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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"

11835 results found.

  1. Swift XRT and UVOT refned analysis of GRB 090720
  2. GRB 090720 Source found in ground processing of Swift-BAT data
  3. GRB 090720: Fermi GBM detection
  4. Konus-Wind observations of short/hard GRB 090715A
  5. GRB 090715A: Swift-BAT refined analysis
  6. Konus-Wind and Konus-RF observations of GRB 090715B
  7. GRB 090715B: Swift XRT Refined Analysis
  8. GRB 090715A: ROTSE-III Optical Limits
  9. Detection of GRB 090618 by RT-2 Experiment onboard the CORONAS-PHOTON Satellite
  10. GRB090713 optical limit by "Pi of the Sky"
  11. GRB 090621B: MTM-500 optical observations
  12. GRB 090709A: deep optical observation with the 10.4m GTC
  13. GRB 090709A: WHT LIRIS observations
  14. Konus-Wind and Konus-RF observations of GRB 090709A
  15. GRB 090709A: Swift XRT Refined Analysis
  16. GRB 090709A: Swift-BAT refined analysis
  17. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  18. GRB 090709: ROTSE-III Optical Limits
  19. GRB 090709: Swift detection of a bright burst
  20. GRB 090708: ROTSE-III Optical Limits
  21. GRB 090708: Swift detection of a burst
  22. GRB 090704: a long GRB found in INTEGRAL off-line analysis
  23. GRB 090706: Fermi GBM detection
  24. XRF 090702: a long soft GRB localized with INTEGRAL
  25. Konus-Wind observation of GRB 090626
  26. GRB 090628: Swift detection of a burst
  27. Fermi LAT observations of GRB 090626
  28. GRB 090618: SARA Second Epoch Observations
  29. GRB 090625B: a long GRB localized by INTEGRAL
  30. GRB 090623: Fermi GBM detection
  31. GRB 090621B: P60 Observations
  32. GRB 090620: Fermi GBM detecion
  33. Konus-Wind and Konus-RF observations of GRB 090618
  34. GRB 090621B: Swift-XRT refined analysis
  35. GRB 090621B: RTT150 optical observations
  36. GRB 090621B: Optical Observations
  37. GRB 090621A: Swift-BAT refined analysis
  38. GRB 090618 15GHz radio detection
  39. GRB090618: Swift-XRT team refined analysis
  40. GRB 090618: Lick/KAST Spectroscopy
  41. SGR 0418+5729 Fermi/GBM Detection of Pulsations
  42. Konus-RF observation of SGR burst 090605A
  43. Discovery of a new soft gamma repeater source, SGR 0418+5729
  44. GRB 090607: XRT Team Refined Analysis
  45. GRB 090607: Swift detection of a burst
  46. GRB 090528B: Suzaku WAM observation of the prompt emission
  47. GRB 090531B: ROTSE-III Optical Limits
  48. GRB 090530: break in light curve
  49. GRB090530: Swift XRT refined analysis
  50. Strong radio emission from SN 2007bg one year after the explosion - detection of spreading, off-axis GRB jet?
  51. GRB 090530: Swift detection of a burst with an optical counterpart
  52. GRB 090529: optical observations
  53. GRB 090529: Xinglong TNT optical observation
  54. GRB 090529: Swift detection of a burst
  55. GRB 090520D: Fermi GBM detection
  56. GRB 090520C: Fermi GBM detection
  57. GRB 090520B: Fermi GBM detection
  58. GRB 090522 : Fermi GBM detection
  59. GRB 090518 - NOT upper limit
  60. GRB 090516A: Konus-Wind and Swift/BAT joint spectral analysis
  61. GRB 090516C: Fermi GBM detection
  62. GRB 090520 Swift-BAT detection of a burst in ground analysis
  63. GRB 090516: Fermi GBM observation
  64. GRB 090519: Swift detection of a burst
  65. GRB 090518: Swift-XRT refined analysis
  66. GRB 090518: Swift detection of a burst
  67. GRB 090516: Swift-BAT refined analysis
  68. GRB 090516: Swift XRT refined analysis
  69. GRB 090516: Swift detection of a burst
  70. GRB 090515: Swift-XRT refined analysis
  71. GRB 090515: WIYN NIR Upper Limit
  72. GRB 090515: ROTSE-III Optical Limits
  73. GRB 090515: Swift detection of a short burst
  74. GRB 090510: Fermi-LAT follow-up analysis
  75. Konus-Wind observation of GRB 090510
  76. GRB 090510: Swift XRT refined analysis
  77. Fermi LAT detection of GRB 090510
  78. GRB 090510: Swift detection of a short hard burst
  79. GRB 090418A: optical observation
  80. GRB 090509: Swift detection of a burst
  81. GRB 090423: optical limit
  82. GRB 090423: 250 GHz upper limit for a z=8.2 GRB with MAMBO-2 at the IRAM 30m
  83. GRB 080913: 250 GHz upper limit for a z=6.7 GRB with MAMBO-2 at the IRAM 30m
  84. GRB 090427: GROND observations
  85. GRB 090424: YNAO-GMG observations
  86. GRB 090429A: Swift-XRT refined analysis
  87. GRB 090429B: Swift XRT refined analysis
  88. Konus-Wind observation of very bright GRB 090427
  89. GRB 090426: GAO 150cm telescope Optical Observation
  90. GRB 090426: YNAO-GMG observations
  91. GRB 090429B: GROND Observations
  92. GRB 090429B: Super-LOTIS early observations
  93. GRB 090429B: Swift detection of a burst
  94. IPN triangulation of very bright GRB 090427
  95. GRB 090424: Continued R-band monitoring
  96. GRB 090426: Okayama MITSuME optical observation
  97. GRB 090426: Swift detection of a burst with an optical counterpart
  98. GRB 090424: THO optical observations
  99. GRB 090424 optical observations
  100. GRB 090424: Swift-XRT refined analysis

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