ASTROSAT CZTI

Data Quality Report

Orbit 56551

Creation date: 2026-03-12T05:40:57.829005
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_060T01_9000006556_56551cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56551cztM0_level2_quad_clean.evt
Size (bytes)446,345,28092,321,280
Size425.7 MB 88.0 MB
Events in quadrant A3,428,506622,972
Events in quadrant B5,697,345586,980
Events in quadrant C3,086,584605,101
Events in quadrant D3,819,918541,368

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145942
B0211432
C0137022
D0157092

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62971131.794505%
B6297104516.595204%
C6296560.889454%
D62962824.479034%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7492 6298 77 77 1.03% 1.22%
B 7492 6298 640 640 8.54% 10.16%
C 7491 6297 40 40 0.53% 0.64%
D 7491 6297 186 186 2.48% 2.95%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 4 95 258073 1477.98 701 683 174.1
A 8 249 105872 604.02 701 683 174.1
A 11 31 86613 493.43 701 683 174.1
B 5 172 1998322 14517.49 648 626 137.6
B 4 206 732388 5317.8 648 626 137.6
B 4 171 79806 575.41 648 626 137.6
C 9 38 117515 620.76 686 679 188.2
C 12 249 94882 500.51 686 679 188.2
C 12 252 74968 394.7 686 679 188.2
D 2 249 544319 2852.18 662 631 190.6
D 2 207 142478 744.13 662 631 190.6
D 11 129 106840 557.17 662 631 190.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter