ASTROSAT CZTI

Data Quality Report

Orbit 54257

Creation date: 2025-10-09T17:32:57.985173
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/AS1C09_004T08_9000006514_54257cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54257cztM0_level2_quad_clean.evt
Size (bytes)776,819,52085,296,960
Size740.8 MB 81.3 MB
Events in quadrant A4,697,484624,678
Events in quadrant B5,072,677688,209
Events in quadrant C5,316,387561,917
Events in quadrant D13,145,247236,627

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187051
B0198321
C0206282
D0436911

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67574606.807755%
B67582523.728914%
C67576119.042474%
D6757413361.166198%

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 7487 6758 325 325 4.34% 4.81%
B 7488 6759 111 111 1.48% 1.64%
C 7487 6758 496 496 6.62% 7.34%
D 7487 6757 3909 3909 52.21% 57.85%

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 7 29 698470 4031.09 701 684 173.1
A 13 248 537945 3103.74 701 684 173.1
A 12 17 373120 2151.55 701 684 173.1
B 7 0 1290904 8576.23 702 679 150.4
B 8 234 351439 2331.53 702 679 150.4
B 5 236 234683 1555.44 702 679 150.4
C 1 29 1450232 7982.13 665 657 181.6
C 15 198 544653 2995.53 665 657 181.6
C 13 3 254507 1397.83 665 657 181.6
D 8 176 10833419 87908.02 429 410 123.2
D 12 2 181569 1470.07 429 410 123.2
D 3 144 88433 714.29 429 410 123.2

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