of short bursts from PSR J1647-4552
  5. GRB 110915A: Konus-Wind and Swift/BAT joint spectral analysis
  6. IPN triangulation of GRB 110918A (long duration, extremely intense)
  7. GRB 110915B: GROND Observations of the Optical/NIR Afterglow Candidate
  8. GRB 110915A: Swift/UVOT Upper Limits
  9. GRB 110915B: Swift/UVOT Upper Limits
  10. GRB 110915A: GROND Upper limits
  11. GRB 110915A, Swift-BAT refined analysis
  12. GRB 110915A: Swift-XRT refined Analysis
  13. GRB 110915B: Afterglow candidate from OSN
  14. GRB 110915A: Deep Near-IR Limits from Magellan
  15. GRB 110915B: XRT afterglow candidate
  16. GRB 110903A: Suzaku WAM observation of the prompt emission
  17. GRB 110915A: Deep Gemini-South i/z-band imaging
  18. GRB110915A MITSuME Okayama J-band upper-limit
  19. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  20. GRB 110915A: NOT observations
  21. GRB 110915A: 1.23m CAHA I-band observations
  22. GRB 110915B: SuperAGILE localization of a long GRB
  23. GRB 110915A: Enhanced Swift-XRT position
  24. GRB 110915A: GMG optical upper limit
  25. GRB 110915A: MITSuME Akeno Optical upper limits
  26. GRB 110915A: MASTER-Net early limit
  27. GRB 110915A: Prompt enhanced Swift-XRT position
  28. GRB 110915A: Swift detection of a burst
  29. GRB 110825A: Further Swift/XRT Observations
  30. GRB 110731A: SAO RAS and Terskol observations
  31. GRB 110906A(?): Burst detection (unconfirmed) from Swift-BAT slew data
  32. MAXI J1836-194 (originally GRB 110905A): Swift-BAT refined analysis
  33. GRB 110905A / X-ray transient MAXI J1836-194: TNT optical observation
  34. GRB 110905A: Potential BAT trigger on MAXI J1836-194
  35. GRB 110905A: KAIT observations
  36. GRB 110905A: Swift detection of a burst
  37. GRB 110903A: Fermi GBM observation
  38. GRB 110903A: Swift/UVOT Upper Limits
  39. GRB 110903A: Swift-XRT observations
  40. Konus-Wind observation of GRB 110903A
  41. GRB 110903A: a long GRB detected by INTEGRAL
  42. GRB 110820A: optical upper limit
  43. SGR Swift J1834.9-0846: Correction to the Swift-BAT refined spectral analysis
  44. Trigger 502024: Swift detection of KS 1741-293
  45. GRB110825A: Fermi GBM observation
  46. SGR Swift J1834.9-0846: Swift-BAT refined analysis of trigger 501752
  47. Swift detection of an SGR burst from Swift J1834.9-0846
  48. GRB 110825A: Suzaku WAM observation of the prompt emission
  49. GRB 110825A: GMG optical observation
  50. GRB110825A: ROTSE early time optical limit
  51. GRB 110827A, Swift-BAT refined analysis
  52. GRB 110825A: optical afterglow candidate
  53. GRB 110827A: Swift detection of a burst
  54. GRB 110825A: field inspection and possible host galaxy
  55. GRB110825A: Swift target of opportunity observation
  56. IPN triangulation of GRB110825A (very intense, long-duration)
  57. GRB 110820A, the review of the sky area in plate archives
  58. Swift-BAT Trigger 501485 is noise
  59. Swift-BAT refined analysis of SFXT IGR J08408-4503 (trigger 501368)
  60. Fermi GBM trigger 110823.518 is not a GRB
  61. Swift J1834.9-0846: Precise X-ray Position and the Confirmation of its Spin Period
  62. Konus-Wind observation of GRB 110820B
  63. GRB 110820A: MASTER-NET first hour observations
  64. IPN triangulation of GRB 110820B (very long duration, extremely intense)
  65. GRB 110820A: Swift/UVOT Upper Limits
  66. GRB 110820A: Position udpate + 2nd epoch data
  67. GRB 110820A: i-band finding chart + correction to 12295
  68. GRB 110820A: CQUEAN izY Observation
  69. GRB 110820A: Swift-XRT refined Analysis
  70. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  71. GRB 110820A: Swift-BAT refined analysis
  72. GRB 110820A: Enhanced Swift-XRT position
  73. GRB 110820A: CrAO optical upper limit
  74. GRB 110820A: MASTER-NET observations
  75. GRB 110820A: Swift detection of a burst
  76. GRB 110818A: Fermi GBM observation
  77. GRB 110818A: Swift/UVOT Upper Limits
  78. GRB 110818A: Enhanced Swift-XRT position
  79. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  80. GRB 110818A: Swift-XRT refined Analysis
  81. GRB 110815A: Swift-XRT and UVOT refined Analysis
  82. GRB 110818A, Swift-BAT refined analysis
  83. GRB 110815A : Suzaku WAM observation of the prompt emission
  84. GRB 110818A: Swift detection of a burst
  85. Konus-Wind observation of GRB 110815A
  86. IPN triangulation of GRB110815A (long, intense)
  87. GRB 110801A: Konus-Wind and Swift/BAT joint spectral analysis
  88. GRB 110801A: optical observations at Mt. Terskol observatory
  89. GRB 110812A: SuperAGILE localization of a long GRB.
  90. Reprocessed enhanced Swift-XRT positions and GRB products: update
  91. SGR 1834.9-0846/ GRB 110807A, I-band observations
  92. Konus-Wind observation of GRB 110808B
  93. Konus-Wind observation of GRB 110808A
  94. IPN triangulation of GRB 110808B (short/hard/intense)
  95. A new photometric resource for GRB observers
  96. RXTE Discovery of the Spin Period of Swift J1834.9-0846
  97. SGR 1834.9-0846/ GRB 110807A: archival IR observations
  98. Fermi Gamma-ray Burst Monitor trigger 110809.346 is not a GRB
  99. GRB 110808A: Swift/UVOT Detection
  100. Swift Trigger 458942 is probably not a burst

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