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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"

24417 results found.

  1. GRB 090727: Liverpool Telescope Afterglow Confirmation and Optical Flare
  2. GRB 090715B: Late-time Lick 3m observations
  3. GRB 090727: Swift detection of a burst
  4. GRB 090726, Swift-BAT refined analysis
  5. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  6. GRB 090726: D50 optical observations
  7. GRB 090711: Fermi GBM detection
  8. GRB 090726: Swift-XRT position of probable counterpart
  9. GRB 090726: Swift detection of a burst
  10. Konus-Wind and Konus-RF observations of GRB 090719
  11. Konus-RF and Konus-Wind observations of GRB 090718B
  12. Konus-Wind observations of bright hard GRB 090720B
  13. IPN Triangulation of bright GRB 090720B
  14. GRB 090720: Gemini-North Imaging and Optical Afterglow
  15. GRB 090720B: Fermi GBM detection
  16. GRB 090717B: Fermi GBM detection
  17. GRB 090717: Fermi GBM detection
  18. GRB 090719: Fermi GBM detection
  19. GRB 090718B: Fermi GBM detection
  20. GRB 090718: Fermi GBM detection
  21. GRB 090720: Fermi GBM detection
  22. GRB 090715B: further NOT optical observations
  23. GRB 090715A: Suzaku WAM observation of the prompt emission
  24. Konus-Wind observations of short/hard GRB 090715A
  25. GRB 090715B: MASTER optical limit
  26. GRB 090715A: Swift-BAT refined analysis
  27. Konus-Wind and Konus-RF observations of GRB 090715B
  28. GRB 090715B: break in the optical afterglow decay
  29. GRB 090715B: Swift-BAT refined analysis
  30. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  31. GRB 090715A: ROTSE-III Optical Limits
  32. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  33. Swift satellite anomaly
  34. GRB 090712: Fermi GBM observation
  35. GRB 090713: Fermi GBM detection
  36. GRB 090712: Swift-BAT refined analysis
  37. GRB 090709A: Xinglong TNT optical upper limit
  38. GRB 090621B: MTM-500 optical observations
  39. GRB 090709A: Suzaku WAM observation of the prompt emission
  40. GRB 090709A: WHT LIRIS observations
  41. GRB 090709B: Fermi GBM detection
  42. GRB 090709A: evidence for a very red afterglow at low z
  43. Konus-Wind and Konus-RF observations of GRB 090709A
  44. GRB 090709A: P60 Observations
  45. GRB 090709A: Quasiperiodic variations in the BAT light curve
  46. GRB 090709A: NOT optical observations
  47. GRB 090709B, Swift-BAT refined analysis
  48. GRB 090709A: Swift-BAT refined analysis
  49. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  50. GRB 090708 : Fermi GBM detection
  51. GRB 090626: Suzaku WAM observation of the prompt emission
  52. GRB 090709: PAIRITEL NIR Upper Limits
  53. GRB 090704: Fermi GBM observation
  54. GRB 090709: ROTSE-III Optical Limits
  55. GRB 090708: Early RAPTOR Optical Limits
  56. GRB 090708, Swift-BAT refined analysis
  57. GRB 090708: ROTSE-III Optical Limits
  58. GRB 090704: a long GRB found in INTEGRAL off-line analysis
  59. GRB 090706: Fermi GBM detection
  60. Swift-BAT trigger 356516 is not a GRB
  61. GRB 090705: PAIRITEL NIR Observations
  62. GRB 090705: Swift detection of a possible burst
  63. GRB 090703: Fermi GBM detection
  64. GRB 090313: optical observations
  65. XRF 090702: VLT imaging
  66. XRF 090702: a long soft GRB localized with INTEGRAL
  67. GRB 090701: Fermi GBM detection
  68. GRB 090628: Swift XRT refined analysis
  69. GRB 090630: Fermi GBM detection
  70. Konus-Wind observation of GRB 090626
  71. GRB080628: SAO RAS optical observations
  72. GRB 090628: Swift-BAT refined analysis
  73. GRB 090628: GROND upper limits
  74. GRB 090628: 1.23m CAHA optical observations
  75. GRB 090626: IPN localization
  76. Fermi LAT observations of GRB 090626
  77. GRB 090625B: Fermi GBM observation
  78. GRB 090423: Spitzer observations of the z~8.3 burst
  79. GRB 090626: Fermi GBM detection
  80. GRB 090625B: GROND upper limits
  81. GRB 090623: Suzaku WAM observation of the prompt emission
  82. GRB 090618: SARA Second Epoch Observations
  83. GRB 090625B: Faulkes Telescope South observations
  84. GRB 090625B: a long GRB localized by INTEGRAL
  85. GRB 090625: Fermi GBM detection
  86. GRB 090618: Correction to GCN 9568
  87. GRB 090617: Suzaku WAM observation of the prompt emission
  88. GRB 090618: Suzaku WAM observation of the prompt emission
  89. GRB 090623: Fermi GBM detection
  90. PAIRITEL observations of GRB 090618
  91. GRB 090621B: Fermi GBM detection
  92. GRB 090621B: I-band observations from 1.23m CAHA
  93. GRB 090621D: Fermi GBM detection
  94. GRB 090621C: Fermi GBM detection
  95. GRB 090621B: P60 Observations
  96. GRB 090621: Fermi GBM observation
  97. GRB 090620: Fermi GBM detecion
  98. Konus-Wind and Konus-RF observations of GRB 090618
  99. GRB 090621B: Swift-BAT refined analysis
  100. GRB 090621B: Optical Observations

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