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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"

32735 results found.

  1. GRB 080906: GROND observations of the optical/NIR afterglow
  2. GRB 080905B: Swift-XRT Refined Analysis
  3. GRB 080905B: VLT redshift
  4. GRB 080905A: NOT and VLT observations
  5. GRB 080905B, Swift-BAT refined analysis
  6. GRB 080905A, Swift-BAT refined analysis
  7. GRB 080905A: Swift-XRT Refined Analysis
  8. GRB 080825C: Fermi GBM Spectral Analysis
  9. GRB080825C: Fermi-LAT observations
  10. GRB 080903: Swift/UVOT Observations
  11. GRB 080903: Swift-XRT Refined Analysis
  12. GRB 080903, Swift-BAT refined analysis
  13. GRB 080903: optical observations
  14. GRB 080903: Liverpool Telescope observations
  15. GRB 080903: Astrotel-Caucasus optical observations
  16. GRB 080903: Optical afterglow candidate
  17. GRB 080903: ROTSE-III Optical Limits
  18. Recent VLA non-detection of SGR 0501+4516
  19. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  20. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  21. nIR observations of SGR 0501+4516
  22. INTEGRAL ToO observation of SGR0501+4516
  23. SGR 0501+4516: Confirmation of the NIR counterpart
  24. GRB080828: Swift/UVOT Upper Limits
  25. SGR 0501+4516: Detection of possible optical counterpart
  26. SGR 0501+4516: WHT observations of the possible near-infrared counterpart
  27. GRB080825B: Swift/UVOT Upper Limits
  28. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  29. Swift-BAT trigger 322590 is not a GRB
  30. VLA non-detection of SGR 0501+4516
  31. Radio Detection of SGR 0501+4516: Retraction
  32. SGR 0501+4516: Decline in Activity
  33. SGR 0501+4516: Proximity to supernova remnant HB9
  34. Enhanced Swift-XRT position of SGR 0501+4516
  35. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  36. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  37. Konus-Wind observation of GRB 080825B
  38. GRB 080825B: Swift-XRT team analysis
  39. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  40. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  41. GRB080825: Afterglow confirmation and redshift estimate
  42. Suzaku ToO Observation of SGR 0501+4516
  43. GRB 080825B - optical counterpart candidate
  44. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  45. Konus-Wind observations of new SGR 0501+4516
  46. Radio Detection of SGR 0501+4516
  47. SGR 0501+4516: MDM Optical Observations
  48. GRB 080822B, Swift-BAT refined analysis
  49. SGR 0501+4516: Astrotel-Caucasus optical observations
  50. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  51. SGR 0501+4516: WSRT Radio Observations
  52. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  53. GRB 080822B: MASTER optical observation
  54. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  55. SGR 0501+4516: optical observations
  56. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  57. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  58. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  59. GRB 080822B: Swift detection of a burst
  60. GRB 080822 (SGR 0501+4516): archival optical observations
  61. New Soft Gamma Repeater 0501+4516 was GRB 080822
  62. GRB080810 - optical observations
  63. GRB080810: optical observations
  64. Radio detection of GRB 080810 with the VLA
  65. GRB 080810: RTT150 optical observations
  66. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  67. GLAST Burst Monitor detection of GRB 080810
  68. GRB 080810: Liverpool and Faulkes North observations
  69. GRB080810: MITSuME optical observation
  70. First GLAST Burst Monitor GRB Circulars
  71. GRB 080810: Swift/UVOT Refined Analysis
  72. GRB 080810: optical observations
  73. GRB 080810: Liverpool Telescope observations
  74. GRB 080810: D50 optical observation
  75. GRB 080810: Kanazawa optical observation
  76. GRB 080810: OSN follow-up
  77. GRB 080810: Observations from NOT
  78. GRB 080810: RTT150 optical observations
  79. GRB 080810: Swift-XRT Team refined analysis
  80. GRB 080810: KANATA optical-NIR observation, update
  81. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  82. GRB 080810: Keck/HIRES Spectroscopy
  83. GRB 080810, Swift-BAT refined analysis
  84. GRB 080810 : optical observation with KANATA
  85. GRB 080723B: GROND upper limits
  86. GRB 080723B: XMM-Newton observation
  87. GRB 080805: VLT redshift update
  88. GRB 080805: Faulkes Telescope South optical observations
  89. GRB 080804: GROND observations
  90. GRB 080727B: Late VLT imaging
  91. GRB 080804: ATCA Radio Observations
  92. GRB 080805: Swift-XRT Refined Analysis
  93. GRB 080805: Swift/UVOT Upper Limits
  94. GRB 080804: Swift-XRT Refined Analysis
  95. GRB 080804: Swift/UVOT Refined Analysis
  96. GRB 080805, Swift-BAT refined analysis
  97. GRB 080804, Swift-BAT refined analysis
  98. GRB080804: Gemini South redshift confirmation
  99. GRB 080804: Faulkes Telescope South observations
  100. GRB 080805: VLT redshift

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