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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

19235 results found.

  1. K band observation of GRB 020819
  2. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  3. GRB020813: optical and NIR observations
  4. GRB020813: Fading X-ray Afterglow Observed with Chandra
  5. GRB020812: NIR observations
  6. Polarimetry of GRB020813: evidence for variability
  7. GRB020813 IRAM millimeter observations
  8. GRB 020812: optical observation at Bisei
  9. GRB020813: Early Time Magnitude
  10. Millimeter observation of GRB 020813
  11. GRB 020813 : KISO multiband optical observations
  12. IPN error box for GRB020813
  13. Spectropolarimetry of GRB 020813
  14. GRB020813: optical afterglow
  15. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  16. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  17. HST Imaging of the Host of GRB 011121
  18. GRB020331: Late-time Optical Light Curve (re-submission)
  19. GRB020331: Late-time Optical Light Curve
  20. IPN triangulation of GRB020714
  21. IPN triangulation of GRB020715 (=GRB150702)
  22. IPN triangulation of GRB020714
  23. IPN triangulation of GRB150702
  24. GRB 020124, HST observations of the fading afterglow
  25. IPN triangulation of GRB020708
  26. IPN triangulation of GRB020708
  27. Correction to IPN error box for GRB020706
  28. IPN triangulation of GRB020706
  29. GRB 020625, optical observations
  30. GRB020625 (=H2081): A Long Burst Localized by HETE
  31. The Probable Host Galaxy of GRB/XRF 020427
  32. GRB/XRF 020427, detection of an underlying system with the VLT
  33. SGR-like Bursts from the AXP 1E 2259+586
  34. GRB 020531, simultaneous optical observations
  35. GRB 020531/Candidate Redshift
  36. GRB020531: Detection of Candidate Host Galaxy
  37. GRB020531: Second epoch Chandra observations
  38. GRB020531 Optical observations with TAROT
  39. GRB020531 Optical observations with TAROT
  40. IPN triangulation of GRB020604
  41. GRB020531 Optical Observations
  42. GRB020531: Observations with the Chandra X-ray Observatory
  43. GRB020531, optical observations
  44. GRB020531: optical observations
  45. GRB020531: Optical observations
  46. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  47. IPN triangulation of GRB020525
  48. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  49. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  50. HST detection of the likely host galaxy of GRB 020124
  51. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  52. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  53. GRB020321 : Optical observations.
  54. XRF 020427
  55. GRB 020124: Optical observations
  56. IPN triangulation of GRB020418
  57. GRB020405: VLT observations of the OT environment
  58. IPN triangulation of GRB020413
  59. GRB020405: predicted break
  60. GRB 020331 Kyoto observation on March 31
  61. GRB020410: BeppoSAX NFI observation
  62. GRB020406(?), optical observations
  63. X-ray afterglow of GRB020321
  64. GRB 020321: Candidate X-ray Counterparts
  65. GRB020406(?), optical observations
  66. GRB 020405: Decay index
  67. Short RXTE/ASM transient 020406; may be a GRB
  68. GRB011212: Optical Observations
  69. GRB 020331: NIR Observations
  70. GRB020331 NIR observation at KPNO (re-submission)
  71. GRB02033 NIR observation at KPNO
  72. GRB 020331, NIR observations
  73. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  74. Near-Infrared Observations of GRB020322 at TIRGO
  75. GRB 020321, Radio Observations
  76. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  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. GRB 011121: Third HST Epoch
  82. GRB020305: Properties of the Candidate Optical Afterglow
  83. GRB 011121: HST Observations reveal an intermediate-time multicolor
  84. GRB011130 (XRF011130) Second Epoch Chandra Observations
  85. GRB020305: Subaru Optical Observations
  86. XRF/GRB 011030: Detection of the Probable Host Galaxy
  87. GRB 020305: Candidate optical afterglow
  88. GRB020305, optical observations
  89. IPN triangulation of GRB020305 (HETE 1939)
  90. GRB020305 (=H1939): Localization of a GRB by HETE
  91. HST Imaging of the afterglow and host of GRB 011121
  92. IPN detection and localization of Cygnus X-1 flares
  93. SGR1900+14 activity
  94. IPN/HETE Detection of Bursts from SGR1900+14
  95. IPN Upper Limits to a GRB Associated With SN2002ap
  96. GRB020127: Comparison of Chandra Epochs and Identification of Possible Counterparts
  97. SN2002ap (SN/GRB?) Echelle spectra
  98. SN 2002ap in M74
  99. GRB020127: Chandra Observations and Prospective Counterparts
  100. pre-SN2002ap (SN/GRB?) imaging of M74

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