ASTROSAT CZTI

Data Quality Report

Orbit 20181225_T03_066T01_9000002600_level2

Creation date: 2025-11-26T18:17:37.773835
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_066T01_9000002600cztM0_level2.fits modeM0/AS1T03_066T01_9000002600cztM0_level2_quad_clean.evt
Size (bytes)1,100,730,240905,071,680
Size1.0 GB 863.1 MB
Events in quadrant A6,663,1105,109,891
Events in quadrant B6,481,5344,998,055
Events in quadrant C6,618,7244,900,765
Events in quadrant D5,711,9784,545,027

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01990
B01990
C01990
D01990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023320
B023320
C023320
D023320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02957460
B02596180
C02563180
D02709540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11462768986.017779%
B11462738173.329931%
C11462729392.563968%
D11462743433.788811%

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 134393 114491 0 0 0.00% 0.00%
B 134393 114296 0 0 0.00% 0.00%
C 134393 114620 0 0 0.00% 0.00%
D 134393 113741 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 5642 9.4 1734 1626 427.2
A 7 110 5391 8.81 1734 1626 427.2
A 9 19 5003 7.91 1734 1626 427.2
B 2 9 5361 11.08 1712 1632 336.5
B 2 8 4479 8.46 1712 1632 336.5
B 5 128 4273 7.85 1712 1632 336.5
C 12 241 4600 6.69 1749 1632 443.7
C 3 126 4470 6.4 1749 1632 443.7
C 2 191 4444 6.34 1749 1632 443.7
D 6 231 4111 6.02 1634 1487 436.1
D 3 14 4074 5.93 1634 1487 436.1
D 7 3 4044 5.86 1634 1487 436.1

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