ASTROSAT CZTI

Data Quality Report

Orbit 57439

Creation date: 2026-05-10T23:49:08.129232
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_57439cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57439cztM0_level2_quad_clean.evt
Size (bytes)533,027,52090,138,240
Size508.3 MB 86.0 MB
Events in quadrant A4,965,233611,220
Events in quadrant B2,888,797649,865
Events in quadrant C6,079,825509,352
Events in quadrant D5,305,457516,737

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191561
B0133852
C0225611
D0201821

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6338971.530451%
B63371101.735837%
C633892314.562954%
D63385618.851373%

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 7233 6339 2 2 0.03% 0.03%
B 7232 6338 15 15 0.21% 0.24%
C 7233 6339 801 801 11.07% 12.64%
D 7233 6339 534 534 7.38% 8.42%

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 12 2218312 13175.86 681 665 168.3
A 3 14 56832 333.71 681 665 168.3
A 10 251 36596 213.48 681 665 168.3
B 10 247 46066 319.76 671 646 142.0
B 5 185 39231 271.64 671 646 142.0
B 4 201 31910 220.1 671 646 142.0
C 15 224 2924850 17668.0 607 603 165.5
C 12 2 389227 2348.03 607 603 165.5
C 14 245 130165 782.8 607 603 165.5
D 2 249 1211051 6810.53 633 602 177.7
D 15 142 639742 3596.09 633 602 177.7
D 8 240 377168 2118.73 633 602 177.7

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