ASTROSAT CZTI

Data Quality Report

Orbit 20201201_A10_021T08_9000004042_level2

Creation date: 2025-12-17T23:44:06.263097
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/AS1A10_021T08_9000004042cztM0_level2.fits modeM0/AS1A10_021T08_9000004042cztM0_level2_quad_clean.evt
Size (bytes)206,622,720180,216,000
Size197.1 MB 171.9 MB
Events in quadrant A1,317,5041,110,273
Events in quadrant B1,250,6111,105,994
Events in quadrant C1,264,9241,037,074
Events in quadrant D947,668729,541

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0453340
B0465890
C0478490
D0880540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0260
C0260
D0270

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04360
B04420
C04420
D04380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A214194672.180307%
B214396262.919912%
C214077923.699724%
D21349530424.844255%

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 45813 20168 0 0 0.00% 0.00%
B 45813 20189 0 0 0.00% 0.00%
C 45813 20156 0 0 0.00% 0.00%
D 45811 20037 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 1084 8.91 343 322 85.5
A 7 110 1033 8.31 343 322 85.5
A 0 30 977 7.66 343 322 85.5
B 2 9 1038 11.03 331 316 65.5
B 5 128 882 8.65 331 316 65.5
B 2 8 832 7.88 331 316 65.5
C 12 241 887 6.74 334 312 85.3
C 12 250 842 6.22 334 312 85.3
C 9 209 841 6.2 334 312 85.3
D 6 231 686 6.01 270 247 73.1
D 10 189 669 5.77 270 247 73.1
D 6 38 668 5.76 270 247 73.1

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