ASTROSAT CZTI

Data Quality Report

Orbit 55810

Creation date: 2026-01-21T12:09:13.896628
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_55810cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55810cztM0_level2_quad_clean.evt
Size (bytes)419,662,08097,021,440
Size400.2 MB 92.5 MB
Events in quadrant A3,913,746618,616
Events in quadrant B3,018,114678,801
Events in quadrant C3,692,582609,487
Events in quadrant D4,386,016561,549

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162302
B0142662
C0163082
D0179492

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67381922.849510%
B67381041.543485%
C67381692.508163%
D67382834.200059%

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 7843 6739 112 112 1.43% 1.66%
B 7843 6739 6 6 0.08% 0.09%
C 7843 6739 130 130 1.66% 1.93%
D 7843 6739 226 226 2.88% 3.35%

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 0 8 375249 2184.37 691 675 171.5
A 12 115 234360 1362.76 691 675 171.5
A 8 192 226736 1318.3 691 675 171.5
B 0 213 111819 743.65 693 669 149.5
B 7 252 66527 440.62 693 669 149.5
B 10 247 29031 189.76 693 669 149.5
C 13 3 828944 4391.12 683 676 188.6
C 10 22 81010 425.9 683 676 188.6
C 15 200 44453 232.09 683 676 188.6
D 11 129 1375903 7290.65 670 641 188.6
D 7 96 111662 588.55 670 641 188.6
D 3 12 67593 354.93 670 641 188.6

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