ASTROSAT CZTI

Data Quality Report

Orbit 20180827_T02_088T01_9000002332_level2

Creation date: 2025-11-24T06:53:03.855131
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/AS1T02_088T01_9000002332cztM0_level2.fits modeM0/AS1T02_088T01_9000002332cztM0_level2_quad_clean.evt
Size (bytes)789,528,960703,615,680
Size753.0 MB 671.0 MB
Events in quadrant A4,801,0844,076,250
Events in quadrant B4,638,0584,101,428
Events in quadrant C4,736,6303,924,742
Events in quadrant D4,122,6143,593,769

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016700
B016700
C016700
D016700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720680
B01749760
C01705490
D01721410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8185412631.542991%
B8185412971.584529%
C8185414371.755565%
D8185410061.229018%

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 95079 81847 0 0 0.00% 0.00%
B 95079 81852 0 0 0.00% 0.00%
C 95079 81852 0 0 0.00% 0.00%
D 95079 81843 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 4693 11.37 1250 1167 310.1
A 7 110 3745 8.31 1250 1167 310.1
A 0 30 3560 7.72 1250 1167 310.1
B 2 9 3839 11.0 1229 1172 242.4
B 2 8 3268 8.65 1229 1172 242.4
B 3 17 3110 7.99 1229 1172 242.4
C 12 241 3358 6.67 1253 1162 329.1
C 9 233 3215 6.24 1253 1162 329.1
C 3 158 3210 6.22 1253 1162 329.1
D 3 14 3134 6.6 1175 1065 313.3
D 6 231 3020 6.24 1175 1065 313.3
D 7 3 2862 5.74 1175 1065 313.3

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