ASTROSAT CZTI

Data Quality Report

Orbit 20220108_A11_037T01_9000004858_level2

Creation date: 2025-12-31T08:44:25.192218
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_037T01_9000004858cztM0_level2.fits modeM0/AS1A11_037T01_9000004858cztM0_level2_quad_clean.evt
Size (bytes)304,833,600224,403,840
Size290.7 MB 214.0 MB
Events in quadrant A1,451,5821,140,137
Events in quadrant B1,963,5061,321,116
Events in quadrant C2,052,2081,269,393
Events in quadrant D1,454,886764,232

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01174680
B0855530
C0781590
D01738660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06860
B06860
C06820
D06860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01100
C01100
D01130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A334261114733.348292%
B3346611363.394490%
C334574361.303165%
D334561154634.511000%

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 45827 29894 0 0 0.00% 0.00%
B 45827 33440 0 0 0.00% 0.00%
C 45827 33479 0 0 0.00% 0.00%
D 45827 33293 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 1173 8.59 378 356 95.1
A 0 29 1169 8.55 378 356 95.1
A 9 19 1157 8.42 378 356 95.1
B 2 9 1701 11.71 521 500 102.6
B 3 80 1539 10.13 521 500 102.6
B 2 8 1374 8.52 521 500 102.6
C 3 202 1622 8.03 543 515 137.9
C 3 203 1600 7.87 543 515 137.9
C 3 187 1389 6.34 543 515 137.9
D 7 3 1051 6.02 417 382 111.2
D 4 160 1041 5.93 417 382 111.2
D 10 189 1040 5.92 417 382 111.2

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