ASTROSAT CZTI

Data Quality Report

Orbit 20180717_A04_218T08_9000002236_level2

Creation date: 2025-11-23T14:25:47.968825
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/AS1A04_218T08_9000002236cztM0_level2.fits modeM0/AS1A04_218T08_9000002236cztM0_level2_quad_clean.evt
Size (bytes)910,353,600864,864,000
Size868.2 MB 824.8 MB
Events in quadrant A5,497,6725,093,070
Events in quadrant B5,358,3485,106,550
Events in quadrant C5,497,3504,954,609
Events in quadrant D4,746,5244,567,510

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019240
B019240
C019240
D019240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02162080
B02030910
C02103480
D02037650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9439911261.192809%
B9439915081.597475%
C943998450.895137%
D9439911071.172682%

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 112184 94394 0 0 0.00% 0.00%
B 112184 94386 0 0 0.00% 0.00%
C 112184 94390 0 0 0.00% 0.00%
D 112184 94388 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 5308 11.22 1431 1345 353.3
A 7 110 4364 8.55 1431 1345 353.3
A 9 19 4107 7.82 1431 1345 353.3
B 2 9 4601 11.91 1416 1356 272.3
B 5 128 3521 7.95 1416 1356 272.3
B 2 8 3443 7.66 1416 1356 272.3
C 12 241 3874 6.72 1453 1359 374.5
C 3 126 3737 6.35 1453 1359 374.5
C 9 242 3682 6.2 1453 1359 374.5
D 6 231 3575 6.47 1354 1228 362.5
D 3 14 3511 6.3 1354 1228 362.5
D 6 67 3349 5.85 1354 1228 362.5

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