ASTROSAT CZTI

Data Quality Report

Orbit 51784

Creation date: 2025-04-25T09:08:27.658602
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_090T01_9000006464_51784cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51784cztM0_level2_quad_clean.evt
Size (bytes)597,038,40098,285,760
Size569.4 MB 93.7 MB
Events in quadrant A4,737,115654,873
Events in quadrant B4,785,479716,641
Events in quadrant C5,258,497608,919
Events in quadrant D6,790,277520,395

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0186842
B0189622
C0201012
D0249572

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68252153.150183%
B68262393.501318%
C68264827.061236%
D6826112516.481102%

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 8985 6827 223 223 2.48% 3.27%
B 8986 6827 135 135 1.50% 1.98%
C 8986 6828 427 427 4.75% 6.25%
D 8986 6827 1001 1001 11.14% 14.66%

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 11 14 442727 2444.34 736 719 180.8
A 11 3 373666 2062.43 736 719 180.8
A 3 14 194316 1070.61 736 719 180.8
B 4 206 1077760 6849.0 737 710 157.3
B 4 174 208467 1321.13 737 710 157.3
B 0 171 163979 1038.23 737 710 157.3
C 15 218 956221 4939.72 705 700 193.4
C 9 38 265116 1366.94 705 700 193.4
C 11 227 226167 1165.59 705 700 193.4
D 11 129 2877638 15420.58 666 642 186.6
D 3 12 829560 4442.97 666 642 186.6
D 10 172 130737 697.3 666 642 186.6

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