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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"

36195 results found.

  1. GRB 020418: Optical observations
  2. GRB 020124: Optical observations
  3. GRB 020418: Optical observations
  4. IPN triangulation of GRB020418
  5. GRB020405: VLT observations of the OT environment
  6. GRB020410: BeppoSAX NFI observations refined analysis
  7. GRB 020409: Optical Observations
  8. Mars Odyssey joins the IPN
  9. IPN triangulation of GRB020413
  10. GRB 020409, 2-nd epoch optical observations at Terskol.
  11. GRB 020409: Optical observations
  12. GRB 020409, No Optical Detection to R = 22
  13. GRB 020409: No Evidence for an Optical Afterglow
  14. GRB 020409, 2nd epoch optical observations
  15. GRB 020331 Kyoto observation on March 31
  16. GRB 020409
  17. GRB 020409 SARA Observations
  18. GRB "020411"
  19. GRB 020409, No Optical Detection to R = 20
  20. GRB020410: BeppoSAX NFI observation
  21. GRB 020409: Optical observations
  22. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  23. GRB 020410, optical observations
  24. BeppoSAX ALERT: possible GRB020411
  25. GRB 020409, optical observations
  26. GRB 020409: Optical Observations
  27. GRB020406(?), optical observations
  28. GRB020410, optical observations
  29. BeppoSAX ALERT: possible GRB020410
  30. X-ray afterglow of GRB020321
  31. BeppoSAX GRB : GRB020409
  32. GRB020405: VLT optical observations and V band decay slope
  33. GRB020331 optical observations with RIMOTS
  34. GRB020124 optical observations with RIBOTS/RIMOTS
  35. GRB 020321: Candidate X-ray Counterparts
  36. ASM GRB candidate 020406 refined error box
  37. GRB 020405: Moderate-resolution spectroscopy
  38. GRB020406(?), optical observations
  39. GRB020405: VLT optical observations
  40. Revised Photometry of the Optical Afterglow of GRB 020405
  41. GRB020405: OT observations
  42. GRB 020331: Candidate Optical Afterglow
  43. GRB 020405: Decay index
  44. Short RXTE/ASM transient 020406; may be a GRB
  45. GRB020405, Radio Observations
  46. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  47. GRB 020405, U-band observations
  48. GRB 020405: Optical afterglow candidate
  49. IPN localization of GRB020405
  50. GRB011212: Optical Observations
  51. GRB 020331: NIR Observations
  52. GRB 020331: NIR Observations
  53. GRB020331 NIR observation at KPNO (re-submission)
  54. GRB02033 NIR observation at KPNO
  55. GRB020331 field photometry
  56. GRB 020331 Optical Observations
  57. GRB 020331, NIR observations
  58. GRB 020331: Optical observations
  59. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  60. GRB 020321: Infrared observations
  61. GRB 020322: BeppoSAX observations of the X-ray afterglow
  62. SN 2002ap - peak brightness date (SN/GRB?)
  63. GRB 020322, Radio observations
  64. Near-Infrared Observations of GRB020322 at TIRGO
  65. GRB 020321, Radio Observations
  66. GRB 020322: Optical Observations
  67. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  68. GRB 020321: Optical observations
  69. GRB020317 BVRI field photometry
  70. GRB011211 revised BVRI field photometry
  71. GRB020305 BVRI field photometry
  72. GRB020322 BVRI field photometry
  73. GRB 020322 optical observations
  74. GRB 020322 optical observation
  75. GRB020317 : Near IR Observations from Mt Abu Observatory
  76. GRB 020322: Optical Sources and Improved Astrometry
  77. GRB020322, optical observations
  78. GRB 020322: Optical candidate
  79. GRB020322: BeppoSAX/NFI Observations
  80. Bepposax GRB020322 The second springtime BSAX GRB
  81. GRB 020321: Optical observations
  82. GRB 011121: Fourth Epoch of HST Imaging
  83. GRB020317: optical observations
  84. GRB020321 optical observations
  85. GRB020321: BeppoSAX/NFI Observations
  86. GRB020321: a faint BeppoSAX detection
  87. GRB 020317 : KISO Optical Observations
  88. BeppoSAX ALERT: GRB020321, the "Springtime Burst"
  89. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  90. GRB 020305: Optical Observations
  91. GRB020317, optical observations
  92. GRB 020317: Optical observations
  93. GRB 011121: Third HST Epoch
  94. GRB020305: Properties of the Candidate Optical Afterglow
  95. GRB 011121: HST Observations reveal an intermediate-time multicolor
  96. GRB011121, possible supernova association
  97. GRB011130 (XRF011130) Second Epoch Chandra Observations
  98. GRB020305: Subaru Optical Observations
  99. GRB 020305: Optical observations
  100. XRF/GRB 011030 Images

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