ASTROSAT CZTI

Data Quality Report

Orbit 55823

Creation date: 2026-01-22T07:05:42.428473
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_55823cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55823cztM0_level2_quad_clean.evt
Size (bytes)526,072,32094,150,080
Size501.7 MB 89.8 MB
Events in quadrant A5,778,244571,379
Events in quadrant B3,084,178692,861
Events in quadrant C4,196,038604,925
Events in quadrant D5,894,280514,562

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218312
B0143972
C0175712
D0223202

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A670083312.432836%
B6700891.328358%
C67003144.686567%
D670093313.925373%

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 7870 6701 828 828 10.52% 12.36%
B 7870 6701 44 44 0.56% 0.66%
C 7870 6701 259 259 3.29% 3.87%
D 7870 6701 842 842 10.70% 12.57%

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 12 115 2298144 13998.06 664 648 164.1
A 15 32 460607 2802.41 664 648 164.1
A 8 192 199693 1212.73 664 648 164.1
B 5 185 180651 1208.61 687 662 148.9
B 0 213 43208 285.69 687 662 148.9
B 10 247 38760 255.82 687 662 148.9
C 13 3 1061868 5728.4 672 666 185.3
C 6 223 393011 2117.89 672 666 185.3
C 1 16 38515 204.31 672 666 185.3
D 11 129 2172821 12048.75 629 601 180.3
D 8 160 815833 4521.88 629 601 180.3
D 7 96 160513 886.99 629 601 180.3

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