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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"

39263 results found.

  1. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  2. GRB030329, further radio observations at GMRT
  3. GRB030528, BVRI field photometry
  4. IPN triangulation of GRB030601 (annulus)
  5. GRB030528: Chandra TOO Planned
  6. GRB 030519B: optical observations.
  7. GRB 030329: optical observations
  8. GRB 030329/SN 2003dh: Jitter Episode
  9. GRB 030528, Teramo optical observation
  10. GRB 030528 Bisei optical observation
  11. GRB030528 (H2724): A long GRB localized by HETE
  12. GRB 030329: Correction to GCN 2254
  13. GRB 030329: Optical Observations
  14. GRB 030528: Optical observations at RIKEN
  15. GRB 030528 (=H2724) Kyoto optical observation
  16. IPN triangulation of GRB030523B (annulus)
  17. GRB 030416: Optical Observations
  18. GRB 030329: Planned XMM-Newton Observation
  19. IPN triangulation of GRB030523 (annulus)
  20. GRB 030329: optical photometry at various french observatories
  21. GRB 030329: optical photometry at Belesta observatory (France)
  22. GRB 030329/SN 2003dh: Possible increase in brightness
  23. GRB 030329: HST ACS Observations of the Host
  24. GRB 030329 Optical Observations
  25. GRB 021004: HST observations
  26. GRB030324: Further Observations of the Candidate Optical Afterglow
  27. IPN triangulation of GRB030519B=H2716 (small error box)
  28. GRB 030418: Second Epoch Optical Observations with Magellan
  29. GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM
  30. IPN triangulation of GRB030519 (annulus)
  31. IPN triangulation of GRB030518C (annulus)
  32. IPN triangulation of GRB030518B (annulus)
  33. IPN triangulation of GRB030518A (annulus)
  34. IPN triangulation of GRB030514 (annulus)
  35. IPN triangulation of GRB030513 (annulus)
  36. IPN triangulation of GRB030509B (annulus)
  37. GRB 030329: Optical limit (contemporaneous imaging)
  38. GRB 030501: final TAROT limits
  39. IPN triangulation of GRB030509 (small errror box)
  40. IPN triangulation of GRB030509 - correction
  41. IPN triangulation of GRB030509 (single error box)
  42. GRB030329: RTT150 optical observations
  43. GRB 030329: Optical limit (contemporaneous photography)
  44. GRB030418, BVRcIc field photometry
  45. GRB 030429: Redshift of neighbor galaxy
  46. GRB030429, BVRcIc field photometry
  47. GRB 030329: High-Resolution Spectroscopy of the Host
  48. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  49. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  50. GRB030429: RTT150 optical observations, a possible host galaxy
  51. IPN triangulation of GRB030506 (annulus)
  52. IPN triangulation of GRB030505B (large error box)
  53. IPN triangulation of GRB030505A (annulus)
  54. GRB030329: RTT150 optical observations and upper limit for a host
  55. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  56. GRB030501, optical observation
  57. GRB030501C triangulation (annulus)
  58. GRB030329: RTT150 optical observations and upper limit for a host
  59. GRB 030429: Radio Observations
  60. GRB 030429: redshift from VLT spectroscopy
  61. GRB 030429: IR photometry with IRSF/SIRIUS
  62. GRB030501B triangulation (single error box)
  63. GRB 030329 Optical Observations
  64. GRB 030329, BVRI photometry
  65. GRB 030501: TAROT possible candidate counterpart
  66. IPN triangulation of GRB030501 (IBIS event; annulus)
  67. IPN triangulation of GRB030501B (annulus)
  68. GRB 030429: confirmation of afterglow candidate
  69. GRB030429, possible optical counterpart
  70. GRB030501 localized by INTEGRAL
  71. GRB030425: CrAO optical observation
  72. IPN triangulation of GRB030429 (annulus)
  73. IPN triangulation of GRB030428 (two large error boxes)
  74. GRB 030329 Oprical observations in Rozhen observatory
  75. GRB 030429: ROTSE-III observations
  76. GRB 030324: Radio Observations
  77. GRB030329 observed as a sudden ionospheric disturbance (SID)
  78. IPN triangulation of GRB030426 (annulus)
  79. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  80. IPN triangulation of GRB030425 (single error box)
  81. GRB 030329, the review of the sky area in plate archive (1950-1998)
  82. GRB 030329: Spectral Evolution of SN 2003dh
  83. Optical Observations of GRB 030418 with Magellan
  84. GRB 030329: optical spectropolarimetry at VLT
  85. IPN triangulation of GRB030422C (annulus)
  86. IPN triangulation of GRB030422B (annulus)
  87. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  88. GRB030329: optical polarization
  89. IPN triangulation of GRB030422 (two large error boxes)
  90. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  91. IPN triangulation of GRB030421 (annulus)
  92. MASTER:optical observations GRB030418
  93. MASTER:optical observations probable GRB030414
  94. GRB030329: 444 AAVSO Measurements
  95. IPN triangulation of GRB030419 (annulus)
  96. MASTER:optical observations GRB030416
  97. ROTSE-III prompt optical detections of GRB 030418
  98. GRB030418: Upper limits from recent and historical observations.
  99. GRB030418: Kiso near infrared observations
  100. GRB 030418: Optical afterglow

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