ASTROSAT CZTI

Data Quality Report

Orbit 20180719_T02_068T01_9000002238_level2

Creation date: 2025-11-23T14:54:27.182935
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_068T01_9000002238cztM0_level2.fits modeM0/AS1T02_068T01_9000002238cztM0_level2_quad_clean.evt
Size (bytes)1,120,023,3601,017,624,960
Size1.0 GB 970.5 MB
Events in quadrant A6,827,1486,042,246
Events in quadrant B6,441,6085,714,580
Events in quadrant C6,709,2965,648,991
Events in quadrant D5,805,8885,280,331

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024160
B024160
C024160
D024160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02670720
B02852650
C02700360
D02663010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11866320581.734323%
B11866368645.784448%
C11866315741.326445%
D11866333752.844189%

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 138879 118655 0 0 0.00% 0.00%
B 138879 118423 0 0 0.00% 0.00%
C 138879 118661 0 0 0.00% 0.00%
D 138879 118637 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 6683 11.54 1773 1658 435.6
A 7 110 5406 8.6 1773 1658 435.6
A 15 236 5179 8.08 1773 1658 435.6
B 2 9 5577 11.82 1702 1618 334.9
B 3 17 4387 8.27 1702 1618 334.9
B 5 128 4337 8.12 1702 1618 334.9
C 12 241 4633 6.5 1773 1641 460.0
C 2 191 4450 6.11 1773 1641 460.0
C 3 126 4429 6.06 1773 1641 460.0
D 3 14 4265 6.19 1656 1501 446.8
D 6 231 4257 6.17 1656 1501 446.8
D 10 189 4013 5.62 1656 1501 446.8

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