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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"

37730 results found.

  1. GRB040106: Second Epoch Optical Observations
  2. GRB 031220: Optical observations of Chandra X-ray sources
  3. XMM-Newton Images of GRB 040106
  4. GRB040106: optical observations with REM+ROSS
  5. GRB031220: observation at Univercity of Miyazaki
  6. GRB 040106: Optical observations
  7. GRB 040106 : Planned XMM-Newton observation
  8. GRB 040106 : peak flux
  9. GRB 040106 : a long GRB detected with INTEGRAL
  10. IPN triangulation of an intermediate burst from SGR1806-20
  11. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  12. GRB031225a triangulation (annulus)
  13. IPN triangulation of GRB031219 (large error box)
  14. GRB031220: Palomar Observations
  15. GRB 031220 : Kyoto Optical Observation
  16. GRB 031220: Subaru observation
  17. GRB 031220: Optical observation at Tokyo Tech
  18. GRB031220 : Optical Observation of Lulin Observatory
  19. GRB 031203 I-band monitoring
  20. IPN triangulation of GRB031214 (short/hard; very intense; small error box)
  21. GRB 2974 follow-up observations
  22. GRB 031203: Discovery of a dust echo
  23. GRB031214 triangulation (annulus), [repost of GCN2487, subject corrected]
  24. GRB030921 triangulation (annulus)
  25. GRB 031203: SMARTS optical monitoring
  26. GRB 021203: A Normal GRB viewed far off axis?
  27. GRB 031203: Variable Radio Source
  28. GRB 031203: Magellan spectrum of possible GRB host
  29. GRB 031203: Optical/IR Astrometry
  30. IPN/HETE localization of GRB031203B (=H2949; large error box)
  31. GRB031203: ROSAT upper limits suggest XMM-S1 source as the transient
  32. GRB 031203: Deep NIR NTT & VLT observations
  33. GRB031203: K' Photometry of the likely GRB host
  34. GRB 031203: Radio detection
  35. GRB 031203: Further reports on December 4 observations
  36. GRB 031203: IR NTTobservations do not confirm REM detection
  37. GRB031203 : Optical Observation of Lulin Observatory
  38. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  39. GRB 031203: Apparent Spectral Break
  40. GRB 031203: IR REM Observations
  41. GRB031203: Optical Observations
  42. GRB 031203 XMM-Newton observation
  43. GRB 031203: Optical/IR SMARTS Observations
  44. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  45. GRB 031203: further analysis of INTEGRAL data
  46. GRB 031203: A long GRB detected with INTEGRAL
  47. IPN triangulation of GRB031201 (large error box)
  48. IPN triangulation of GRB031130 (large error box)
  49. GRB031111A, prompt optical observations
  50. GRB 030329: Planned XMM-Newton Observation
  51. IPN triangulation of GRB031120 (two large error boxes)
  52. GRB 031111B (= H2925) : Kyoto Optical Observation
  53. IPN/HETE localization of GRB031109 (=H2917; large error box)
  54. IPN detection of activity from SGR1806-20
  55. GRB 031111, Radio observations
  56. IPN triangulation of GRB031114 (large error box)
  57. IPN triangulation of GRB031107 (two large error boxes)
  58. GRB 031111: Optical observations
  59. GRB 031111, optical observations
  60. SN 2003jd (SN/GRB?) -- X-ray Observations
  61. HETE Prompt GRB Spectral Analyses
  62. IPN triangulation of GRB031111 (=H2924): small error box
  63. IPN triangulation of GRB031108 (large error box)
  64. GRB030929/SN2003jd association unlikely based on IPN localiztion
  65. IPN triangulation of GRB031027 (small error box)
  66. IPN triangulation of GRB031026B (large error box)
  67. SN 2003jd (SN/GRB?), Radio Observations
  68. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  69. GRB 031026: Further Ic Observations
  70. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  71. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  72. IPN triangulation of GRB031024 (single error box)
  73. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  74. GRB 031026: Ic Observations
  75. GRB031026 : KISO optical follow-up observation
  76. IPN triangulation of GRB031024 (annulus)
  77. IPN triangulation of GRB031020 (large error box)
  78. IPN triangulation of GRB031016 (two large error boxes)
  79. IBAS alert 1180 refers to a burst from SGR 1806-20
  80. HETE Prompt GRB Light Curves and Color-Color Diagrams
  81. IPN triangulation of GRB031014 (annulus)
  82. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  83. IPN triangulation of GRB031008 (annulus)
  84. IPN detection of continued activity from SGR1806-20
  85. IPN triangulation of GRB031007 (two large error boxes)
  86. XRF 030723: Subaru Optical Observations
  87. IPN triangulation of GRB031004B (annulus)
  88. IPN triangulation of GRB031004A (short/hard; annulus)
  89. IPN triangulation of GRB030929 (short/hard; annulus)
  90. XRF 030824: Early follow-up observation at Kiso observatory
  91. XRF 030824: observations at CFHT
  92. IPN triangulation of GRB030926 (short/hard; large error box)
  93. IPN triangulation of GRB030922B (large error box)
  94. IPN triangulation of GRB030922A (large error box)
  95. IPN triangulation of GRB030921 (large error box)
  96. IPN triangulation of GRB030919 (large error box)
  97. GRB030922 triangulation (annulus)
  98. GRB030913: Subaru Optical Observations
  99. GRB 030913: ROTSE-3c Optical Observations
  100. GRB030913: OT's limit by MASTER

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