ASTROSAT CZTI

Data Quality Report

Orbit 20200531_A09_006T01_9000003700_level2

Creation date: 2025-12-11T07:50:09.075377
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/AS1A09_006T01_9000003700cztM0_level2.fits modeM0/AS1A09_006T01_9000003700cztM0_level2_quad_clean.evt
Size (bytes)353,050,560340,076,160
Size336.7 MB 324.3 MB
Events in quadrant A2,205,1622,112,592
Events in quadrant B2,065,1242,037,927
Events in quadrant C2,104,1381,954,352
Events in quadrant D1,807,2201,683,875

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07380
B07380
C07380
D07380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0748230
B0856890
C0793810
D01175700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A365561710.467775%
B3655613263.627312%
C365566341.734325%
D3655623466.417551%

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 40816 36556 0 0 0.00% 0.00%
B 40816 36546 0 0 0.00% 0.00%
C 40816 36545 0 0 0.00% 0.00%
D 40816 36543 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 0 29 2121 11.03 573 538 143.5
A 7 110 1795 8.76 573 538 143.5
A 9 19 1654 7.78 573 538 143.5
B 2 9 1661 10.63 544 519 107.4
B 2 8 1383 8.04 544 519 107.4
B 5 232 1319 7.45 544 519 107.4
C 1 81 1627 7.67 555 518 144.6
C 1 80 1597 7.46 555 518 144.6
C 3 126 1463 6.53 555 518 144.6
D 3 14 1321 6.15 515 468 138.6
D 6 231 1258 5.7 515 468 138.6
D 1 31 1250 5.64 515 468 138.6

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