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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"

32721 results found.

  1. GRB 090727: Swift-BAT refined analysis
  2. GRB 090727: Swift-XRT refined analysis
  3. GRB 090727: Liverpool Telescope Afterglow Confirmation and Optical Flare
  4. GRB 090715B: Late-time Lick 3m observations
  5. GRB 090727: Liverpool Telescope possible OT candidate
  6. GRB090726: Swift/UVOT observations
  7. GRB 090726, Swift-BAT refined analysis
  8. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  9. GRB 090726: D50 optical observations
  10. GRB090726: 6-meter telescope redshift
  11. GRB 090726: Swift-XRT Team refined analysis
  12. GRB 090726: optical transient candidate
  13. GRB 090726: Swift/UVOT Finding Chart Observation
  14. Konus-Wind and Konus-RF observations of GRB 090719
  15. Konus-RF and Konus-Wind observations of GRB 090718B
  16. Konus-Wind observations of bright hard GRB 090720B
  17. IPN Triangulation of bright GRB 090720B
  18. GRB 090720: Gemini-North Imaging and Optical Afterglow
  19. Swift XRT and UVOT refned analysis of GRB 090720
  20. GRB 090709A: Swift XRT Timing Analysis
  21. GRB 090715B: VLA radio detection
  22. GRB 090720 Source found in ground processing of Swift-BAT data
  23. GRB 090715B: further NOT optical observations
  24. GRB 090715A: Suzaku WAM observation of the prompt emission
  25. GRB 090709A - CARMA mm Observations
  26. GRB 090715B: Lick observations
  27. Konus-Wind observations of short/hard GRB 090715A
  28. GRB 090715B: MASTER optical limit
  29. GRB 090715A: Swift-BAT refined analysis
  30. Konus-Wind and Konus-RF observations of GRB 090715B
  31. GRB 090715B: Swift/UVOT followup observations
  32. GRB 090715B: break in the optical afterglow decay
  33. GRB 090715B: Observation of the optical afterglow
  34. GRB 090715B: Swift XRT Refined Analysis
  35. GRB090715B: WHT redshift
  36. GRB 090715B: Swift-BAT refined analysis
  37. GRB 090715B: NOT optical observations
  38. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  39. GRB 090715A: ROTSE-III Optical Limits
  40. GRB 090715: Swift detection of a short hard burst
  41. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  42. Swift satellite anomaly
  43. GRB 090712: Fermi GBM observation
  44. GRB 090712: Swift-BAT refined analysis
  45. GRB 090709A: Xinglong TNT optical upper limit
  46. VLA radio observations of GRB 090709A
  47. GRB 090621B: MTM-500 optical observations
  48. GRB 090709A: deep optical observation with the 10.4m GTC
  49. GRB090709A : WSRT Radio observation
  50. GRB 090709A: Suzaku WAM observation of the prompt emission
  51. GRB 090709A: Swift UVOT upper limits
  52. GRB 090709A: WHT LIRIS observations
  53. GRB 090709B: Fermi GBM detection
  54. GRB 090709A: confirmation of the periodicity in the SPI-ACS data
  55. GRB 090709A: evidence for a very red afterglow at low z
  56. Konus-Wind and Konus-RF observations of GRB 090709A
  57. GRB 090709A: P60 Observations
  58. GRB 090709A: Quasiperiodic variations in the BAT light curve
  59. GRB 090709A: NOT optical observations
  60. GRB 090709A: RAPTOR Limits During Gamma-Ray Emission
  61. GRB 090709A: Swift XRT Refined Analysis
  62. GRB 090709B, Swift-BAT refined analysis
  63. GRB 090709A: Swift-BAT refined analysis
  64. GRB 090709A: Wyoming Infrared Observatory NIR upper limits
  65. GRB 090709A, RIMOTS optical upper limits
  66. GRB 090709A - PAIRITEL Discovery of a Red Afterglow
  67. GRB 090709A: Subaru NIR observation
  68. GRB 090709 : planned Suzaku-ToO observation
  69. GRB 090708 : Fermi GBM detection
  70. GRB 090709: Faulkes Telescope North Upper Limits
  71. GRB 090626: Suzaku WAM observation of the prompt emission
  72. GRB 090709: PAIRITEL NIR Upper Limits
  73. GRB 090704: Fermi GBM observation
  74. GRB 090709: ROTSE-III Optical Limits
  75. GRB 090708: Early RAPTOR Optical Limits
  76. GRB 090708, Swift-BAT refined analysis
  77. GRB 090708: ROTSE-III Optical Limits
  78. Possible GRB090705: Swift-XRT observations
  79. GRB 090705: PAIRITEL NIR Observations
  80. XRF 090702 : RTT150 optical observations
  81. GRB 090618: Mondy optical observations
  82. GRB 090529: CrAO optical upper limit
  83. GRB 090529: MTM-500 optical observations
  84. GRB 090529: Mt.Terskol optical observations
  85. XRF 090702: Swift-XRT refined analysis
  86. GRB 090702: UVOT upper limits
  87. GRB 090313: optical observations
  88. XRF 090702: VLT imaging
  89. XRF 090702: Swift-XRT afterglow position
  90. GRB 090404: Deep optical imaging and possible host association (correction)
  91. GRB 090404: Deep optical imaging and possible host association
  92. GRB 090628: Swift XRT refined analysis
  93. GRB 090618: RTT150 optical observations
  94. GRB 090628: Swift/UVOT Upper Limits
  95. Konus-Wind observation of GRB 090626
  96. GRB080628: SAO RAS optical observations
  97. GRB 090628: Swift-BAT refined analysis
  98. GRB090618: 15GHz radio emission faded
  99. GRB 090628: GROND upper limits
  100. GRB 090628: 1.23m CAHA optical observations

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