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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"

32720 results found.

  1. GRB 080903: Optical afterglow candidate
  2. GRB 080903: ROTSE-III Optical Limits
  3. Recent VLA non-detection of SGR 0501+4516
  4. SGR 0501+4516: Spin Down Rate and Inferred Dipole Magnetic Field
  5. SGR 0501+4516: preliminary results of the first XMM-Newton observation
  6. nIR observations of SGR 0501+4516
  7. INTEGRAL ToO observation of SGR0501+4516
  8. SGR 0501+4516: Confirmation of the NIR counterpart
  9. GRB080828: Swift/UVOT Upper Limits
  10. SGR 0501+4516: Detection of possible optical counterpart
  11. SGR 0501+4516: WHT observations of the possible near-infrared counterpart
  12. GRB080825B: Swift/UVOT Upper Limits
  13. GRB 080828: Swift-XRT detection of a possible X-ray afterglow
  14. Swift-BAT trigger 322590 is not a GRB
  15. VLA non-detection of SGR 0501+4516
  16. Radio Detection of SGR 0501+4516: Retraction
  17. SGR 0501+4516: Decline in Activity
  18. SGR 0501+4516: Proximity to supernova remnant HB9
  19. Enhanced Swift-XRT position of SGR 0501+4516
  20. SGR 0501+4516: GMRT Radio Observation at 618 MHz
  21. GRB 080825B: pseudo-z= 0.83 from prompt emission spectrum
  22. Konus-Wind observation of GRB 080825B
  23. GRB 080825B: Swift-XRT team analysis
  24. SGR 0501+4516: Fermi GBM (formerly GLAST Burst Monitor) observations of three exceptionally intense outbursts
  25. Soft Gamma Repeater SGR 0501+4516: GBM Detection of multiple bursts
  26. GRB080825: Afterglow confirmation and redshift estimate
  27. Suzaku ToO Observation of SGR 0501+4516
  28. GRB 080825B - optical counterpart candidate
  29. SGR 0501+4516: radio pulsar searches with GBT and WSRT
  30. Konus-Wind observations of new SGR 0501+4516
  31. Radio Detection of SGR 0501+4516
  32. SGR 0501+4516: MDM Optical Observations
  33. GRB 080822B, Swift-BAT refined analysis
  34. SGR 0501+4516: Astrotel-Caucasus optical observations
  35. SGR 0501+4516: UKIRT detection of possible infra-red counterpart
  36. SGR 0501+4516: WSRT Radio Observations
  37. Trigger 321551: Continued Large Flaring of SGR 0501+4516
  38. GRB 080822B: MASTER optical observation
  39. New Soft Gamma Repeater 0501+4516 (GRB 080822): GLAST Burst Monitor detection
  40. SGR 0501+4516: optical observations
  41. Swift Trigger 321481: A Large Flare from SGR 0501+4516
  42. SGR 0501+4516: Swift-BAT refined analysis of the 3 discovery events
  43. Discovery of the Spin Period of the New Soft Gamma Repeater SGR 0501+4516
  44. GRB 080822B: Swift detection of a burst
  45. GRB 080822 (SGR 0501+4516): archival optical observations
  46. New Soft Gamma Repeater 0501+4516 was GRB 080822
  47. GRB080810 - optical observations
  48. GRB080810: optical observations
  49. Radio detection of GRB 080810 with the VLA
  50. GRB 080810: RTT150 optical observations
  51. GRB 080810: Konus-Wind and Swift/BAT joint spectral analysis
  52. GLAST Burst Monitor detection of GRB 080810
  53. GRB 080810: Liverpool and Faulkes North observations
  54. GRB080810: MITSuME optical observation
  55. First GLAST Burst Monitor GRB Circulars
  56. GRB 080810: Swift/UVOT Refined Analysis
  57. GRB 080810: optical observations
  58. GRB 080810: Liverpool Telescope observations
  59. GRB 080810: D50 optical observation
  60. GRB 080810: Kanazawa optical observation
  61. GRB 080810: OSN follow-up
  62. GRB 080810: Observations from NOT
  63. GRB 080810: RTT150 optical observations
  64. GRB 080810: Swift-XRT Team refined analysis
  65. GRB 080810: KANATA optical-NIR observation, update
  66. GRB 080810: ROTSE-III Prompt Detection of Optical Counterpart
  67. GRB 080810: Keck/HIRES Spectroscopy
  68. GRB 080810, Swift-BAT refined analysis
  69. GRB 080810 : optical observation with KANATA
  70. GRB 080723B: GROND upper limits
  71. GRB 080723B: XMM-Newton observation
  72. GRB 080805: VLT redshift update
  73. GRB 080805: Faulkes Telescope South optical observations
  74. GRB 080804: GROND observations
  75. GRB 080727B: Late VLT imaging
  76. GRB 080804: ATCA Radio Observations
  77. GRB 080805: Swift-XRT Refined Analysis
  78. GRB 080805: Swift/UVOT Upper Limits
  79. GRB 080804: Swift-XRT Refined Analysis
  80. GRB 080804: Swift/UVOT Refined Analysis
  81. GRB 080805, Swift-BAT refined analysis
  82. GRB 080804, Swift-BAT refined analysis
  83. GRB080804: Gemini South redshift confirmation
  84. GRB 080804: Faulkes Telescope South observations
  85. GRB 080805: VLT redshift
  86. GRB 080805: Afterglow confirmation
  87. GRB 080805: GROND detection of possible afterglow
  88. GRB 080804: UVES redshift
  89. GRB 080804: ROTSE-III Detection of Optical Counterpart
  90. GRB 080802: Swift/UVOT Upper Limits
  91. GRB 080802: Swift-XRT Refined Analysis
  92. GRB 080802: UVI Telescope Upper Limit
  93. GRB 080802, Swift-BAT refined analysis
  94. GRB 080727C: Suzaku WAM observation of the prompt emission
  95. GRB 080727B: IR photometry
  96. GRB 080727A: Early IR observations
  97. GRB 080727C: TAROT Calern observatory optical observations
  98. GRB 080727B: KAIT photometry and an early lightcurve break
  99. GRB 080727B: GROND redshift limit
  100. GRB 080727C, Swift-BAT refined analysis

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