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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"

42674 results found.

  1. GRB 080905A: NOT and VLT observations
  2. GRB 080905B: Enhanced Swift-XRT position
  3. GRB 080905B, Swift-BAT refined analysis
  4. GRB 080905A, Swift-BAT refined analysis
  5. GRB 080906: Swift detection of a burst with optical afterglow
  6. GRB 080905A: Swift-XRT Refined Analysis
  7. GRB 080825C: Fermi GBM Spectral Analysis
  8. GRB080825C: Fermi-LAT observations
  9. GRB 080905B: Swift detection of a burst with possible optical counterpart
  10. GRB 080905: R & I-band optical observations
  11. GRB 080905: Swift detection of a probably-short burst
  12. GRB 080903: Swift/UVOT Observations
  13. GRB 080903: Swift-XRT Refined Analysis
  14. GRB 080903: Enhanced Swift-XRT position
  15. GRB 080903, Swift-BAT refined analysis
  16. GRB 080903: optical observations
  17. GRB 080903: Liverpool Telescope observations
  18. GRB 080903: Astrotel-Caucasus optical observations
  19. GRB 080903: Optical afterglow candidate
  20. GRB 080903: TAROT Calern observatory optical observations
  21. GRB 080903: Swift detection of a burst
  22. Recent VLA non-detection of SGR 0501+4516
  23. GRB 080830: Fermi Gamma-ray Burst Monitor detection
  24. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  25. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  26. nIR observations of SGR 0501+4516
  27. INTEGRAL ToO observation of SGR0501+4516
  28. SGR 0501+4516: Confirmation of the NIR counterpart
  29. GRB080828: Swift/UVOT Upper Limits
  30. SGR 0501+4516: Detection of possible optical counterpart
  31. SGR 0501+4516: WHT observations of the possible near-infrared counterpart
  32. GRB080825B: Swift/UVOT Upper Limits
  33. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  34. Swift-BAT trigger 322590 is not a GRB
  35. VLA non-detection of SGR 0501+4516
  36. Radio Detection of SGR 0501+4516: Retraction
  37. Swift trigger 322590: BAT detection of a possible burst
  38. SGR 0501+4516: XMM-Newton monitoring schedule
  39. GRB 080828: SuperAGILE GRB Localization
  40. SGR 0501+4516: Decline in Activity
  41. SGR 0501+4516: Proximity to supernova remnant HB9
  42. Enhanced Swift-XRT position of SGR 0501+4516
  43. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  44. SGR 0501+4516: Swift XRT measure of the spin period
  45. GRB080823: Fermi Gamma-ray Burst Monitor detection
  46. GRB 080824: Fermi Gamma Ray Burst Monitor detection
  47. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  48. Konus-Wind observation of GRB 080825B
  49. GRB080825C: GLAST Burst Monitor detection
  50. GRB 080825B: Swift-XRT team analysis
  51. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  52. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  53. GRB080825: Afterglow confirmation and redshift estimate
  54. Suzaku ToO Observation of SGR 0501+4516
  55. GRB 080825B - optical counterpart candidate
  56. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  57. GRB 080825B: GRB Localization by SuperAGILE
  58. Konus-Wind observations of new SGR 0501+4516
  59. Radio Detection of SGR 0501+4516
  60. SGR 0501+4516: MDM Optical Observations
  61. GRB 080822B, Swift-BAT refined analysis
  62. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  63. SGR 0501+4516: WSRT Radio Observations
  64. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  65. GRB 080822B: MASTER optical observation
  66. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  67. SGR 0501+4516: optical observations
  68. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  69. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  70. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  71. GRB 080822B: Swift detection of a burst
  72. GRB080818B: GLAST Burst Monitor detection
  73. Third event from SGR 0501+4516
  74. GRB 080822 (SGR 0501+4516): archival optical observations
  75. New Soft Gamma Repeater 0501+4516 was GRB 080822
  76. GRB 080822: Swift detection of a short burst
  77. GLAST Burst Monitor detection of a GRB: 080816B
  78. GLAST Burst Monitor detection of GRB 080818
  79. GLAST Burst Monitor detection of GRB080817B
  80. GLAST Burst Monitor detection of GRB 080817
  81. GLAST Burst Monitor detection of GRB080816
  82. GRB080810 - optical observations
  83. GRB080810: optical observations
  84. GLAST Burst Monitor detection of GRB 080812
  85. Radio detection of GRB 080810 with the VLA
  86. GRB 080810: RTT150 optical observations
  87. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  88. GLAST Burst Monitor detection of GRB 080810
  89. GRB 080810: Liverpool and Faulkes North observations
  90. GRB 080810: RTT150 optical observations
  91. First GLAST Burst Monitor GRB Circulars
  92. GRB 080810: Swift/UVOT Refined Analysis
  93. GRB 080810: optical observations
  94. GRB 080810: Liverpool Telescope observations
  95. GRB 080810: OSN follow-up
  96. GRB 080810: Observations from NOT
  97. GRB 080810: RTT150 optical observations
  98. GRB 080810: Swift-XRT Team refined analysis
  99. GRB 080810: Enhanced Swift-XRT position
  100. GRB 080810: KANATA optical-NIR observation, update

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