ASTROSAT CZTI

Data Quality Report

Orbit 20180221_G08_055T01_9000001912_level2

Creation date: 2025-11-19T17:00:02.809658
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/AS1G08_055T01_9000001912cztM0_level2.fits modeM0/AS1G08_055T01_9000001912cztM0_level2_quad_clean.evt
Size (bytes)1,083,320,6401,015,894,080
Size1.0 GB 968.8 MB
Events in quadrant A6,650,8906,168,760
Events in quadrant B5,914,2445,457,590
Events in quadrant C6,672,7805,927,463
Events in quadrant D5,733,1605,382,738

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01790
B01790
C01790
D01790

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023280
B023280
C023280
D023280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02449840
B03414740
C02352550
D02829590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11424615631.368100%
B1142461526913.365019%
C11424610290.900688%
D11424635363.095076%

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 132227 114245 0 0 0.00% 0.00%
B 132227 111792 0 0 0.00% 0.00%
C 132227 114245 0 0 0.00% 0.00%
D 132227 114221 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 6472 11.39 1732 1625 425.4
A 7 110 5493 9.09 1732 1625 425.4
A 9 19 5046 8.04 1732 1625 425.4
B 2 9 5193 12.34 1560 1493 299.9
B 3 17 4021 8.43 1560 1493 299.9
B 14 254 3904 8.04 1560 1493 299.9
C 1 80 5077 7.62 1761 1647 450.3
C 1 81 4988 7.42 1761 1647 450.3
C 12 241 4617 6.6 1761 1647 450.3
D 6 231 4241 6.35 1633 1489 433.1
D 3 14 4032 5.87 1633 1489 433.1
D 7 5 3990 5.77 1633 1489 433.1

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