ASTROSAT CZTI

Data Quality Report

Orbit 20200111_T03_175T01_9000003428_level2

Creation date: 2025-12-08T05:19:17.824978
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/AS1T03_175T01_9000003428cztM0_level2.fits modeM0/AS1T03_175T01_9000003428cztM0_level2_quad_clean.evt
Size (bytes)892,517,760761,546,880
Size851.2 MB 726.3 MB
Events in quadrant A5,602,1164,459,637
Events in quadrant B5,384,0504,497,508
Events in quadrant C5,497,3104,330,239
Events in quadrant D4,515,8103,748,945

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017880
B017880
C017880
D017880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01650
B01650
C01650
D01650

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01859680
B01876660
C02005440
D02817370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8791510401.182961%
B8791513441.528749%
C8791528573.249730%
D879151176113.377694%

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 104250 87909 0 0 0.00% 0.00%
B 104250 87908 0 0 0.00% 0.00%
C 104250 87906 0 0 0.00% 0.00%
D 104250 87721 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 5249 10.81 1460 1370 358.9
A 7 110 4363 8.34 1460 1370 358.9
A 0 30 4106 7.62 1460 1370 358.9
B 2 9 4285 10.76 1421 1360 271.9
B 2 8 3579 8.16 1421 1360 271.9
B 3 80 3509 7.9 1421 1360 271.9
C 3 126 3798 6.68 1455 1368 363.6
C 12 241 3635 6.24 1455 1368 363.6
C 12 250 3627 6.21 1455 1368 363.6
D 15 46 3306 6.21 1292 1180 342.6
D 3 14 3261 6.07 1292 1180 342.6
D 7 3 3162 5.79 1292 1180 342.6

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