ASTROSAT CZTI

Data Quality Report

Orbit 55841

Creation date: 2026-01-23T13:10:23.432529
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_127T10_9000006542_55841cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55841cztM0_level2_quad_clean.evt
Size (bytes)448,084,80098,375,040
Size427.3 MB 93.8 MB
Events in quadrant A3,726,240641,999
Events in quadrant B3,239,816684,742
Events in quadrant C3,204,123627,711
Events in quadrant D5,884,644547,699

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156402
B0145882
C0148182
D0223362

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68381962.866335%
B68381972.880959%
C6838991.447792%
D68376789.916630%

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 7543 6838 41 41 0.54% 0.60%
B 7543 6838 10 10 0.13% 0.15%
C 7543 6838 22 22 0.29% 0.32%
D 7542 6837 550 550 7.29% 8.04%

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 8 192 295263 1598.76 742 723 184.2
A 3 14 257621 1394.44 742 723 184.2
A 0 8 105929 571.06 742 723 184.2
B 0 197 173303 1074.68 734 707 160.6
B 0 213 52143 320.27 734 707 160.6
B 7 252 46639 286.0 734 707 160.6
C 4 192 94843 473.58 726 722 198.7
C 12 252 73061 363.98 726 722 198.7
C 6 223 43485 215.17 726 722 198.7
D 11 129 2393546 12153.87 687 657 196.9
D 3 12 502413 2548.5 687 657 196.9
D 8 245 74560 375.37 687 657 196.9

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