ASTROSAT CZTI

Data Quality Report

Orbit 56872

Creation date: 2026-04-02T21:40:44.074217
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_083T03_9000006562_56872cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56872cztM0_level2_quad_clean.evt
Size (bytes)557,706,24092,332,800
Size531.9 MB 88.1 MB
Events in quadrant A2,903,817645,692
Events in quadrant B8,621,915524,382
Events in quadrant C4,581,745583,880
Events in quadrant D4,016,411574,225

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137842
B0301632
C0185032
D0167222

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6700701.044776%
B6700193828.925373%
C67004556.791045%
D67011772.641397%

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 7595 6700 2 2 0.03% 0.03%
B 7594 6700 1662 1662 21.89% 24.81%
C 7595 6701 423 423 5.57% 6.31%
D 7596 6702 141 141 1.86% 2.10%

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 7 64 26384 143.58 724 706 178.8
A 3 62 23624 128.14 724 706 178.8
A 4 13 16544 88.56 724 706 178.8
B 5 185 4538638 35068.87 602 580 129.4
B 10 16 1045296 8073.28 602 580 129.4
B 0 197 459059 3543.0 602 580 129.4
C 13 3 968526 5166.17 681 672 187.3
C 12 2 471205 2511.59 681 672 187.3
C 1 16 201478 1071.85 681 672 187.3
D 8 240 398974 2043.19 692 660 194.9
D 2 31 305219 1562.27 692 660 194.9
D 2 249 169060 863.82 692 660 194.9

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