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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"

28254 results found.

  1. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  2. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  3. XRF 020427: Gemini-South Spectroscopic Observations of the Host
  4. XRF030824: Optical observations
  5. IPN triangulation of GRB030903 (large error box)
  6. IPN triangulation of GRB030827 (large error box)
  7. GRB030823: optical observations
  8. GRB030823: optical observation at Tokyo Tech
  9. Lulin follow-up observations of GRB030823
  10. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  11. IPN detection of continued activity from SGR1806-20
  12. GRB 030817 = H2808 TAROT optical observations
  13. SGR 1808-20 (=H2802): A Possible new SGR
  14. XRF030723(=H2777): Chandra Fading X-ray Afterglow Confirmed
  15. XRF 030723: Detection of a rebrightening in the optical afterglow
  16. XRF030723, BVRcIc field photometry update
  17. IPN triangulation of GRB030801 (large error box)
  18. GRB021206 optical counterpart upper limit
  19. IPN triangulation of GRB030726 (large error box)
  20. IPN triangulation of GRB030721 (large error box)
  21. XRF030723 Radio Observations
  22. XRF 030723: confirmation of fading optical counterpart
  23. XRF030723(=H2777): Chandra Observations
  24. GRB030723: Upper limits from historical observations
  25. XRF030723: Palomar observations and proposed counterpart
  26. GRB030725 (=H2779): A Bright GRB Localized by HETE
  27. XRF030723 (= H2777): Chandra Observations Scheduled
  28. XRF030723, BVRcIc field photometry correction
  29. XRF030723, ROTSE-III Early Observations
  30. XRF030723, BVRcIc field photometry
  31. XRF 030723, optical observations
  32. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  33. Konus-Wind detection of the bursts from SGR1806-20 region
  34. SGR 1806-20, submm observations
  35. RXTE PCA Observations of SGR1806-20 Region
  36. IPN triangulation of GRB030714 (two large error boxes)
  37. IPN triangulation of GRB030715 (two large error boxes)
  38. GRB030706 triangulation (single large error box)
  39. GRB030329, optical observation in May
  40. IPN triangulation of GRB030626 (single large error box)
  41. IPN triangulation of GRB030626 (two large error boxes)
  42. GRB030329: second XMM-Newton observation
  43. GRB030329 -- RATAN-600 data in April-May
  44. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch
  45. IPN triangulation of GRB030606 (two alternate error boxes)
  46. GRB 030528: Infrared Observations and the Proposed IR Counterpart
  47. GRB 030528: tentative NIR counterpart
  48. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  49. GRB030528, BVRI field photometry
  50. GRB030329, SPM optical observations
  51. GRB030528: Chandra TOO Planned
  52. GRB030528(=H2724): Revised SXC Localization
  53. GRB 030528 Bisei optical observation
  54. GRB030528 (H2724): A long GRB localized by HETE
  55. GRB 030329: Correction to GCN 2254
  56. GRB 030329: Optical Observations
  57. GRB 030528 (=H2724) Kyoto optical observation
  58. GRB 030416: Optical Observations
  59. GRB 030329 Optical Observations
  60. GRB030329: XMM-Newton observation
  61. GRB 021004: HST observations
  62. GRB030324: Further Observations of the Candidate Optical Afterglow
  63. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  64. IPN triangulation of GRB030519B=H2716 (small error box)
  65. HETE GRB030329, correction to Rc Observations in Loiano
  66. GRB 030329: Optical limit (contemporaneous imaging)
  67. IPN triangulation of GRB030509 (small errror box)
  68. GRB030329, BVRI photometry
  69. GRB030429, refiend optical brightness
  70. GRB 030329: Optical limit (contemporaneous photography)
  71. GRB030418, BVRcIc field photometry
  72. GRB030429, BVRcIc field photometry
  73. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  74. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  75. GRB030329: RTT150 optical observations and upper limit for a host
  76. GRB030501, optical observation
  77. GRB030501 triangulation (correction to GCN 2194)
  78. GRB030329: RTT150 optical observations and upper limit for a host
  79. GRB 030429: redshift from VLT spectroscopy
  80. GRB030501B triangulation (single error box)
  81. GRB 030329, BVRI photometry
  82. GRB030429: Optical Observations
  83. GRB030501: TAROT candidate afterglow present in archival images
  84. GRB 030429: confirmation of afterglow candidate
  85. GRB 030329 Oprical observations in Rozhen observatory
  86. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  87. IPN triangulation of GRB030425 (single error box)
  88. GRB 030329, the review of the sky area in plate archive (1950-1998)
  89. GRB 030329: optical spectropolarimetry at VLT
  90. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  91. GRB030329: optical polarization
  92. IPN triangulation of GRB030422 (two large error boxes)
  93. GRB030329, optical observation
  94. MASTER:optical observations GRB030418
  95. MASTER:optical observations probable GRB030414
  96. GRB030418: Kiso near infrared observations
  97. GRB 030418: Optical afterglow
  98. OT GRB 030329: early UBVRcIc spectral evolution
  99. OT GRB 030329: early spectrum
  100. IPN triangulation of GRB030414 (small error box)

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