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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.

Advanced Search Examples (click to copy):

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

32693 results found.

  1. GRB030329 - OT brightens
  2. GRB 030329: OT observations at Kanazawa
  3. GRB030329 15 GHz radio observation
  4. GRB 030329 RBO V Optical Observations
  5. GRB 030329, optical photometry
  6. GRB030329: Near Infrared Observations
  7. GRB 030324: Optical and NIR Observations
  8. GRB 030328, optical photometry
  9. GRB030329: R band light curve by MASTER
  10. GRB030329 - Light curve flattening
  11. GRB 030329: SARA Optical Observations
  12. GRB 030324, optical search
  13. GRB030329 - near contemporaneous optical limits from CONCAM
  14. GRB030329: R and B observations
  15. GRB 030329, optical observations
  16. GRB030329: Optical observations
  17. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  18. GRB030329a: detection by Konus-Wind
  19. GRB 030329: Light curve observed during the change of its slope.
  20. GRB030329, BVRcIc field photometry
  21. GRB030329, SPM optical observations
  22. GRB 030329: Optical Decay
  23. Redshift of GRB 030329
  24. GRB030329: ROTSE network observes steepening of decay curve
  25. GRB 030329, optical photometry
  26. GRB 030329: Optical decay and synthesis
  27. GRB030329 optical observations
  28. GRB030329: optical spectroscopy with the TNG
  29. GRB 030329: Radio Observations
  30. GRB 030329, optical spectroscopy
  31. GRB 030329: still bright
  32. GRB 030329: Optical pre-Imaging
  33. GRB 030329: visual observations
  34. GRB 030329: Upper limit from 5.6 hours before trigger
  35. GRB030328: R optical observation
  36. GRB030328: X-ray Afterglow Observed with Chandra
  37. GRB 030323: Gemini South VRI obsevations.
  38. GRB030329: Optical observations
  39. GRB030329:optical observations by MASTER
  40. GRB 030329: optical observations
  41. GRB 030329, R-band observations
  42. GRB 030329: OT B and R photometry, decline rate
  43. GRB030329: Upper limits from recent and historical observations.
  44. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  45. GRB 030329: Optical Afterglow Observations
  46. GRB 030329: precise position from Kyoto images
  47. GRB 030328 Optical Observations
  48. GRB030328: Decay index
  49. GRB 030328: Optical observations
  50. GRB 030328: optical observations
  51. GRB 030329: Optical afterglow fading
  52. GRB 030328: OT photometry
  53. GRB030328: optical spectroscopy at TNG
  54. GRB030328: optical photometry at the TNG
  55. VLT spectra of GRB 030328
  56. GRB 030328, optical spectroscopy
  57. GRB 030328, optical observations
  58. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  59. GRB 030328: Optical observations
  60. GRB 030328: Finding chart
  61. GRB030323 optical observations
  62. GRB030131, BVRcIc field photometry
  63. IPN triangulation of GRB030325 (final analysis)
  64. GRB030323: Detection on 2003/03/24
  65. GRB 030323: SARA Optical Observations
  66. IPN triangulation of GRB030325 (single small error box)
  67. GRB030324, optical observations
  68. GRB030324, optical observations
  69. GRB 030324: TAROT optical observations
  70. GRB030323: V, R, I photometry
  71. GRB 030324 (HETE #2641): Optical observations
  72. GRB030324, Optical Observations
  73. GRB030323: Upper limits from recent and historical observations.
  74. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  75. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  76. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  77. VLT/FORS2 spectra of GRB 030323
  78. GRB030323, ROTSE-III detection of possible optical counterpart
  79. GRB030323, optical observations
  80. GRB030323, possible optical counterpart
  81. GRB 030324 optical observations
  82. GRB 030320: Optical Observations
  83. IPN triangulation of GRB030320 (small error box)
  84. IPN triangulation of GRB030320
  85. GRB030226, addendum to GCN 1892
  86. IPN upper limit to a GRB associated with SN2003L
  87. GRB 030227: Optical limit at RIKEN
  88. GRB 030226 Optical observations
  89. IPN triangulation of GRB030306 (single small error box - REVISED)
  90. GRB030226: Optical observations at Asiago
  91. IPN triangulation of GRB030306 (two small error boxes)
  92. GRB 030226: Optical observations
  93. GRB030226: Analysis of Chandra data
  94. GRB 030227: Optical observations
  95. GRB030226, BVRc observations
  96. Chandra detection of the X-ray afterglow of GRB 030226
  97. GRB 030226, further optical/NIR imaging
  98. GRB 030226: Ic Observations
  99. GRB030227: Kiso optical upper limit
  100. GRB030227, BVRcIc field photometry

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