ASTROSAT CZTI

Data Quality Report

Orbit 20180923_T02_109T01_9000002386_level2

Creation date: 2025-11-24T20:24:07.195751
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_109T01_9000002386cztM0_level2.fits modeM0/AS1T02_109T01_9000002386cztM0_level2_quad_clean.evt
Size (bytes)3,045,314,8802,648,759,040
Size2.8 GB 2.5 GB
Events in quadrant A18,723,31015,259,036
Events in quadrant B18,004,03815,612,305
Events in quadrant C18,326,83414,775,719
Events in quadrant D15,829,03813,237,115

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07217820
B06771460
C06886270
D08289900

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A063510
B063770
C056070
D063720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05190
B05150
C05200
D05200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A31222194603.029905%
B31220546621.493250%
C31218664312.059990%
D311672164155.266755%

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 396706 313744 0 0 0.00% 0.00%
B 396706 313728 0 0 0.00% 0.00%
C 396705 313783 0 0 0.00% 0.00%
D 396706 312686 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 17648 11.13 4871 4573 1174.7
A 7 110 14963 8.84 4871 4573 1174.7
A 0 30 14071 8.09 4871 4573 1174.7
B 2 9 14755 11.02 4771 4554 926.0
B 2 8 12256 8.32 4771 4554 926.0
B 5 128 11757 7.78 4771 4554 926.0
C 1 80 13810 7.57 4840 4507 1229.6
C 1 81 13466 7.29 4840 4507 1229.6
C 12 241 12729 6.69 4840 4507 1229.6
D 3 14 11653 6.33 4520 4116 1189.9
D 6 231 11415 6.13 4520 4116 1189.9
D 6 67 11138 5.9 4520 4116 1189.9

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