ASTROSAT CZTI

Data Quality Report

Orbit 56931

Creation date: 2026-04-06T19:41:14.824275
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/AS1A14_083T14_9000006564_56931cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56931cztM0_level2_quad_clean.evt
Size (bytes)850,294,08075,718,080
Size810.9 MB 72.2 MB
Events in quadrant A6,179,030547,530
Events in quadrant B5,702,293603,359
Events in quadrant C4,703,372525,355
Events in quadrant D14,384,301160,614

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0229311
B0215081
C0191631
D0471607

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A653387313.362927%
B653374611.418950%
C653386313.209858%
D6533502576.917190%

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 7123 6533 700 700 9.83% 10.71%
B 7123 6534 510 510 7.16% 7.81%
C 7123 6534 800 800 11.23% 12.24%
D 7122 6532 4815 4815 67.61% 73.71%

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 64 3523299 21761.18 647 630 161.9
A 3 245 61995 379.08 647 630 161.9
A 3 14 35995 218.47 647 630 161.9
B 5 172 1471153 10575.15 649 627 139.1
B 5 185 1261620 9068.32 649 627 139.1
B 10 16 214001 1534.46 649 627 139.1
C 13 3 2065300 11842.02 631 623 174.4
C 1 12 61930 351.63 631 623 174.4
C 14 254 50685 287.13 631 623 174.4
D 12 33 9853312 78254.76 443 422 125.9
D 2 249 1404998 11155.59 443 422 125.9
D 15 142 918296 7290.04 443 422 125.9

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