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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"

26547 results found.

  1. GRB020531: Second epoch Chandra observations
  2. GRB020604, optical observations
  3. GRB020604, BVRcIc field photometry
  4. GRB020603, BVRcIc field observations
  5. GRB020531, BVRcIc field photometry
  6. IPN triangulation of GRB020604
  7. GRB020531 Optical Observations
  8. GRB020531: Observations with the Chandra X-ray Observatory
  9. GRB 020603: Optical Observations
  10. GRB 020603, R-band observation
  11. GRB020531: Upper Limit for Detection of Two TAROT Sources
  12. IPN triangulation of GRB020603 (possible short/hard GRB)
  13. GRB 020531 optical observations with TAROT
  14. GRB020531, optical observations
  15. GRB020531: optical observations
  16. GRB020531(=H2042): Optical Observations
  17. GRB020531(=H2042): Optical Observations
  18. GRB020531: Optical observations
  19. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  20. GRB020525, optical observations
  21. IPN triangulation of GRB020525
  22. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  23. GRB/XRF 020427, Radio Observations
  24. HST detection of the likely host galaxy of GRB 020124
  25. GRB020405 field photometry at ESO
  26. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  27. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  28. GRB020321 : Optical observations.
  29. XRF 020427
  30. GRB020331: Third Epoch and Revised Second Epoch Optical
  31. GRB 020124: Optical observations
  32. IPN triangulation of GRB020418
  33. GRB020405: VLT observations of the OT environment
  34. GRB020410: BeppoSAX NFI observations refined analysis
  35. GRB 020409, 2-nd epoch optical observations at Terskol.
  36. GRB 020409, No Optical Detection to R = 22
  37. GRB020410: second BeppoSAX NFI observation
  38. GRB 020409: No Evidence for an Optical Afterglow
  39. GRB 020331 Kyoto observation on March 31
  40. GRB 020410, optical observations
  41. BeppoSAX ALERT: possible GRB020410
  42. X-ray afterglow of GRB020321
  43. GRB020331: Confirmation of Afterglow Candidate with Magellan
  44. GRB020331 optical observations with RIMOTS
  45. GRB020124 optical observations with RIBOTS/RIMOTS
  46. GRB 020321: Candidate X-ray Counterparts
  47. GRB020331: Optical Observations of Afterglow Candidate
  48. GRB020406(?), optical observations
  49. Short RXTE/ASM transient 020406; may be a GRB
  50. GRB020405, Radio Observations
  51. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  52. GRB 020405, U-band observations
  53. GRB011212: Optical Observations
  54. GRB 020331: NIR Observations
  55. GRB020331 NIR observation at KPNO (re-submission)
  56. GRB02033 NIR observation at KPNO
  57. GRB020331 field photometry
  58. GRB 020331, NIR observations
  59. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  60. GRB 020322: BeppoSAX observations of the X-ray afterglow
  61. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  62. Near-Infrared Observations of GRB020322 at TIRGO
  63. GRB 020321, Radio Observations
  64. GRB 020322: Optical Observations
  65. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  66. GRB 020321: Optical observations
  67. GRB020317 BVRI field photometry
  68. GRB011211 revised BVRI field photometry
  69. GRB020305 BVRI field photometry
  70. GRB020322 BVRI field photometry
  71. GRB 020322: Optical Sources and Improved Astrometry
  72. GRB020322: Optical Observations
  73. GRB 020321: Optical observations
  74. GRB020317: optical observations
  75. GRB020321 optical observations
  76. GRB020321: BeppoSAX/NFI Observations
  77. GRB020321: a faint BeppoSAX detection
  78. GRB 020317 : KISO Optical Observations
  79. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  80. GRB 020305: Optical Observations
  81. GRB020317, optical observations
  82. GRB 020317: Optical observations
  83. GRB 011121: Third HST Epoch
  84. GRB020305: Properties of the Candidate Optical Afterglow
  85. GRB 011121: HST Observations reveal an intermediate-time multicolor
  86. GRB011121, possible supernova association
  87. GRB011130 (XRF011130) Second Epoch Chandra Observations
  88. XRF/GRB 011030: Detection of the Probable Host Galaxy
  89. Type Ic SN2002bl (SN/GRB?) Radio Observations
  90. GRB020305, optical observations
  91. IPN triangulation of GRB020305 (HETE 1939)
  92. GRB020305 (=H1939): Localization of a GRB by HETE
  93. HST Imaging of the afterglow and host of GRB 011121
  94. IPN detection and localization of Cygnus X-1 flares
  95. GRB020127: Further VLA Observations of Possible Counterparts
  96. RXTE Observations of SGR 1900+14
  97. SGR1900+14 activity
  98. IPN/HETE Detection of Bursts from SGR1900+14
  99. IPN Upper Limits to a GRB Associated With SN2002ap
  100. GRB020124 BVRI field photometry

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