ASTROSAT CZTI

Data Quality Report

Orbit 56356

Creation date: 2026-02-27T05:39:29.102333
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_083T05_9000006554_56356cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56356cztM0_level2_quad_clean.evt
Size (bytes)3,360,375,360252,472,320
Size3.1 GB 240.8 MB
Events in quadrant A22,023,8781,918,397
Events in quadrant B17,642,3842,212,171
Events in quadrant C24,817,9241,806,761
Events in quadrant D58,053,71250,974

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04920
B04920
C04920
D04920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0824303
B0692203
C0905143
D01888993

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24018352014.655675%
B2401923039.588243%
C24019423017.611058%
D240192348797.785087%

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 25992 24167 3085 3085 11.87% 12.77%
B 25993 24297 1537 1537 5.91% 6.33%
C 25993 24295 3861 3861 14.85% 15.89%
D 25992 24078 20618 20618 79.32% 85.63%

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 3 4706722 7961.7 2380 2325 590.9
A 3 62 2333333 3944.99 2380 2325 590.9
A 0 8 1419880 2399.06 2380 2325 590.9
B 4 206 5071432 9886.79 2417 2327 512.7
B 5 185 785852 1528.19 2417 2327 512.7
B 4 171 513144 996.3 2417 2327 512.7
C 15 230 8687044 14069.39 2252 2231 617.3
C 12 254 3146910 5094.38 2252 2231 617.3
C 13 3 1711120 2768.4 2252 2231 617.3
D 8 129 51253378 364783.79 472 448 140.5
D 12 33 2096143 14915.74 472 448 140.5
D 8 113 662756 4713.86 472 448 140.5

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