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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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subject:"Swift"
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10958 results found.

  1. SGR1900+14 burst localized by HETE
  2. GRB020813: High-resolution optical spectroscopy
  3. Second epoch K band imaging of GRB 020819
  4. K band observation of GRB 020819
  5. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  6. IPN triangulation of GRB020819 (HETE 2275)
  7. GRB 020813: addendum to GCN 1498
  8. GRB020813: V-band decay slope
  9. Polarimetry of GRB020813: evidence for variability
  10. GRB020813: High-Resolution Optical Observations
  11. GRB020813(=H2262): Revised Localization with HETE SXC
  12. GRB020813, optical observations
  13. IPN error box for GRB020813
  14. IPN triangulation of GRB020813
  15. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  16. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  17. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  18. GRB020801: Candidate OT present in DSS
  19. HST Imaging of the Host of GRB 011121
  20. Further refinement to IPN error box for GRB020531
  21. GRB020625 (=H2081): A Long Burst Localized by HETE
  22. GRB/XRF 020427, detection of an underlying system with the VLT
  23. AXP 1E2259+586 optical observations
  24. Fading Optical Source in the Field of GRB020531
  25. GRB020405: polarimetric observations
  26. GRB 020531/Candidate Redshift
  27. GRB020531: Second epoch Chandra observations
  28. GRB020531 Optical Observations
  29. GRB020531: Observations with the Chandra X-ray Observatory
  30. GRB020531: Upper Limit for Detection of Two TAROT Sources
  31. Refined IPN error box for GRB020531
  32. GRB020531(=H2042): Optical Observations
  33. IPN triangulation of the short, hard GRB020531 (=H2042)
  34. GRB020531(=H2042): Optical Observations
  35. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  36. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  37. GRB020405 field photometry at ESO
  38. GRB020331: Third Epoch and Revised Second Epoch Optical
  39. GRB020405: VLT observations of the OT environment
  40. GRB 020409: Optical Observations
  41. X-ray afterglow of GRB020321
  42. GRB020331: Confirmation of Afterglow Candidate with Magellan
  43. GRB020405: VLT optical observations and V band decay slope
  44. GRB020331 optical observations with RIMOTS
  45. GRB020124 optical observations with RIBOTS/RIMOTS
  46. GRB 020405: Moderate-resolution spectroscopy
  47. GRB020331: Optical Observations of Afterglow Candidate
  48. GRB020405: VLT optical observations
  49. GRB020405: VLT spectroscopy
  50. V band observations of GRB020405
  51. GRB011212: Optical Observations
  52. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  53. Near-Infrared Observations of GRB020322 at TIRGO
  54. GRB 020322: Optical Sources and Improved Astrometry
  55. GRB 020322: Optical candidate
  56. XMM-Newton observation of GRB020322
  57. GRB 020317 : KISO Optical Observations
  58. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  59. GRB011130 (XRF011130) Second Epoch Chandra Observations
  60. GRB020305: Subaru Optical Observations
  61. IPN triangulation of GRB020305 (HETE 1939)
  62. GRB020305 (=H1939): Localization of a GRB by HETE
  63. IPN/HETE Detection of Bursts from SGR1900+14
  64. IPN Upper Limits to a GRB Associated With SN2002ap
  65. IPN triangulation of GRB020127 (=H1902)
  66. GRB020127(=H1902): Localization of a Double-Peaked GRB by HETE
  67. IPN triangulation of GRB020124 (HETE 1896)
  68. GRB020124(=H1896): Localization of a Long GRB by HETE
  69. GRB011212, Optical Observations
  70. Optical polarization observations for GRB011211
  71. Color indices of the afterglow of GRB011211
  72. GRB011212: Optical observations at Gunma
  73. GRB 011130: Optical Observations of X-ray and Radio Sources
  74. GRB 011211: TNG Spectroscopic Observations
  75. GRB011212 (=H10001): An X-Ray Rich GRB Detected by HETE
  76. XMM-Newton observation of GRB011211
  77. GRB011130 (=XRF011130): Further analysis of Chandra Target of
  78. GRB 011130: Optical Observations of Chandra Sources
  79. GRB 011130: Optical Observations of Chandra sources
  80. GRB011130 (XRF011130) Chandra Observations
  81. GRB011130 (=XRF011130): Scheduled Target of Opportunity
  82. GRB011130 (=XRF011130): Second Revised Localization by HETE
  83. GRB 011130 I-band Observation
  84. GRB011130 (=XRF011130): Revised Localization of an X-ray
  85. GRB 011121
  86. GRB011130 (=H1864): An X-Ray Rich GRB Detected by HETE
  87. GRB 011121: NIR observations, host galaxy?
  88. GRB 011030: TNG K-band observation
  89. XRF011030: J and K band observations
  90. GRB 011030: K-band observations
  91. GRB 011030 I-band Observation
  92. GRB011019: Subaru Optical Observations
  93. GRB 011030 I-band Observations
  94. GRB 011030 K-band Observations
  95. GRB010921, optical observations
  96. GRB011019: A Faint, X-ray Rich GRB localized by HETE
  97. GRB010928(=H1770): Localization of a Long GRB by HETE
  98. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  99. GRB 010921 DPOSS Images Available
  100. IPN triangulation of GRB010921 (=H1761)

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