ASTROSAT CZTI

Data Quality Report

Orbit 39720

Creation date: 2024-06-27T22:08:11.226720
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/AS1A12_022T01_9000005494_39720cztM0_level2.fits modeM0/AS1A12_022T01_9000005494_39720cztM0_level2_quad_clean.evt
Size (bytes)1,215,374,400214,617,600
Size1.1 GB 204.7 MB
Events in quadrant A7,979,6081,545,899
Events in quadrant B7,175,8321,572,629
Events in quadrant C18,916,4561,127,117
Events in quadrant D9,884,7921,328,951

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02740
B02740
C02740
D02740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0316294
B0300143
C0654833
D0382623

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A133643142.349596%
B133643082.304699%
C13364371027.761149%
D133647905.911404%

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 18745 13367 201 201 1.07% 1.50%
B 18745 13367 215 215 1.15% 1.61%
C 18745 13367 3315 3315 17.68% 24.80%
D 18745 13367 673 673 3.59% 5.03%

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 10 83 953922 3096.29 1526 1495 307.6
A 13 248 648213 2102.45 1526 1495 307.6
A 15 174 445136 1442.25 1526 1495 307.6
B 5 255 608143 2105.35 1499 1459 288.2
B 5 172 497261 1720.56 1499 1459 288.2
B 0 190 100913 345.13 1499 1459 288.2
C 9 187 10467080 34400.55 1317 1325 304.2
C 15 208 1623257 5331.23 1317 1325 304.2
C 14 254 1038250 3408.33 1317 1325 304.2
D 12 227 2580849 7222.98 1467 1425 357.1
D 12 233 692673 1935.65 1467 1425 357.1
D 2 250 438441 1223.75 1467 1425 357.1

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