ASTROSAT CZTI

Data Quality Report

Orbit 57421

Creation date: 2026-05-09T18:18:51.003043
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_102T01_9000006572_57421cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57421cztM0_level2_quad_clean.evt
Size (bytes)393,068,16087,194,880
Size374.9 MB 83.2 MB
Events in quadrant A2,812,912578,216
Events in quadrant B2,793,602621,498
Events in quadrant C4,650,863531,945
Events in quadrant D3,833,358496,212

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123951
B0125551
C0179751
D0155661

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59001051.779661%
B5901851.440434%
C59014116.964921%
D59014116.964921%

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 6985 5900 34 34 0.49% 0.58%
B 6986 5901 12 12 0.17% 0.20%
C 6985 5900 343 343 4.91% 5.81%
D 6986 5901 323 323 4.62% 5.47%

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 162615 1026.62 646 631 157.8
A 10 251 98221 618.51 646 631 157.8
A 0 12 26102 161.43 646 631 157.8
B 5 185 69393 508.73 630 607 135.2
B 0 153 67948 498.04 630 607 135.2
B 0 63 38492 280.19 630 607 135.2
C 15 224 1688750 10306.13 602 597 163.8
C 6 223 368052 2243.3 602 597 163.8
C 14 254 173553 1055.89 602 597 163.8
D 7 96 658273 3790.6 605 579 173.5
D 15 142 226270 1300.76 605 579 173.5
D 3 12 159655 916.83 605 579 173.5

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