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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.

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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').
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10935 results found.

  1. Fading Optical Source in the Field of GRB020531
  2. GRB020405: polarimetric observations
  3. GRB 020531/Candidate Redshift
  4. GRB020531: Second epoch Chandra observations
  5. GRB020531 Optical Observations
  6. GRB020531: Observations with the Chandra X-ray Observatory
  7. GRB020531: Upper Limit for Detection of Two TAROT Sources
  8. Refined IPN error box for GRB020531
  9. GRB020531(=H2042): Optical Observations
  10. IPN triangulation of the short, hard GRB020531 (=H2042)
  11. GRB020531(=H2042): Optical Observations
  12. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  13. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  14. GRB020405 field photometry at ESO
  15. GRB020331: Third Epoch and Revised Second Epoch Optical
  16. GRB020405: VLT observations of the OT environment
  17. GRB 020409: Optical Observations
  18. X-ray afterglow of GRB020321
  19. GRB020331: Confirmation of Afterglow Candidate with Magellan
  20. GRB020405: VLT optical observations and V band decay slope
  21. GRB020331 optical observations with RIMOTS
  22. GRB020124 optical observations with RIBOTS/RIMOTS
  23. GRB 020405: Moderate-resolution spectroscopy
  24. GRB020331: Optical Observations of Afterglow Candidate
  25. GRB020405: VLT optical observations
  26. GRB020405: VLT spectroscopy
  27. V band observations of GRB020405
  28. GRB011212: Optical Observations
  29. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  30. Near-Infrared Observations of GRB020322 at TIRGO
  31. GRB 020322: Optical Sources and Improved Astrometry
  32. GRB 020322: Optical candidate
  33. XMM-Newton observation of GRB020322
  34. GRB 020317 : KISO Optical Observations
  35. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  36. GRB011130 (XRF011130) Second Epoch Chandra Observations
  37. GRB020305: Subaru Optical Observations
  38. IPN triangulation of GRB020305 (HETE 1939)
  39. GRB020305 (=H1939): Localization of a GRB by HETE
  40. IPN/HETE Detection of Bursts from SGR1900+14
  41. IPN Upper Limits to a GRB Associated With SN2002ap
  42. IPN triangulation of GRB020127 (=H1902)
  43. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  44. IPN triangulation of GRB020124 (HETE 1896)
  45. GRB020124(=H1896): Localization of a Long GRB by HETE
  46. GRB011212, Optical Observations
  47. Optical polarization observations for GRB011211
  48. Color indices of the afterglow of GRB011211
  49. GRB011212: Optical observations at Gunma
  50. GRB 011130: Optical Observations of X-ray and Radio Sources
  51. GRB 011211: TNG Spectroscopic Observations
  52. GRB011212 (=H10001): An X-Ray Rich GRB Detected by HETE
  53. XMM-Newton observation of GRB011211
  54. GRB011130 (=XRF011130): Further analysis of Chandra Target of
  55. GRB 011130: Optical Observations of Chandra Sources
  56. GRB 011130: Optical Observations of Chandra sources
  57. GRB011130 (XRF011130) Chandra Observations
  58. GRB011130 (=XRF011130): Scheduled Target of Opportunity
  59. GRB011130 (=XRF011130): Second Revised Localization by HETE
  60. GRB 011130 I-band Observation
  61. GRB011130 (=XRF011130): Revised Localization of an X-ray
  62. GRB 011121
  63. GRB011130 (=H1864): An X-Ray Rich GRB Detected by HETE
  64. GRB 011121: NIR observations, host galaxy?
  65. GRB 011030: TNG K-band observation
  66. XRF011030: J and K band observations
  67. GRB 011030: K-band observations
  68. GRB 011030 I-band Observation
  69. GRB011019: Subaru Optical Observations
  70. GRB 011030 I-band Observations
  71. GRB 011030 K-band Observations
  72. GRB010921, optical observations
  73. GRB011019: A Faint, X-ray Rich GRB localized by HETE
  74. GRB010928(=H1770): Localization of a Long GRB by HETE
  75. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  76. GRB 010921 DPOSS Images Available
  77. IPN triangulation of GRB010921 (=H1761)
  78. H1761: A Bright GRB Detected by HETE
  79. Probable SGR or Short Duration GRB Detected by HETE
  80. BeppoSAX/GRBM detection of GRB010728
  81. GRB 010222 - WHT BVRI images
  82. GRB010629: Optical Observations
  83. SGR1900+14: High Fluence Burst Localized by HETE
  84. GRB010629: A Burst Localized by HETE
  85. SGR1900+14: Second Burst Localized by HETE
  86. SGR1900+14: A Burst Localized by HETE
  87. SGR1806-20: A Second, Intense Burst Localized by HETE
  88. SGR1806-20: Localization by HETE
  89. GRB010214, optical observations
  90. GRB Observation Report
  91. REVISED LOCATION OF GRB010326A
  92. GRB010326B: Localization by HETE (2nd GRB for this date)
  93. GRB010326: Refined Localization by HETE
  94. GRB010326: Localization by HETE
  95. Optical Observations of GRB 010324
  96. GRB 010222 - HEGRA GeV/TeV Observations
  97. GRB010222, possible increase of optical decay slope
  98. GRB 010220: Near-IR Observations
  99. GRB 010222: Near-IR Observations
  100. GRB010214, candidate optical afterglow

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