ASTROSAT CZTI

Data Quality Report

Orbit 51631

Creation date: 2025-04-15T13:52:55.460473
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/AS1A13_037T05_9000006460_51631cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51631cztM0_level2_quad_clean.evt
Size (bytes)724,705,920112,164,480
Size691.1 MB 107.0 MB
Events in quadrant A7,713,941683,725
Events in quadrant B5,406,502801,419
Events in quadrant C7,148,437684,057
Events in quadrant D5,928,880662,413

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0285350
B0215870
C0269610
D0233242

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8121115414.210073%
B81213904.802364%
C81226738.286136%
D81214185.147149%

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 8121 8121 732 732 9.01% 9.01%
B 8121 8121 216 216 2.66% 2.66%
C 8122 8122 545 545 6.71% 6.71%
D 8121 8121 386 386 4.75% 4.75%

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 2428535 11846.37 838 818 204.9
A 12 250 1173714 5723.3 838 818 204.9
A 15 174 221320 1075.97 838 818 204.9
B 8 128 471203 2508.53 869 839 187.5
B 10 44 300789 1599.68 869 839 187.5
B 7 252 175890 933.58 869 839 187.5
C 5 250 2333348 10172.81 840 833 229.3
C 15 148 541560 2358.28 840 833 229.3
C 15 189 327164 1423.23 840 833 229.3
D 10 172 581751 2489.09 842 811 233.4
D 3 12 506647 2167.3 842 811 233.4
D 7 60 316027 1350.57 842 811 233.4

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