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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"

21907 results found.

  1. IPN triangulation of GRB020904
  2. IPN detection of a burst from SGR1900+14
  3. INTEGRAL GRBs added to GCN
  4. GRB020812: negative optical observations
  5. GRB 020812: optical observation at Kyoto University
  6. Second epoch K band imaging of GRB 020819
  7. GRB020813, Baade 6.5m data now available
  8. GRB 020813 : HST observations
  9. GRB 020812: early time optical observation at Ouda Station
  10. GRB020813: Magellan BVRI Photometry
  11. GRB 020819: Optical observations
  12. GRB020813: optical and NIR observations
  13. GRB020813: Fading X-ray Afterglow Observed with Chandra
  14. GRB020813, UBVRI field calibration
  15. Polarimetry of GRB020813: evidence for variability
  16. GRB020812: optical observations
  17. GRB020813: High-Resolution Optical Observations
  18. GRB 020812: optical observation at Bisei
  19. GRB020812: optical observations
  20. GRB020813, optical observations
  21. GRB020813, astrometric position
  22. GRB 020812 optical observation
  23. GRB 020714, optical observations
  24. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  25. HST Imaging of the Host of GRB 011121
  26. GRB020801, optical afterglow candidate
  27. GRB020331: Late-time Optical Light Curve (re-submission)
  28. GRB020331: Late-time Optical Light Curve
  29. IPN triangulation of GRB020714
  30. IPN triangulation of GRB150702
  31. GRB 020410: Discovery of Probable OT by HST
  32. IPN triangulation of GRB020708
  33. IPN triangulation of GRB020708
  34. Correction to IPN error box for GRB020706
  35. IPN triangulation of GRB020706
  36. GRB 020705: Optical observations
  37. GRB 020625: Optical observations
  38. GRB 020531: optical photometry of Chandra sources
  39. The Probable Host Galaxy of GRB/XRF 020427
  40. GRB/XRF 020427, detection of an underlying system with the VLT
  41. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  42. AXP 1E2259+586 optical observations
  43. Fading Optical Source in the Field of GRB020531
  44. GRB 020531, INT+WFC deep optical upper limits
  45. GRB020405: polarimetric observations
  46. GRB 020531, simultaneous optical observations
  47. GRB020531: Second epoch Chandra observations
  48. GRB020604, optical observations
  49. GRB020604, BVRcIc field photometry
  50. GRB020603, BVRcIc field observations
  51. GRB020531, BVRcIc field photometry
  52. GRB 020531, Radio Observations
  53. IPN triangulation of GRB020604
  54. GRB020531 Optical Observations
  55. GRB020531: Observations with the Chandra X-ray Observatory
  56. GRB020531, optical observations
  57. GRB020531: optical observations
  58. GRB020531(=H2042): Optical Observations
  59. GRB020531(=H2042): Optical Observations
  60. GRB020525, optical observations
  61. IPN triangulation of GRB020525
  62. GRB020405 field photometry at ESO
  63. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  64. XRF 020427
  65. GRB 020124: Optical observations
  66. IPN triangulation of GRB020418
  67. GRB020405: VLT observations of the OT environment
  68. GRB020405: predicted break
  69. GRB 020409: No Evidence for an Optical Afterglow
  70. GRB 020331 Kyoto observation on March 31
  71. GRB 020409
  72. BeppoSAX ALERT: possible GRB020411
  73. X-ray afterglow of GRB020321
  74. GRB020331 optical observations with RIMOTS
  75. GRB020124 optical observations with RIBOTS/RIMOTS
  76. GRB 020321: Candidate X-ray Counterparts
  77. ASM GRB candidate 020406 refined error box
  78. GRB020406(?), optical observations
  79. Short RXTE/ASM transient 020406; may be a GRB
  80. GRB020405, Radio Observations
  81. GRB 020405, U-band observations
  82. IPN localization of GRB020405
  83. GRB020331 NIR observation at KPNO (re-submission)
  84. GRB02033 NIR observation at KPNO
  85. GRB020331 field photometry
  86. GRB 020331, NIR observations
  87. GRB 020322: BeppoSAX observations of the X-ray afterglow
  88. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  89. GRB 020322, Radio observations
  90. Near-Infrared Observations of GRB020322 at TIRGO
  91. GRB 020321, Radio Observations
  92. GRB 020322: Optical Observations
  93. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  94. GRB 020321: Optical observations
  95. GRB020317 BVRI field photometry
  96. GRB011211 revised BVRI field photometry
  97. GRB020305 BVRI field photometry
  98. GRB020322 BVRI field photometry
  99. GRB 020322: Optical Sources and Improved Astrometry
  100. GRB020317: optical observations

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