ASTROSAT CZTI

Data Quality Report

Orbit 20220911_A11_075T01_9000005342_level2

Creation date: 2026-01-05T12:31:58.085437
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/AS1A11_075T01_9000005342cztM0_level2.fits modeM0/AS1A11_075T01_9000005342cztM0_level2_quad_clean.evt
Size (bytes)4,191,422,4004,503,663,360
Size3.9 GB 4.2 GB
Events in quadrant A24,480,36026,121,539
Events in quadrant B24,558,25628,000,097
Events in quadrant C25,666,28227,559,842
Events in quadrant D21,552,13824,065,672

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A091600
B091600
C091600
D091600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013492460
B010091880
C09455250
D012733780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017030
B017030
C017030
D017030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A447668360658.056193%
B44766878941.763360%
C44766820500.457929%
D447668244915.470795%

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 616975 446944 0 0 0.00% 0.00%
B 616975 447302 0 0 0.00% 0.00%
C 616976 447475 0 0 0.00% 0.00%
D 616975 447389 0 0 0.00% 0.00%

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 7 110 20193 9.1 6403 6016 1557.8
A 9 19 20085 9.03 6403 6016 1557.8
A 0 29 19542 8.68 6403 6016 1557.8
B 2 9 21224 12.09 6520 6245 1239.1
B 3 80 18943 10.25 6520 6245 1239.1
B 5 128 17257 8.89 6520 6245 1239.1
C 1 81 21260 8.68 6788 6402 1711.2
C 1 80 20530 8.26 6788 6402 1711.2
C 3 202 20246 8.09 6788 6402 1711.2
D 10 189 15996 6.34 6182 5649 1632.7
D 7 3 15904 6.28 6182 5649 1632.7
D 10 113 15531 6.05 6182 5649 1632.7

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