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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').
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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"

45532 results found.

  1. GRB031203: Planned XMM-Newton observation II
  2. GRB 031203: IR REM Observations
  3. GRB031203: Optical Observations
  4. GRB 031203 XMM-Newton observation
  5. GRB 031203: Optical/IR SMARTS Observations
  6. GRB031203: Planned XMM-Newton observation
  7. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  8. GRB 031203: further analysis of INTEGRAL data
  9. GRB 031203: A long GRB detected with INTEGRAL
  10. IPN triangulation of GRB031201 (large error box)
  11. IPN triangulation of GRB031130 (large error box)
  12. GRB031111A, prompt optical observations
  13. GRB 030329: Planned XMM-Newton Observation
  14. IPN triangulation of GRB031120 (two large error boxes)
  15. GRB 031111B (= H2925) : Kyoto Optical Observation
  16. IPN/HETE localization of GRB031109 (=H2917; large error box)
  17. IPN detection of activity from SGR1806-20
  18. GRB 031111, Radio observations
  19. IPN triangulation of GRB031114 (large error box)
  20. IPN triangulation of GRB031107 (two large error boxes)
  21. GRB 031111: Optical observations
  22. GRB 031111, optical observations
  23. SN 2003jd (SN/GRB?) -- X-ray Observations
  24. HETE Prompt GRB Spectral Analyses
  25. IPN triangulation of GRB031111 (=H2924): small error box
  26. XRF031109 (=H2919): A very long XRF localized by HETE
  27. IPN triangulation of GRB031108 (large error box)
  28. GRB031026: 1.2mm upper limit with MAMBO at the IRAM 30m
  29. GRB030929/SN2003jd association unlikely based on IPN localiztion
  30. IPN triangulation of GRB031027 (small error box)
  31. IPN triangulation of GRB031026B (large error box)
  32. Lulin optical follow-up observations of GRB031026
  33. SN 2003jd (SN/GRB?), Radio Observations
  34. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  35. GRB 031026: Further Ic Observations
  36. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  37. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  38. IPN triangulation of GRB031024 (single error box)
  39. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  40. GRB 031026: Ic Observations
  41. GRB031026 : KISO optical follow-up observation
  42. IPN triangulation of GRB031024 (annulus)
  43. IPN triangulation of GRB031020 (large error box)
  44. GRB030329: radio observations at RT-22 (CrAO)
  45. IPN triangulation of GRB031016 (two large error boxes)
  46. IBAS alert 1180 refers to a burst from SGR 1806-20
  47. HETE Prompt GRB Light Curves and Color-Color Diagrams
  48. IPN triangulation of GRB031014 (annulus)
  49. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  50. XRF 030824: additional observations at CFHT
  51. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  52. IPN triangulation of GRB031008 (annulus)
  53. SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
  54. IPN detection of continued activity from SGR1806-20
  55. IPN triangulation of GRB031007 (two large error boxes)
  56. XRF 030723: Subaru Optical Observations
  57. IPN triangulation of GRB031004B (annulus)
  58. IPN triangulation of GRB031004A (short/hard; annulus)
  59. IPN triangulation of GRB030929 (short/hard; annulus)
  60. A burst from SGR 1806-20 detected with IBAS
  61. XRF 030824: Early follow-up observation at Kiso observatory
  62. XRF 030824: observations at CFHT
  63. IPN triangulation of GRB030926 (short/hard; large error box)
  64. IPN triangulation of GRB030922B (large error box)
  65. XRF 030723: Detection of the likely host galaxy
  66. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  67. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  68. IPN triangulation of GRB030922A (large error box)
  69. IPN triangulation of GRB030921 (large error box)
  70. IPN triangulation of GRB030919 (large error box)
  71. GRB030922 triangulation (annulus)
  72. GRB030913: Subaru Optical Observations
  73. GRB 030913: ROTSE-3c Optical Observations
  74. GRB030913: OT's limit by MASTER
  75. GRB030921 triangulation (annulus)
  76. GRB030913, candidate afterglow observations
  77. GRB 030913, optical candidate
  78. GRB030913: AAVSO optical observations
  79. GRB 030913, BOOTES observations
  80. GRB030913 (=H2849): Confirmation of the Flight Localization
  81. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  82. GRB030913 (=H2849): TAROT Observations
  83. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  84. Magellan Observations of GRB030725 (=H2779)
  85. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  86. IPN triangulation of GRB030908 (annulus)
  87. GRB 030913: Optical limit at RIKEN
  88. XRF 020427: Gemini-South Spectroscopic Observations of the Host
  89. XRF030824: Optical observations
  90. IPN triangulation of GRB030903 (large error box)
  91. IBAS detection of bursts from SGR 1806-20
  92. Radio Observations of SGR1806-20
  93. IPN triangulation of GRB030831 (annulus)
  94. IPN triangulation of GRB030830 (large error box)
  95. GRB 030824: Candidate Follow-Up
  96. INTEGRAL ToO OBSERVATIONS OF SGR1806-20: CALL FOR CORRELATED OBSERVATIONS
  97. IPN triangulation of GRB030827 (large error box)
  98. GRB 030823 observation at Ouda
  99. XRF030824: Second-epoch Palomar observations
  100. XRF030824: optical observations

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