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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"

45567 results found.

  1. 030716 NOT a GRB
  2. IPN triangulation of GRB030714 (two large error boxes)
  3. IPN triangulation of GRB030715 (two large error boxes)
  4. GRB030329: RTT150 optical observations
  5. GRBlog: Compilation of all GCN Circ. data
  6. IPN detection of renewed activity from SGR1806-20
  7. IPN triangulation of GRB030711 (annulus, =SGR0525-66?)
  8. IPN triangulation of GRB030710 (annulus)
  9. IPN triangulation of GRB030709 (annulus)
  10. GRB030706 triangulation (single large error box)
  11. IPN triangulation of GRB030706 (annulus)
  12. IPN triangulation of GRB030629 (annulus)
  13. GRB030629 triangulation (Konus-Wind -- Helicon annulus)
  14. 030629 NOT a real GRB
  15. GRB030329, optical observation in May
  16. IPN triangulation of GRB030626 (single large error box)
  17. IPN triangulation of GRB030626 (two large error boxes)
  18. GRB030329: second XMM-Newton observation
  19. GRB030418: R optical observations
  20. HETE detection of burst from SGR1806-20
  21. GRB030329 -- RATAN-600 data in April-May
  22. Final IPN error ellipse for GRB021206 (the polarized GRB)
  23. GRB 021206, Radio afterglow candidate
  24. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch
  25. IPN triangulation of GRB030607 (annulus)
  26. IPN triangulation of GRB030606 (two alternate error boxes)
  27. GRB030329, SPM optical observations (Correction of GCN2075 R band)
  28. GRB 030528: Infrared Observations and the Proposed IR Counterpart
  29. IPN triangulation of GRB030605B (annulus)
  30. GRB 030528: Optical Observations
  31. IPN triangulation of GRB030605 (annulus)
  32. GRB 030528: tentative NIR counterpart
  33. GRB 030528, radio observations
  34. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  35. GRB030329, further radio observations at GMRT
  36. GRB030528, BVRI field photometry
  37. IPN triangulation of GRB030601 (annulus)
  38. GRB030329, SPM optical observations
  39. GRB030528: Chandra TOO Planned
  40. GRB 030519B: optical observations.
  41. MASTER: optical observation GRB030601
  42. GRB030528(=H2724): Revised SXC Localization
  43. GRB 030329: optical observations
  44. GRB 030329/SN 2003dh: Jitter Episode
  45. GRB 030528, Teramo optical observation
  46. GRB 030528 Bisei optical observation
  47. GRB030528 (H2724): A long GRB localized by HETE
  48. GRB 030329: Correction to GCN 2254
  49. GRB 030329: Optical Observations
  50. GRB 030528: Optical observations at RIKEN
  51. GRB 030528 (=H2724) Kyoto optical observation
  52. IPN triangulation of GRB030523B (annulus)
  53. GRB 030416: Optical Observations
  54. GRB 030329: Planned XMM-Newton Observation
  55. IPN triangulation of GRB030523 (annulus)
  56. GRB 030329: optical photometry at various french observatories
  57. GRB 030329: optical photometry at Belesta observatory (France)
  58. GRB030329, Optical observations
  59. GRB 030329/SN 2003dh: Possible increase in brightness
  60. GRB 030329: HST ACS Observations of the Host
  61. GRB 030329 Optical Observations
  62. GRB030329: XMM-Newton observation
  63. GRB 021004: HST observations
  64. GRB030324: Further Observations of the Candidate Optical Afterglow
  65. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  66. IPN triangulation of GRB030519B=H2716 (small error box)
  67. GRB 030418: Second Epoch Optical Observations with Magellan
  68. GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM
  69. IPN triangulation of GRB030519 (annulus)
  70. IPN triangulation of GRB030518C (annulus)
  71. IPN triangulation of GRB030518B (annulus)
  72. IPN triangulation of GRB030518A (annulus)
  73. IPN triangulation of GRB030514 (annulus)
  74. HETE GRB030329, correction to Rc Observations in Loiano
  75. IPN triangulation of GRB030513 (annulus)
  76. IPN triangulation of GRB030509B (annulus)
  77. GRB 030329: Optical limit (contemporaneous imaging)
  78. GRB 030501: final TAROT limits
  79. IPN triangulation of GRB030509 (small errror box)
  80. IPN triangulation of GRB030509 - correction
  81. IPN triangulation of GRB030509 (single error box)
  82. GRB030329: RTT150 optical observations
  83. GRB030329, BVRI photometry
  84. GRB030429, refiend optical brightness
  85. GRB 030329: Optical limit (contemporaneous photography)
  86. GRB030418, BVRcIc field photometry
  87. GRB 030429: Redshift of neighbor galaxy
  88. GRB030429, BVRcIc field photometry
  89. GRB 030329: High-Resolution Spectroscopy of the Host
  90. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  91. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  92. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  93. GRB030429: RTT150 optical observations, a possible host galaxy
  94. IPN triangulation of GRB030506 (annulus)
  95. IPN triangulation of GRB030505B (large error box)
  96. IPN triangulation of GRB030505A (annulus)
  97. GRB030329: RTT150 optical observations and upper limit for a host
  98. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  99. GRB030501, optical observation
  100. GRB030501 observation report

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